/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 02:45:30,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 02:45:30,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 02:45:30,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 02:45:30,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 02:45:30,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 02:45:30,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 02:45:30,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 02:45:30,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 02:45:30,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 02:45:30,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 02:45:30,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 02:45:30,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 02:45:30,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 02:45:30,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 02:45:30,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 02:45:30,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 02:45:30,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 02:45:30,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 02:45:30,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 02:45:30,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 02:45:30,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 02:45:30,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 02:45:30,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 02:45:30,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 02:45:30,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 02:45:30,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 02:45:30,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 02:45:30,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 02:45:30,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 02:45:30,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 02:45:30,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 02:45:30,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 02:45:30,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 02:45:30,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 02:45:30,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 02:45:30,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 02:45:30,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 02:45:30,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 02:45:30,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 02:45:30,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 02:45:30,790 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 02:45:30,810 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 02:45:30,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 02:45:30,811 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 02:45:30,811 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 02:45:30,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 02:45:30,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 02:45:30,812 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 02:45:30,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 02:45:30,812 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 02:45:30,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 02:45:30,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 02:45:30,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:45:30,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 02:45:30,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 02:45:30,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 02:45:30,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 02:45:31,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 02:45:31,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 02:45:31,011 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 02:45:31,011 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 02:45:31,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-01-28 02:45:31,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 02:45:32,117 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 02:45:32,117 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-symm.wvr.c [2023-01-28 02:45:32,122 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da62388da/7782b57af00448cd8c0e2e6ba10f9240/FLAG0acb9c8e3 [2023-01-28 02:45:32,135 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da62388da/7782b57af00448cd8c0e2e6ba10f9240 [2023-01-28 02:45:32,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 02:45:32,137 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 02:45:32,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 02:45:32,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 02:45:32,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 02:45:32,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578c09a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32, skipping insertion in model container [2023-01-28 02:45:32,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 02:45:32,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 02:45:32,266 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/chl-name-comparator-symm.wvr.c[3856,3869] [2023-01-28 02:45:32,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:45:32,278 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 02:45:32,294 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/chl-name-comparator-symm.wvr.c[3856,3869] [2023-01-28 02:45:32,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:45:32,306 INFO L208 MainTranslator]: Completed translation [2023-01-28 02:45:32,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32 WrapperNode [2023-01-28 02:45:32,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 02:45:32,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 02:45:32,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 02:45:32,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 02:45:32,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,335 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 227 [2023-01-28 02:45:32,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 02:45:32,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 02:45:32,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 02:45:32,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 02:45:32,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 02:45:32,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 02:45:32,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 02:45:32,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 02:45:32,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (1/1) ... [2023-01-28 02:45:32,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:45:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:32,378 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 02:45:32,382 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 02:45:32,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 02:45:32,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 02:45:32,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 02:45:32,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 02:45:32,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 02:45:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 02:45:32,403 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 02:45:32,489 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 02:45:32,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 02:45:32,848 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 02:45:32,856 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 02:45:32,856 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 02:45:32,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:45:32 BoogieIcfgContainer [2023-01-28 02:45:32,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 02:45:32,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 02:45:32,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 02:45:32,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 02:45:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 02:45:32" (1/3) ... [2023-01-28 02:45:32,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351766b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:45:32, skipping insertion in model container [2023-01-28 02:45:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:32" (2/3) ... [2023-01-28 02:45:32,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351766b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:45:32, skipping insertion in model container [2023-01-28 02:45:32,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:45:32" (3/3) ... [2023-01-28 02:45:32,863 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2023-01-28 02:45:32,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 02:45:32,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 02:45:32,874 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 02:45:32,932 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 02:45:32,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 260 transitions, 536 flow [2023-01-28 02:45:33,046 INFO L130 PetriNetUnfolder]: 19/258 cut-off events. [2023-01-28 02:45:33,046 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:45:33,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 258 events. 19/258 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-01-28 02:45:33,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 260 transitions, 536 flow [2023-01-28 02:45:33,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 250 transitions, 512 flow [2023-01-28 02:45:33,060 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 02:45:33,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 250 transitions, 512 flow [2023-01-28 02:45:33,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 250 transitions, 512 flow [2023-01-28 02:45:33,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 250 transitions, 512 flow [2023-01-28 02:45:33,107 INFO L130 PetriNetUnfolder]: 19/250 cut-off events. [2023-01-28 02:45:33,108 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:45:33,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 19/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 172. Up to 2 conditions per place. [2023-01-28 02:45:33,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 9828 [2023-01-28 02:45:39,224 INFO L134 LiptonReduction]: Checked pairs total: 8979 [2023-01-28 02:45:39,225 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-01-28 02:45:39,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 02:45:39,250 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;@4cb53801, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 02:45:39,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 02:45:39,257 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 02:45:39,257 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 02:45:39,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:39,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:39,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:39,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1252061878, now seen corresponding path program 1 times [2023-01-28 02:45:39,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:39,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046770799] [2023-01-28 02:45:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:39,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:39,618 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 02:45:39,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:39,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046770799] [2023-01-28 02:45:39,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046770799] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:39,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:39,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 02:45:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019294054] [2023-01-28 02:45:39,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:45:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:45:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:45:39,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 562 [2023-01-28 02:45:39,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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 02:45:39,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:39,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 562 [2023-01-28 02:45:39,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:39,695 INFO L130 PetriNetUnfolder]: 41/76 cut-off events. [2023-01-28 02:45:39,695 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 02:45:39,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 76 events. 41/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-28 02:45:39,697 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-28 02:45:39,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 84 flow [2023-01-28 02:45:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:45:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:45:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 709 transitions. [2023-01-28 02:45:39,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42052194543297744 [2023-01-28 02:45:39,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 709 transitions. [2023-01-28 02:45:39,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 709 transitions. [2023-01-28 02:45:39,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:39,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 709 transitions. [2023-01-28 02:45:39,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 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 02:45:39,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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 02:45:39,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 562.0) internal successors, (2248), 4 states have internal predecessors, (2248), 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 02:45:39,733 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 709 transitions. [2023-01-28 02:45:39,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 84 flow [2023-01-28 02:45:39,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 02:45:39,737 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-28 02:45:39,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-28 02:45:39,743 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 02:45:39,743 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-28 02:45:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 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 02:45:39,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:39,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 02:45:39,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:39,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -249759115, now seen corresponding path program 1 times [2023-01-28 02:45:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324056911] [2023-01-28 02:45:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:45:39,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324056911] [2023-01-28 02:45:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324056911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284813211] [2023-01-28 02:45:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:39,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:39,823 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 02:45:39,854 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 02:45:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 02:45:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:45:39,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:45:39,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284813211] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:39,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:39,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 02:45:39,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51295138] [2023-01-28 02:45:39,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:39,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:45:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:45:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-01-28 02:45:39,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 562 [2023-01-28 02:45:39,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 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 02:45:39,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:39,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 562 [2023-01-28 02:45:39,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:40,050 INFO L130 PetriNetUnfolder]: 41/78 cut-off events. [2023-01-28 02:45:40,050 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 02:45:40,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 78 events. 41/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 128 event pairs, 24 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 160. Up to 76 conditions per place. [2023-01-28 02:45:40,051 INFO L137 encePairwiseOnDemand]: 559/562 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2023-01-28 02:45:40,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 98 flow [2023-01-28 02:45:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1172 transitions. [2023-01-28 02:45:40,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170818505338078 [2023-01-28 02:45:40,053 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1172 transitions. [2023-01-28 02:45:40,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1172 transitions. [2023-01-28 02:45:40,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:40,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1172 transitions. [2023-01-28 02:45:40,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 234.4) internal successors, (1172), 5 states have internal predecessors, (1172), 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 02:45:40,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:40,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:40,060 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1172 transitions. [2023-01-28 02:45:40,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 98 flow [2023-01-28 02:45:40,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 94 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:40,061 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 72 flow [2023-01-28 02:45:40,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-01-28 02:45:40,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-01-28 02:45:40,062 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 72 flow [2023-01-28 02:45:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 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 02:45:40,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:40,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:40,068 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 02:45:40,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:40,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:40,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1257923115, now seen corresponding path program 2 times [2023-01-28 02:45:40,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:40,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554686011] [2023-01-28 02:45:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:40,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554686011] [2023-01-28 02:45:40,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554686011] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:40,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:40,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083456332] [2023-01-28 02:45:40,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:45:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:45:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 02:45:40,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-28 02:45:40,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 72 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:40,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:40,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-28 02:45:40,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:40,808 INFO L130 PetriNetUnfolder]: 57/107 cut-off events. [2023-01-28 02:45:40,808 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:45:40,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 107 events. 57/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 2 based on Foata normal form. 1/82 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2023-01-28 02:45:40,812 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 28 selfloop transitions, 8 changer transitions 3/39 dead transitions. [2023-01-28 02:45:40,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 192 flow [2023-01-28 02:45:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1007 transitions. [2023-01-28 02:45:40,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3583629893238434 [2023-01-28 02:45:40,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1007 transitions. [2023-01-28 02:45:40,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1007 transitions. [2023-01-28 02:45:40,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:40,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1007 transitions. [2023-01-28 02:45:40,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.4) internal successors, (1007), 5 states have internal predecessors, (1007), 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 02:45:40,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:40,821 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:40,821 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 72 flow. Second operand 5 states and 1007 transitions. [2023-01-28 02:45:40,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 192 flow [2023-01-28 02:45:40,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 182 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:40,823 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 119 flow [2023-01-28 02:45:40,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-01-28 02:45:40,824 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-28 02:45:40,824 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 119 flow [2023-01-28 02:45:40,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:40,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:40,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:40,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 02:45:40,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:40,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1542692659, now seen corresponding path program 3 times [2023-01-28 02:45:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965871500] [2023-01-28 02:45:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:41,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:41,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965871500] [2023-01-28 02:45:41,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965871500] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:41,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:41,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:41,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297616120] [2023-01-28 02:45:41,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:41,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:45:41,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:45:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 02:45:41,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-28 02:45:41,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:41,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:41,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-28 02:45:41,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:41,247 INFO L130 PetriNetUnfolder]: 73/136 cut-off events. [2023-01-28 02:45:41,247 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-01-28 02:45:41,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 136 events. 73/136 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 8 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 384. Up to 89 conditions per place. [2023-01-28 02:45:41,248 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 34 selfloop transitions, 9 changer transitions 1/44 dead transitions. [2023-01-28 02:45:41,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 263 flow [2023-01-28 02:45:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1005 transitions. [2023-01-28 02:45:41,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35765124555160144 [2023-01-28 02:45:41,251 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1005 transitions. [2023-01-28 02:45:41,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1005 transitions. [2023-01-28 02:45:41,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:41,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1005 transitions. [2023-01-28 02:45:41,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 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 02:45:41,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:41,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:41,257 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 119 flow. Second operand 5 states and 1005 transitions. [2023-01-28 02:45:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 263 flow [2023-01-28 02:45:41,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:41,259 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 190 flow [2023-01-28 02:45:41,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-01-28 02:45:41,260 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-01-28 02:45:41,260 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 190 flow [2023-01-28 02:45:41,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:41,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:41,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:41,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 02:45:41,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:41,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:41,261 INFO L85 PathProgramCache]: Analyzing trace with hash 916610877, now seen corresponding path program 4 times [2023-01-28 02:45:41,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:41,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187688450] [2023-01-28 02:45:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:41,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:41,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:41,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187688450] [2023-01-28 02:45:41,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187688450] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:41,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:41,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386701220] [2023-01-28 02:45:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:41,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:45:41,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:41,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:45:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 02:45:41,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-28 02:45:41,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:41,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:41,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-28 02:45:41,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:41,837 INFO L130 PetriNetUnfolder]: 135/258 cut-off events. [2023-01-28 02:45:41,837 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-01-28 02:45:41,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 258 events. 135/258 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 915 event pairs, 22 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 877. Up to 120 conditions per place. [2023-01-28 02:45:41,840 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 50 selfloop transitions, 8 changer transitions 8/66 dead transitions. [2023-01-28 02:45:41,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 466 flow [2023-01-28 02:45:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1015 transitions. [2023-01-28 02:45:41,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3612099644128114 [2023-01-28 02:45:41,842 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1015 transitions. [2023-01-28 02:45:41,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1015 transitions. [2023-01-28 02:45:41,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:41,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1015 transitions. [2023-01-28 02:45:41,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 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 02:45:41,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:41,847 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:41,847 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 190 flow. Second operand 5 states and 1015 transitions. [2023-01-28 02:45:41,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 466 flow [2023-01-28 02:45:41,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 66 transitions, 449 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:41,852 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 249 flow [2023-01-28 02:45:41,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-01-28 02:45:41,854 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-28 02:45:41,854 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 249 flow [2023-01-28 02:45:41,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:41,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:41,855 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 02:45:41,855 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:41,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1558748101, now seen corresponding path program 5 times [2023-01-28 02:45:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:41,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458137603] [2023-01-28 02:45:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:42,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:42,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458137603] [2023-01-28 02:45:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458137603] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:42,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:42,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754309632] [2023-01-28 02:45:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:42,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:45:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:45:42,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 02:45:42,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-28 02:45:42,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:42,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:42,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-28 02:45:42,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:42,297 INFO L130 PetriNetUnfolder]: 131/254 cut-off events. [2023-01-28 02:45:42,297 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2023-01-28 02:45:42,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 254 events. 131/254 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 918 event pairs, 14 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 962. Up to 138 conditions per place. [2023-01-28 02:45:42,298 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 46 selfloop transitions, 12 changer transitions 1/59 dead transitions. [2023-01-28 02:45:42,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 463 flow [2023-01-28 02:45:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1009 transitions. [2023-01-28 02:45:42,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3590747330960854 [2023-01-28 02:45:42,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1009 transitions. [2023-01-28 02:45:42,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1009 transitions. [2023-01-28 02:45:42,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:42,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1009 transitions. [2023-01-28 02:45:42,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.8) internal successors, (1009), 5 states have internal predecessors, (1009), 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 02:45:42,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:42,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:42,306 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 249 flow. Second operand 5 states and 1009 transitions. [2023-01-28 02:45:42,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 463 flow [2023-01-28 02:45:42,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:42,309 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 321 flow [2023-01-28 02:45:42,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-01-28 02:45:42,310 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2023-01-28 02:45:42,310 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 321 flow [2023-01-28 02:45:42,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:42,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:42,310 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:42,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 02:45:42,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:42,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash 441881161, now seen corresponding path program 6 times [2023-01-28 02:45:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:42,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073848833] [2023-01-28 02:45:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:42,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073848833] [2023-01-28 02:45:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073848833] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:42,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:42,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:42,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655598636] [2023-01-28 02:45:42,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:42,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:45:42,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:45:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 02:45:42,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 562 [2023-01-28 02:45:42,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 321 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:42,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:42,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 562 [2023-01-28 02:45:42,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:42,776 INFO L130 PetriNetUnfolder]: 188/375 cut-off events. [2023-01-28 02:45:42,776 INFO L131 PetriNetUnfolder]: For 956/956 co-relation queries the response was YES. [2023-01-28 02:45:42,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 375 events. 188/375 cut-off events. For 956/956 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1607 event pairs, 48 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 1592. Up to 219 conditions per place. [2023-01-28 02:45:42,779 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 57 selfloop transitions, 14 changer transitions 5/76 dead transitions. [2023-01-28 02:45:42,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 695 flow [2023-01-28 02:45:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2023-01-28 02:45:42,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604982206405694 [2023-01-28 02:45:42,782 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2023-01-28 02:45:42,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2023-01-28 02:45:42,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:42,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2023-01-28 02:45:42,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 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 02:45:42,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:42,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:42,788 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 321 flow. Second operand 5 states and 1013 transitions. [2023-01-28 02:45:42,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 695 flow [2023-01-28 02:45:42,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 664 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 02:45:42,792 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 462 flow [2023-01-28 02:45:42,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-01-28 02:45:42,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-01-28 02:45:42,792 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 462 flow [2023-01-28 02:45:42,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 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 02:45:42,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:42,793 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:42,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 02:45:42,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:42,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 188433506, now seen corresponding path program 1 times [2023-01-28 02:45:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294522539] [2023-01-28 02:45:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294522539] [2023-01-28 02:45:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294522539] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226580035] [2023-01-28 02:45:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:42,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:42,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:42,925 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 02:45:42,927 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 02:45:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 02:45:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:43,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:43,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226580035] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:43,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:43,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 02:45:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545163137] [2023-01-28 02:45:43,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 02:45:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:43,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 02:45:43,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 02:45:43,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:43,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 462 flow. Second operand has 8 states, 8 states have (on average 206.125) internal successors, (1649), 8 states have internal predecessors, (1649), 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 02:45:43,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:43,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:43,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:43,236 INFO L130 PetriNetUnfolder]: 184/360 cut-off events. [2023-01-28 02:45:43,236 INFO L131 PetriNetUnfolder]: For 1397/1397 co-relation queries the response was YES. [2023-01-28 02:45:43,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1784 conditions, 360 events. 184/360 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1461 event pairs, 26 based on Foata normal form. 12/360 useless extension candidates. Maximal degree in co-relation 1748. Up to 161 conditions per place. [2023-01-28 02:45:43,239 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 61 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2023-01-28 02:45:43,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 734 flow [2023-01-28 02:45:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1057 transitions. [2023-01-28 02:45:43,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37615658362989324 [2023-01-28 02:45:43,241 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1057 transitions. [2023-01-28 02:45:43,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1057 transitions. [2023-01-28 02:45:43,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:43,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1057 transitions. [2023-01-28 02:45:43,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.4) internal successors, (1057), 5 states have internal predecessors, (1057), 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 02:45:43,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:43,246 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:43,246 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 462 flow. Second operand 5 states and 1057 transitions. [2023-01-28 02:45:43,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 734 flow [2023-01-28 02:45:43,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 718 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-28 02:45:43,251 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 485 flow [2023-01-28 02:45:43,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-01-28 02:45:43,251 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-01-28 02:45:43,251 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 485 flow [2023-01-28 02:45:43,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 206.125) internal successors, (1649), 8 states have internal predecessors, (1649), 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 02:45:43,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:43,252 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:43,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 02:45:43,456 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,SelfDestructingSolverStorable7 [2023-01-28 02:45:43,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:43,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -558172369, now seen corresponding path program 1 times [2023-01-28 02:45:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:43,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436948642] [2023-01-28 02:45:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:43,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:43,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436948642] [2023-01-28 02:45:43,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436948642] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:43,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:43,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133271090] [2023-01-28 02:45:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:43,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:43,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:43,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:43,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:43,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:43,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:43,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:43,676 INFO L130 PetriNetUnfolder]: 174/340 cut-off events. [2023-01-28 02:45:43,677 INFO L131 PetriNetUnfolder]: For 1684/1684 co-relation queries the response was YES. [2023-01-28 02:45:43,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 340 events. 174/340 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1344 event pairs, 48 based on Foata normal form. 4/332 useless extension candidates. Maximal degree in co-relation 1745. Up to 200 conditions per place. [2023-01-28 02:45:43,679 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 12 changer transitions 9/74 dead transitions. [2023-01-28 02:45:43,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 753 flow [2023-01-28 02:45:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1056 transitions. [2023-01-28 02:45:43,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758007117437722 [2023-01-28 02:45:43,681 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1056 transitions. [2023-01-28 02:45:43,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1056 transitions. [2023-01-28 02:45:43,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:43,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1056 transitions. [2023-01-28 02:45:43,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 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 02:45:43,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:43,686 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:43,686 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 485 flow. Second operand 5 states and 1056 transitions. [2023-01-28 02:45:43,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 753 flow [2023-01-28 02:45:43,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 723 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 02:45:43,690 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 500 flow [2023-01-28 02:45:43,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-01-28 02:45:43,691 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-01-28 02:45:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 500 flow [2023-01-28 02:45:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:43,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:43,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:43,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 02:45:43,691 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:43,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -124247684, now seen corresponding path program 2 times [2023-01-28 02:45:43,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:43,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782897243] [2023-01-28 02:45:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:43,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782897243] [2023-01-28 02:45:43,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782897243] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954887832] [2023-01-28 02:45:43,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:45:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:43,813 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 02:45:43,815 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 02:45:43,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:45:43,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:45:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 02:45:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:43,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:44,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954887832] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:44,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 02:45:44,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2023-01-28 02:45:44,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467454767] [2023-01-28 02:45:44,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:44,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:44,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:44,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-01-28 02:45:44,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:44,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:44,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:44,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:44,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:44,192 INFO L130 PetriNetUnfolder]: 162/317 cut-off events. [2023-01-28 02:45:44,193 INFO L131 PetriNetUnfolder]: For 1430/1430 co-relation queries the response was YES. [2023-01-28 02:45:44,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 317 events. 162/317 cut-off events. For 1430/1430 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1232 event pairs, 18 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 1678. Up to 240 conditions per place. [2023-01-28 02:45:44,195 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 57 selfloop transitions, 13 changer transitions 0/70 dead transitions. [2023-01-28 02:45:44,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 739 flow [2023-01-28 02:45:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1054 transitions. [2023-01-28 02:45:44,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37508896797153024 [2023-01-28 02:45:44,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1054 transitions. [2023-01-28 02:45:44,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1054 transitions. [2023-01-28 02:45:44,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:44,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1054 transitions. [2023-01-28 02:45:44,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 02:45:44,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:44,212 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:44,212 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 500 flow. Second operand 5 states and 1054 transitions. [2023-01-28 02:45:44,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 739 flow [2023-01-28 02:45:44,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 705 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-01-28 02:45:44,217 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 524 flow [2023-01-28 02:45:44,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-01-28 02:45:44,218 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-01-28 02:45:44,218 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 524 flow [2023-01-28 02:45:44,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:44,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:44,218 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:44,224 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 02:45:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:44,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:44,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 83227730, now seen corresponding path program 3 times [2023-01-28 02:45:44,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:44,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840912619] [2023-01-28 02:45:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840912619] [2023-01-28 02:45:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840912619] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:44,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742635178] [2023-01-28 02:45:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:44,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:44,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:44,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:44,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:44,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:44,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:44,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:44,648 INFO L130 PetriNetUnfolder]: 158/305 cut-off events. [2023-01-28 02:45:44,649 INFO L131 PetriNetUnfolder]: For 1625/1625 co-relation queries the response was YES. [2023-01-28 02:45:44,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685 conditions, 305 events. 158/305 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1139 event pairs, 43 based on Foata normal form. 2/297 useless extension candidates. Maximal degree in co-relation 1646. Up to 189 conditions per place. [2023-01-28 02:45:44,651 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 52 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2023-01-28 02:45:44,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 691 flow [2023-01-28 02:45:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-01-28 02:45:44,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736654804270463 [2023-01-28 02:45:44,653 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-01-28 02:45:44,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-01-28 02:45:44,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:44,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-01-28 02:45:44,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 02:45:44,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:44,657 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:44,657 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 524 flow. Second operand 5 states and 1050 transitions. [2023-01-28 02:45:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 691 flow [2023-01-28 02:45:44,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 676 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-28 02:45:44,662 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 512 flow [2023-01-28 02:45:44,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-01-28 02:45:44,662 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-01-28 02:45:44,662 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 512 flow [2023-01-28 02:45:44,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:44,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:44,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 02:45:44,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:44,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash 452015418, now seen corresponding path program 4 times [2023-01-28 02:45:44,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:44,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559594030] [2023-01-28 02:45:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:44,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:44,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:44,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559594030] [2023-01-28 02:45:44,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559594030] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:44,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912678959] [2023-01-28 02:45:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:44,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:44,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 512 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:44,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:44,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:44,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:44,898 INFO L130 PetriNetUnfolder]: 155/300 cut-off events. [2023-01-28 02:45:44,898 INFO L131 PetriNetUnfolder]: For 1597/1597 co-relation queries the response was YES. [2023-01-28 02:45:44,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 300 events. 155/300 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1126 event pairs, 37 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 1626. Up to 200 conditions per place. [2023-01-28 02:45:44,900 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 53 selfloop transitions, 14 changer transitions 7/74 dead transitions. [2023-01-28 02:45:44,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 815 flow [2023-01-28 02:45:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1054 transitions. [2023-01-28 02:45:44,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37508896797153024 [2023-01-28 02:45:44,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1054 transitions. [2023-01-28 02:45:44,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1054 transitions. [2023-01-28 02:45:44,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:44,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1054 transitions. [2023-01-28 02:45:44,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.8) internal successors, (1054), 5 states have internal predecessors, (1054), 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 02:45:44,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:44,907 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:44,907 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 512 flow. Second operand 5 states and 1054 transitions. [2023-01-28 02:45:44,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 815 flow [2023-01-28 02:45:44,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:44,911 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 549 flow [2023-01-28 02:45:44,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-01-28 02:45:44,911 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-01-28 02:45:44,911 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 549 flow [2023-01-28 02:45:44,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:44,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:44,911 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:44,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 02:45:44,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:44,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1469209266, now seen corresponding path program 5 times [2023-01-28 02:45:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:44,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090236461] [2023-01-28 02:45:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090236461] [2023-01-28 02:45:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090236461] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199116445] [2023-01-28 02:45:45,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:45,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:45,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:45,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:45,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:45,129 INFO L130 PetriNetUnfolder]: 150/286 cut-off events. [2023-01-28 02:45:45,130 INFO L131 PetriNetUnfolder]: For 1693/1693 co-relation queries the response was YES. [2023-01-28 02:45:45,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 286 events. 150/286 cut-off events. For 1693/1693 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1013 event pairs, 39 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 1640. Up to 200 conditions per place. [2023-01-28 02:45:45,132 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 49 selfloop transitions, 14 changer transitions 2/65 dead transitions. [2023-01-28 02:45:45,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 742 flow [2023-01-28 02:45:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1051 transitions. [2023-01-28 02:45:45,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37402135231316724 [2023-01-28 02:45:45,135 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1051 transitions. [2023-01-28 02:45:45,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1051 transitions. [2023-01-28 02:45:45,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:45,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1051 transitions. [2023-01-28 02:45:45,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 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 02:45:45,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,139 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,139 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 549 flow. Second operand 5 states and 1051 transitions. [2023-01-28 02:45:45,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 742 flow [2023-01-28 02:45:45,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 708 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 02:45:45,144 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 537 flow [2023-01-28 02:45:45,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-01-28 02:45:45,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-01-28 02:45:45,144 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 537 flow [2023-01-28 02:45:45,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:45,145 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 02:45:45,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:45,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1010058385, now seen corresponding path program 2 times [2023-01-28 02:45:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:45,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421334338] [2023-01-28 02:45:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421334338] [2023-01-28 02:45:45,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421334338] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:45,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841640231] [2023-01-28 02:45:45,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:45,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:45,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:45,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:45,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:45,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:45,367 INFO L130 PetriNetUnfolder]: 145/274 cut-off events. [2023-01-28 02:45:45,367 INFO L131 PetriNetUnfolder]: For 1653/1653 co-relation queries the response was YES. [2023-01-28 02:45:45,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 274 events. 145/274 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 960 event pairs, 11 based on Foata normal form. 8/276 useless extension candidates. Maximal degree in co-relation 1558. Up to 137 conditions per place. [2023-01-28 02:45:45,369 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 51 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2023-01-28 02:45:45,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 755 flow [2023-01-28 02:45:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1053 transitions. [2023-01-28 02:45:45,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747330960854093 [2023-01-28 02:45:45,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1053 transitions. [2023-01-28 02:45:45,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1053 transitions. [2023-01-28 02:45:45,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:45,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1053 transitions. [2023-01-28 02:45:45,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.6) internal successors, (1053), 5 states have internal predecessors, (1053), 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 02:45:45,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,376 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,377 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 537 flow. Second operand 5 states and 1053 transitions. [2023-01-28 02:45:45,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 755 flow [2023-01-28 02:45:45,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 732 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-28 02:45:45,381 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 544 flow [2023-01-28 02:45:45,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-01-28 02:45:45,382 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-01-28 02:45:45,382 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 544 flow [2023-01-28 02:45:45,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:45,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 02:45:45,383 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:45,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 813217747, now seen corresponding path program 3 times [2023-01-28 02:45:45,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:45,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904613582] [2023-01-28 02:45:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:45,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904613582] [2023-01-28 02:45:45,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904613582] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133454198] [2023-01-28 02:45:45,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:45,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:45,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:45,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:45,603 INFO L130 PetriNetUnfolder]: 141/270 cut-off events. [2023-01-28 02:45:45,603 INFO L131 PetriNetUnfolder]: For 1886/1886 co-relation queries the response was YES. [2023-01-28 02:45:45,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 270 events. 141/270 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 946 event pairs, 41 based on Foata normal form. 4/266 useless extension candidates. Maximal degree in co-relation 1546. Up to 187 conditions per place. [2023-01-28 02:45:45,605 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 44 selfloop transitions, 13 changer transitions 4/61 dead transitions. [2023-01-28 02:45:45,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 61 transitions, 699 flow [2023-01-28 02:45:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-01-28 02:45:45,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736654804270463 [2023-01-28 02:45:45,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-01-28 02:45:45,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-01-28 02:45:45,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:45,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-01-28 02:45:45,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 02:45:45,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,611 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,612 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 544 flow. Second operand 5 states and 1050 transitions. [2023-01-28 02:45:45,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 61 transitions, 699 flow [2023-01-28 02:45:45,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 668 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-01-28 02:45:45,616 INFO L231 Difference]: Finished difference. Result has 72 places, 49 transitions, 509 flow [2023-01-28 02:45:45,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=509, PETRI_PLACES=72, PETRI_TRANSITIONS=49} [2023-01-28 02:45:45,616 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-01-28 02:45:45,616 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 49 transitions, 509 flow [2023-01-28 02:45:45,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:45,617 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:45,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 02:45:45,617 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:45,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:45,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2119422363, now seen corresponding path program 4 times [2023-01-28 02:45:45,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:45,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780159845] [2023-01-28 02:45:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780159845] [2023-01-28 02:45:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780159845] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:45,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841046470] [2023-01-28 02:45:45,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:45,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:45,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 49 transitions, 509 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:45,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:45,804 INFO L130 PetriNetUnfolder]: 124/230 cut-off events. [2023-01-28 02:45:45,805 INFO L131 PetriNetUnfolder]: For 1587/1587 co-relation queries the response was YES. [2023-01-28 02:45:45,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 230 events. 124/230 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 718 event pairs, 31 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1364. Up to 144 conditions per place. [2023-01-28 02:45:45,806 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 43 selfloop transitions, 14 changer transitions 0/57 dead transitions. [2023-01-28 02:45:45,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 660 flow [2023-01-28 02:45:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-01-28 02:45:45,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736654804270463 [2023-01-28 02:45:45,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-01-28 02:45:45,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-01-28 02:45:45,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:45,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-01-28 02:45:45,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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 02:45:45,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,813 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:45,813 INFO L175 Difference]: Start difference. First operand has 72 places, 49 transitions, 509 flow. Second operand 5 states and 1050 transitions. [2023-01-28 02:45:45,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 660 flow [2023-01-28 02:45:45,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 612 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-01-28 02:45:45,817 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 464 flow [2023-01-28 02:45:45,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-01-28 02:45:45,817 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-01-28 02:45:45,817 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 464 flow [2023-01-28 02:45:45,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:45,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:45,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 02:45:45,818 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:45,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1470993204, now seen corresponding path program 6 times [2023-01-28 02:45:45,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:45,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292142728] [2023-01-28 02:45:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:45,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292142728] [2023-01-28 02:45:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292142728] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:45:45,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170883751] [2023-01-28 02:45:45,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:45,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:45,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 562 [2023-01-28 02:45:45,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:45,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 562 [2023-01-28 02:45:45,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:46,021 INFO L130 PetriNetUnfolder]: 114/205 cut-off events. [2023-01-28 02:45:46,021 INFO L131 PetriNetUnfolder]: For 1406/1406 co-relation queries the response was YES. [2023-01-28 02:45:46,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 205 events. 114/205 cut-off events. For 1406/1406 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 601 event pairs, 31 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 1221. Up to 152 conditions per place. [2023-01-28 02:45:46,023 INFO L137 encePairwiseOnDemand]: 557/562 looper letters, 41 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-01-28 02:45:46,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 54 transitions, 609 flow [2023-01-28 02:45:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1049 transitions. [2023-01-28 02:45:46,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37330960854092526 [2023-01-28 02:45:46,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1049 transitions. [2023-01-28 02:45:46,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1049 transitions. [2023-01-28 02:45:46,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:46,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1049 transitions. [2023-01-28 02:45:46,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.8) internal successors, (1049), 5 states have internal predecessors, (1049), 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 02:45:46,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:46,029 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 562.0) internal successors, (3372), 6 states have internal predecessors, (3372), 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 02:45:46,029 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 464 flow. Second operand 5 states and 1049 transitions. [2023-01-28 02:45:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 54 transitions, 609 flow [2023-01-28 02:45:46,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 539 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-01-28 02:45:46,032 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 405 flow [2023-01-28 02:45:46,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-01-28 02:45:46,033 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-01-28 02:45:46,033 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 405 flow [2023-01-28 02:45:46,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 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 02:45:46,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:46,033 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:46,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 02:45:46,033 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:46,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash 727784278, now seen corresponding path program 1 times [2023-01-28 02:45:46,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:46,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447869900] [2023-01-28 02:45:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:46,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:46,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:46,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447869900] [2023-01-28 02:45:46,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447869900] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:46,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898191779] [2023-01-28 02:45:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:46,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:46,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:46,761 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 02:45:46,763 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 02:45:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:46,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 02:45:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:47,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2023-01-28 02:45:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:47,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:48,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:45:48,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 144 [2023-01-28 02:45:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898191779] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:48,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:48,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-28 02:45:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293823289] [2023-01-28 02:45:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:45:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:45:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:45:48,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:45:48,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 405 flow. Second operand has 23 states, 23 states have (on average 178.04347826086956) internal successors, (4095), 23 states have internal predecessors, (4095), 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 02:45:48,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:48,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:45:48,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:50,940 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-01-28 02:45:50,941 INFO L131 PetriNetUnfolder]: For 2245/2245 co-relation queries the response was YES. [2023-01-28 02:45:50,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 503 events. 265/503 cut-off events. For 2245/2245 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2212 event pairs, 15 based on Foata normal form. 3/504 useless extension candidates. Maximal degree in co-relation 2583. Up to 142 conditions per place. [2023-01-28 02:45:50,944 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 90 selfloop transitions, 51 changer transitions 28/169 dead transitions. [2023-01-28 02:45:50,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 169 transitions, 1513 flow [2023-01-28 02:45:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 02:45:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 02:45:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4185 transitions. [2023-01-28 02:45:50,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237660529166022 [2023-01-28 02:45:50,951 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4185 transitions. [2023-01-28 02:45:50,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4185 transitions. [2023-01-28 02:45:50,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:50,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4185 transitions. [2023-01-28 02:45:50,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 181.95652173913044) internal successors, (4185), 23 states have internal predecessors, (4185), 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 02:45:50,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 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 02:45:50,967 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 562.0) internal successors, (13488), 24 states have internal predecessors, (13488), 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 02:45:50,967 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 405 flow. Second operand 23 states and 4185 transitions. [2023-01-28 02:45:50,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 169 transitions, 1513 flow [2023-01-28 02:45:50,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 1435 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-28 02:45:50,975 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 933 flow [2023-01-28 02:45:50,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=933, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-01-28 02:45:50,975 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-01-28 02:45:50,975 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 933 flow [2023-01-28 02:45:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.04347826086956) internal successors, (4095), 23 states have internal predecessors, (4095), 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 02:45:50,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:50,976 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:50,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 02:45:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 02:45:51,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:51,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 765734618, now seen corresponding path program 2 times [2023-01-28 02:45:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:51,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732694273] [2023-01-28 02:45:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732694273] [2023-01-28 02:45:51,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732694273] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670694859] [2023-01-28 02:45:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:45:51,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:51,913 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 02:45:51,915 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 02:45:52,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:45:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:45:52,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:45:52,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:52,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 115 [2023-01-28 02:45:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:52,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:53,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:45:53,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 220 [2023-01-28 02:45:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:54,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670694859] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:54,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-28 02:45:54,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905748729] [2023-01-28 02:45:54,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 02:45:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 02:45:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 02:45:54,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:45:54,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 933 flow. Second operand has 22 states, 22 states have (on average 178.0) internal successors, (3916), 22 states have internal predecessors, (3916), 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 02:45:54,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:54,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:45:54,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:55,974 INFO L130 PetriNetUnfolder]: 309/625 cut-off events. [2023-01-28 02:45:55,974 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-01-28 02:45:55,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 625 events. 309/625 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3053 event pairs, 42 based on Foata normal form. 3/628 useless extension candidates. Maximal degree in co-relation 3554. Up to 184 conditions per place. [2023-01-28 02:45:55,978 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 96 selfloop transitions, 58 changer transitions 7/161 dead transitions. [2023-01-28 02:45:55,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 161 transitions, 1887 flow [2023-01-28 02:45:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 02:45:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 02:45:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2901 transitions. [2023-01-28 02:45:55,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32262010676156583 [2023-01-28 02:45:55,982 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2901 transitions. [2023-01-28 02:45:55,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2901 transitions. [2023-01-28 02:45:55,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:55,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2901 transitions. [2023-01-28 02:45:55,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 181.3125) internal successors, (2901), 16 states have internal predecessors, (2901), 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 02:45:55,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 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 02:45:55,992 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 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 02:45:55,992 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 933 flow. Second operand 16 states and 2901 transitions. [2023-01-28 02:45:55,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 161 transitions, 1887 flow [2023-01-28 02:45:56,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 161 transitions, 1564 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-01-28 02:45:56,004 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1196 flow [2023-01-28 02:45:56,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1196, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2023-01-28 02:45:56,004 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-28 02:45:56,004 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1196 flow [2023-01-28 02:45:56,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 178.0) internal successors, (3916), 22 states have internal predecessors, (3916), 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 02:45:56,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:56,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:56,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 02:45:56,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:56,219 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:45:56,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash -12713086, now seen corresponding path program 3 times [2023-01-28 02:45:56,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:56,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022956306] [2023-01-28 02:45:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:56,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022956306] [2023-01-28 02:45:56,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022956306] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149567456] [2023-01-28 02:45:56,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:45:56,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:56,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:56,906 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 02:45:56,908 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 02:45:57,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:45:57,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:45:57,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 02:45:57,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:57,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 129 [2023-01-28 02:45:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:57,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:59,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:45:59,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 344 treesize of output 232 [2023-01-28 02:45:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149567456] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:59,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:59,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-28 02:45:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087106341] [2023-01-28 02:45:59,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:59,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:45:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:45:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:45:59,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:45:59,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1196 flow. Second operand has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 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 02:45:59,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:59,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:45:59,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:02,249 INFO L130 PetriNetUnfolder]: 400/856 cut-off events. [2023-01-28 02:46:02,249 INFO L131 PetriNetUnfolder]: For 4962/4962 co-relation queries the response was YES. [2023-01-28 02:46:02,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4523 conditions, 856 events. 400/856 cut-off events. For 4962/4962 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4841 event pairs, 73 based on Foata normal form. 12/866 useless extension candidates. Maximal degree in co-relation 4474. Up to 411 conditions per place. [2023-01-28 02:46:02,255 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 141 selfloop transitions, 77 changer transitions 20/238 dead transitions. [2023-01-28 02:46:02,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 238 transitions, 2432 flow [2023-01-28 02:46:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 02:46:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 02:46:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4724 transitions. [2023-01-28 02:46:02,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32329592116068984 [2023-01-28 02:46:02,260 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4724 transitions. [2023-01-28 02:46:02,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4724 transitions. [2023-01-28 02:46:02,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:02,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4724 transitions. [2023-01-28 02:46:02,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 181.69230769230768) internal successors, (4724), 26 states have internal predecessors, (4724), 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 02:46:02,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 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 02:46:02,276 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 562.0) internal successors, (15174), 27 states have internal predecessors, (15174), 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 02:46:02,276 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1196 flow. Second operand 26 states and 4724 transitions. [2023-01-28 02:46:02,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 238 transitions, 2432 flow [2023-01-28 02:46:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 238 transitions, 2236 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-01-28 02:46:02,296 INFO L231 Difference]: Finished difference. Result has 130 places, 149 transitions, 1639 flow [2023-01-28 02:46:02,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1639, PETRI_PLACES=130, PETRI_TRANSITIONS=149} [2023-01-28 02:46:02,296 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2023-01-28 02:46:02,296 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 149 transitions, 1639 flow [2023-01-28 02:46:02,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 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 02:46:02,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:02,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:02,304 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 02:46:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:02,505 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:02,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2073572888, now seen corresponding path program 4 times [2023-01-28 02:46:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523076956] [2023-01-28 02:46:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:03,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523076956] [2023-01-28 02:46:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523076956] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275711903] [2023-01-28 02:46:03,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:46:03,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:03,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:03,074 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 02:46:03,076 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 02:46:03,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:46:03,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 02:46:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:03,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 129 [2023-01-28 02:46:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:03,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:05,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:05,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 354 treesize of output 234 [2023-01-28 02:46:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:05,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275711903] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:05,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:05,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-28 02:46:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114788530] [2023-01-28 02:46:05,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:05,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:46:05,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:46:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:46:05,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:46:05,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 149 transitions, 1639 flow. Second operand has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 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 02:46:05,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:05,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:46:05,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:07,293 INFO L130 PetriNetUnfolder]: 427/929 cut-off events. [2023-01-28 02:46:07,294 INFO L131 PetriNetUnfolder]: For 5290/5290 co-relation queries the response was YES. [2023-01-28 02:46:07,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4997 conditions, 929 events. 427/929 cut-off events. For 5290/5290 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5441 event pairs, 55 based on Foata normal form. 9/936 useless extension candidates. Maximal degree in co-relation 4939. Up to 239 conditions per place. [2023-01-28 02:46:07,300 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 127 selfloop transitions, 81 changer transitions 21/229 dead transitions. [2023-01-28 02:46:07,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2700 flow [2023-01-28 02:46:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 02:46:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 02:46:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3273 transitions. [2023-01-28 02:46:07,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235468564650059 [2023-01-28 02:46:07,304 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3273 transitions. [2023-01-28 02:46:07,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3273 transitions. [2023-01-28 02:46:07,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:07,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3273 transitions. [2023-01-28 02:46:07,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.83333333333334) internal successors, (3273), 18 states have internal predecessors, (3273), 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 02:46:07,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 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 02:46:07,313 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 562.0) internal successors, (10678), 19 states have internal predecessors, (10678), 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 02:46:07,313 INFO L175 Difference]: Start difference. First operand has 130 places, 149 transitions, 1639 flow. Second operand 18 states and 3273 transitions. [2023-01-28 02:46:07,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2700 flow [2023-01-28 02:46:07,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 229 transitions, 2445 flow, removed 117 selfloop flow, removed 7 redundant places. [2023-01-28 02:46:07,339 INFO L231 Difference]: Finished difference. Result has 146 places, 163 transitions, 1802 flow [2023-01-28 02:46:07,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1802, PETRI_PLACES=146, PETRI_TRANSITIONS=163} [2023-01-28 02:46:07,340 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-01-28 02:46:07,340 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 163 transitions, 1802 flow [2023-01-28 02:46:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 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 02:46:07,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:07,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:07,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 02:46:07,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:07,557 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:07,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1557072660, now seen corresponding path program 5 times [2023-01-28 02:46:07,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:07,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998014924] [2023-01-28 02:46:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:07,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:08,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998014924] [2023-01-28 02:46:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998014924] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617633501] [2023-01-28 02:46:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:46:08,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:08,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:08,135 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 02:46:08,136 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 02:46:08,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:46:08,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:46:08,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:08,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 139 [2023-01-28 02:46:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:08,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:10,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:10,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 213 [2023-01-28 02:46:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617633501] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:10,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:10,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-28 02:46:10,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479923732] [2023-01-28 02:46:10,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:10,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:46:10,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:46:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:46:10,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:46:10,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 163 transitions, 1802 flow. Second operand has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 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 02:46:10,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:10,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:46:10,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:11,764 INFO L130 PetriNetUnfolder]: 471/1035 cut-off events. [2023-01-28 02:46:11,764 INFO L131 PetriNetUnfolder]: For 6541/6541 co-relation queries the response was YES. [2023-01-28 02:46:11,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5678 conditions, 1035 events. 471/1035 cut-off events. For 6541/6541 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6357 event pairs, 78 based on Foata normal form. 2/1035 useless extension candidates. Maximal degree in co-relation 5614. Up to 441 conditions per place. [2023-01-28 02:46:11,770 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 160 selfloop transitions, 90 changer transitions 12/262 dead transitions. [2023-01-28 02:46:11,770 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 262 transitions, 3113 flow [2023-01-28 02:46:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 02:46:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 02:46:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3808 transitions. [2023-01-28 02:46:11,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32265717674970346 [2023-01-28 02:46:11,776 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3808 transitions. [2023-01-28 02:46:11,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3808 transitions. [2023-01-28 02:46:11,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:11,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3808 transitions. [2023-01-28 02:46:11,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 181.33333333333334) internal successors, (3808), 21 states have internal predecessors, (3808), 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 02:46:11,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 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 02:46:11,786 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 562.0) internal successors, (12364), 22 states have internal predecessors, (12364), 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 02:46:11,786 INFO L175 Difference]: Start difference. First operand has 146 places, 163 transitions, 1802 flow. Second operand 21 states and 3808 transitions. [2023-01-28 02:46:11,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 262 transitions, 3113 flow [2023-01-28 02:46:11,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 262 transitions, 2965 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-01-28 02:46:11,813 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 2317 flow [2023-01-28 02:46:11,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2317, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2023-01-28 02:46:11,813 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-01-28 02:46:11,813 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 2317 flow [2023-01-28 02:46:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 178.04761904761904) internal successors, (3739), 21 states have internal predecessors, (3739), 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 02:46:11,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:11,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:11,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 02:46:12,018 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,SelfDestructingSolverStorable21 [2023-01-28 02:46:12,018 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:12,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -840476054, now seen corresponding path program 6 times [2023-01-28 02:46:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656063453] [2023-01-28 02:46:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:12,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:12,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656063453] [2023-01-28 02:46:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656063453] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:12,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077400894] [2023-01-28 02:46:12,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:46:12,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:12,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:12,536 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 02:46:12,538 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 02:46:12,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:46:12,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 02:46:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:12,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2023-01-28 02:46:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:13,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:15,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:15,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 441 treesize of output 321 [2023-01-28 02:46:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077400894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:15,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:15,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-01-28 02:46:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604359624] [2023-01-28 02:46:15,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:15,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:46:15,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:46:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:46:15,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:46:15,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 2317 flow. Second operand has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 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 02:46:15,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:15,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:46:15,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:17,572 INFO L130 PetriNetUnfolder]: 536/1174 cut-off events. [2023-01-28 02:46:17,572 INFO L131 PetriNetUnfolder]: For 9351/9351 co-relation queries the response was YES. [2023-01-28 02:46:17,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 1174 events. 536/1174 cut-off events. For 9351/9351 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7459 event pairs, 94 based on Foata normal form. 14/1186 useless extension candidates. Maximal degree in co-relation 6741. Up to 633 conditions per place. [2023-01-28 02:46:17,580 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 169 selfloop transitions, 99 changer transitions 22/290 dead transitions. [2023-01-28 02:46:17,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3711 flow [2023-01-28 02:46:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 02:46:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 02:46:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3638 transitions. [2023-01-28 02:46:17,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32366548042704624 [2023-01-28 02:46:17,584 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3638 transitions. [2023-01-28 02:46:17,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3638 transitions. [2023-01-28 02:46:17,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:17,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3638 transitions. [2023-01-28 02:46:17,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 181.9) internal successors, (3638), 20 states have internal predecessors, (3638), 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 02:46:17,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 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 02:46:17,592 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 562.0) internal successors, (11802), 21 states have internal predecessors, (11802), 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 02:46:17,592 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 2317 flow. Second operand 20 states and 3638 transitions. [2023-01-28 02:46:17,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3711 flow [2023-01-28 02:46:17,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 290 transitions, 3528 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-01-28 02:46:17,628 INFO L231 Difference]: Finished difference. Result has 185 places, 217 transitions, 2730 flow [2023-01-28 02:46:17,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2730, PETRI_PLACES=185, PETRI_TRANSITIONS=217} [2023-01-28 02:46:17,629 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-01-28 02:46:17,629 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 217 transitions, 2730 flow [2023-01-28 02:46:17,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 178.1304347826087) internal successors, (4097), 23 states have internal predecessors, (4097), 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 02:46:17,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:17,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:17,634 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 02:46:17,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:17,834 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:17,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:17,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1290945382, now seen corresponding path program 7 times [2023-01-28 02:46:17,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:17,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298948121] [2023-01-28 02:46:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:17,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:18,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298948121] [2023-01-28 02:46:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298948121] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241042610] [2023-01-28 02:46:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:46:18,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:18,455 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 02:46:18,484 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 02:46:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 02:46:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:18,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 117 [2023-01-28 02:46:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:18,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:19,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:19,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 184 [2023-01-28 02:46:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:20,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241042610] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:20,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:20,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-28 02:46:20,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113501102] [2023-01-28 02:46:20,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:20,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:46:20,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:46:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:46:20,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:46:20,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 217 transitions, 2730 flow. Second operand has 21 states, 21 states have (on average 177.9047619047619) internal successors, (3736), 21 states have internal predecessors, (3736), 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 02:46:20,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:20,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:46:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:22,730 INFO L130 PetriNetUnfolder]: 729/1682 cut-off events. [2023-01-28 02:46:22,730 INFO L131 PetriNetUnfolder]: For 15656/15656 co-relation queries the response was YES. [2023-01-28 02:46:22,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10298 conditions, 1682 events. 729/1682 cut-off events. For 15656/15656 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12084 event pairs, 71 based on Foata normal form. 9/1689 useless extension candidates. Maximal degree in co-relation 10220. Up to 433 conditions per place. [2023-01-28 02:46:22,742 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 180 selfloop transitions, 187 changer transitions 24/391 dead transitions. [2023-01-28 02:46:22,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 391 transitions, 5330 flow [2023-01-28 02:46:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 02:46:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 02:46:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4898 transitions. [2023-01-28 02:46:22,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32278898115197047 [2023-01-28 02:46:22,746 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4898 transitions. [2023-01-28 02:46:22,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4898 transitions. [2023-01-28 02:46:22,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:22,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4898 transitions. [2023-01-28 02:46:22,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 181.40740740740742) internal successors, (4898), 27 states have internal predecessors, (4898), 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 02:46:22,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 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 02:46:22,758 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 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 02:46:22,758 INFO L175 Difference]: Start difference. First operand has 185 places, 217 transitions, 2730 flow. Second operand 27 states and 4898 transitions. [2023-01-28 02:46:22,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 391 transitions, 5330 flow [2023-01-28 02:46:22,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 391 transitions, 5136 flow, removed 92 selfloop flow, removed 7 redundant places. [2023-01-28 02:46:22,842 INFO L231 Difference]: Finished difference. Result has 214 places, 289 transitions, 4361 flow [2023-01-28 02:46:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4361, PETRI_PLACES=214, PETRI_TRANSITIONS=289} [2023-01-28 02:46:22,842 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-01-28 02:46:22,842 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 289 transitions, 4361 flow [2023-01-28 02:46:22,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 177.9047619047619) internal successors, (3736), 21 states have internal predecessors, (3736), 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 02:46:22,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:22,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:22,849 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 02:46:23,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 02:46:23,047 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:23,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash 781489274, now seen corresponding path program 8 times [2023-01-28 02:46:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580376069] [2023-01-28 02:46:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:23,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580376069] [2023-01-28 02:46:23,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580376069] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:23,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675847919] [2023-01-28 02:46:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:46:23,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:23,552 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 02:46:23,553 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 02:46:23,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:46:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:46:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:23,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 91 [2023-01-28 02:46:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:24,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:25,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:25,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 248 [2023-01-28 02:46:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:25,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675847919] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:25,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:25,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-28 02:46:25,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253865738] [2023-01-28 02:46:25,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:25,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 02:46:25,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 02:46:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-01-28 02:46:25,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:46:25,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 289 transitions, 4361 flow. Second operand has 20 states, 20 states have (on average 177.95) internal successors, (3559), 20 states have internal predecessors, (3559), 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 02:46:25,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:25,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:46:25,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:26,997 INFO L130 PetriNetUnfolder]: 712/1628 cut-off events. [2023-01-28 02:46:26,997 INFO L131 PetriNetUnfolder]: For 17124/17124 co-relation queries the response was YES. [2023-01-28 02:46:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10794 conditions, 1628 events. 712/1628 cut-off events. For 17124/17124 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11401 event pairs, 142 based on Foata normal form. 4/1632 useless extension candidates. Maximal degree in co-relation 10706. Up to 755 conditions per place. [2023-01-28 02:46:27,007 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 203 selfloop transitions, 122 changer transitions 15/340 dead transitions. [2023-01-28 02:46:27,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 340 transitions, 5390 flow [2023-01-28 02:46:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:46:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:46:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3080 transitions. [2023-01-28 02:46:27,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32237806154490267 [2023-01-28 02:46:27,010 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3080 transitions. [2023-01-28 02:46:27,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3080 transitions. [2023-01-28 02:46:27,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:27,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3080 transitions. [2023-01-28 02:46:27,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 181.1764705882353) internal successors, (3080), 17 states have internal predecessors, (3080), 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 02:46:27,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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 02:46:27,017 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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 02:46:27,017 INFO L175 Difference]: Start difference. First operand has 214 places, 289 transitions, 4361 flow. Second operand 17 states and 3080 transitions. [2023-01-28 02:46:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 340 transitions, 5390 flow [2023-01-28 02:46:27,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 340 transitions, 4619 flow, removed 335 selfloop flow, removed 13 redundant places. [2023-01-28 02:46:27,137 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 3899 flow [2023-01-28 02:46:27,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3899, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2023-01-28 02:46:27,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 194 predicate places. [2023-01-28 02:46:27,138 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 3899 flow [2023-01-28 02:46:27,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 177.95) internal successors, (3559), 20 states have internal predecessors, (3559), 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 02:46:27,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:27,138 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:27,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 02:46:27,340 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,SelfDestructingSolverStorable24 [2023-01-28 02:46:27,341 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:27,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 854566266, now seen corresponding path program 9 times [2023-01-28 02:46:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290401670] [2023-01-28 02:46:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:27,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:27,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:27,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290401670] [2023-01-28 02:46:27,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290401670] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:27,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849764166] [2023-01-28 02:46:27,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:46:27,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:27,948 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 02:46:27,948 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 02:46:28,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:46:28,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 02:46:28,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:46:28,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2023-01-28 02:46:28,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 104 [2023-01-28 02:46:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:28,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:30,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:30,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 276 [2023-01-28 02:46:30,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 181 [2023-01-28 02:46:30,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 179 [2023-01-28 02:46:30,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 177 [2023-01-28 02:46:30,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 175 [2023-01-28 02:46:30,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 173 [2023-01-28 02:46:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:30,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849764166] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:30,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:30,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-28 02:46:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662084253] [2023-01-28 02:46:30,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:30,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:46:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:46:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=661, Unknown=4, NotChecked=0, Total=756 [2023-01-28 02:46:30,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-01-28 02:46:30,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 3899 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 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 02:46:30,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:30,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-01-28 02:46:30,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:32,232 INFO L130 PetriNetUnfolder]: 812/1860 cut-off events. [2023-01-28 02:46:32,233 INFO L131 PetriNetUnfolder]: For 14241/14241 co-relation queries the response was YES. [2023-01-28 02:46:32,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10934 conditions, 1860 events. 812/1860 cut-off events. For 14241/14241 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13453 event pairs, 178 based on Foata normal form. 5/1865 useless extension candidates. Maximal degree in co-relation 10851. Up to 824 conditions per place. [2023-01-28 02:46:32,243 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 183 selfloop transitions, 156 changer transitions 14/353 dead transitions. [2023-01-28 02:46:32,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 353 transitions, 5316 flow [2023-01-28 02:46:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 02:46:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 02:46:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2135 transitions. [2023-01-28 02:46:32,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165776986951364 [2023-01-28 02:46:32,245 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2135 transitions. [2023-01-28 02:46:32,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2135 transitions. [2023-01-28 02:46:32,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:32,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2135 transitions. [2023-01-28 02:46:32,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 177.91666666666666) internal successors, (2135), 12 states have internal predecessors, (2135), 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 02:46:32,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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 02:46:32,251 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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 02:46:32,251 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 3899 flow. Second operand 12 states and 2135 transitions. [2023-01-28 02:46:32,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 353 transitions, 5316 flow [2023-01-28 02:46:32,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 5058 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-01-28 02:46:32,331 INFO L231 Difference]: Finished difference. Result has 216 places, 304 transitions, 4374 flow [2023-01-28 02:46:32,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4374, PETRI_PLACES=216, PETRI_TRANSITIONS=304} [2023-01-28 02:46:32,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2023-01-28 02:46:32,332 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 304 transitions, 4374 flow [2023-01-28 02:46:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 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 02:46:32,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:32,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:32,337 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 02:46:32,533 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,SelfDestructingSolverStorable25 [2023-01-28 02:46:32,533 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:32,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1888333352, now seen corresponding path program 10 times [2023-01-28 02:46:32,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:32,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549704696] [2023-01-28 02:46:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:32,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:33,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:33,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549704696] [2023-01-28 02:46:33,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549704696] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:33,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385009443] [2023-01-28 02:46:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:46:33,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:33,150 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 02:46:33,152 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 02:46:33,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:46:33,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 02:46:33,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:46:33,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2023-01-28 02:46:33,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 110 [2023-01-28 02:46:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:33,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:34,995 WARN L839 $PredicateComparison]: unable to prove that (or (= c_~name_1~0 c_~name_2~0) (let ((.cse0 (forall ((v_ArrVal_748 (Array Int Int))) (not (= c_~name_1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset))))) (.cse1 (< c_~i_4~0 3))) (and (or .cse0 (< 0 c_~result_3~0)) (or (and (< c_~result_3~0 0) (or (< (+ 2147483647 c_~name_2~0) c_~name_1~0) (< c_~name_1~0 c_~name_2~0) .cse1)) (forall ((v_ArrVal_748 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_748) c_~nondet_0~0.base) c_~nondet_0~0.offset) c_~name_2~0)))) (or .cse0 (< c_~name_2~0 c_~name_1~0) (< (+ c_~name_1~0 2147483648) c_~name_2~0) .cse1)))) is different from false [2023-01-28 02:46:35,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:35,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 145 [2023-01-28 02:46:35,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 92 [2023-01-28 02:46:35,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 90 [2023-01-28 02:46:35,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 88 [2023-01-28 02:46:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385009443] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:35,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:35,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-01-28 02:46:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906233256] [2023-01-28 02:46:35,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:35,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:46:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:46:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=618, Unknown=1, NotChecked=50, Total=756 [2023-01-28 02:46:35,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 562 [2023-01-28 02:46:35,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 304 transitions, 4374 flow. Second operand has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 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 02:46:35,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:35,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 562 [2023-01-28 02:46:35,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:37,394 INFO L130 PetriNetUnfolder]: 810/1873 cut-off events. [2023-01-28 02:46:37,394 INFO L131 PetriNetUnfolder]: For 15319/15319 co-relation queries the response was YES. [2023-01-28 02:46:37,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 1873 events. 810/1873 cut-off events. For 15319/15319 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13750 event pairs, 167 based on Foata normal form. 35/1908 useless extension candidates. Maximal degree in co-relation 11128. Up to 771 conditions per place. [2023-01-28 02:46:37,406 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 225 selfloop transitions, 142 changer transitions 25/392 dead transitions. [2023-01-28 02:46:37,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 392 transitions, 5972 flow [2023-01-28 02:46:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 02:46:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 02:46:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2856 transitions. [2023-01-28 02:46:37,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761565836298933 [2023-01-28 02:46:37,409 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2856 transitions. [2023-01-28 02:46:37,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2856 transitions. [2023-01-28 02:46:37,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:37,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2856 transitions. [2023-01-28 02:46:37,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 178.5) internal successors, (2856), 16 states have internal predecessors, (2856), 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 02:46:37,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 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 02:46:37,415 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 562.0) internal successors, (9554), 17 states have internal predecessors, (9554), 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 02:46:37,416 INFO L175 Difference]: Start difference. First operand has 216 places, 304 transitions, 4374 flow. Second operand 16 states and 2856 transitions. [2023-01-28 02:46:37,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 392 transitions, 5972 flow [2023-01-28 02:46:37,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 392 transitions, 5854 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-01-28 02:46:37,515 INFO L231 Difference]: Finished difference. Result has 232 places, 315 transitions, 4888 flow [2023-01-28 02:46:37,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4888, PETRI_PLACES=232, PETRI_TRANSITIONS=315} [2023-01-28 02:46:37,516 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-01-28 02:46:37,516 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 315 transitions, 4888 flow [2023-01-28 02:46:37,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.75) internal successors, (4865), 28 states have internal predecessors, (4865), 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 02:46:37,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:37,516 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:37,523 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 02:46:37,721 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,SelfDestructingSolverStorable26 [2023-01-28 02:46:37,722 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:37,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:37,722 INFO L85 PathProgramCache]: Analyzing trace with hash 869721443, now seen corresponding path program 11 times [2023-01-28 02:46:37,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:37,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824061432] [2023-01-28 02:46:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:37,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:38,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824061432] [2023-01-28 02:46:38,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824061432] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:38,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395229980] [2023-01-28 02:46:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:46:38,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:38,079 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 02:46:38,080 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 02:46:38,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:46:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:46:38,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:38,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-01-28 02:46:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:38,540 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 02:46:38,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2023-01-28 02:46:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395229980] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:38,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:38,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:46:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549479324] [2023-01-28 02:46:38,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:46:38,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:46:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:46:38,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:46:38,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 315 transitions, 4888 flow. Second operand has 18 states, 18 states have (on average 187.33333333333334) internal successors, (3372), 18 states have internal predecessors, (3372), 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 02:46:38,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:38,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:46:38,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:39,294 INFO L130 PetriNetUnfolder]: 800/1792 cut-off events. [2023-01-28 02:46:39,294 INFO L131 PetriNetUnfolder]: For 17105/17105 co-relation queries the response was YES. [2023-01-28 02:46:39,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 1792 events. 800/1792 cut-off events. For 17105/17105 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12587 event pairs, 88 based on Foata normal form. 16/1808 useless extension candidates. Maximal degree in co-relation 11550. Up to 368 conditions per place. [2023-01-28 02:46:39,306 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 253 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2023-01-28 02:46:39,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 385 transitions, 6365 flow [2023-01-28 02:46:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:46:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:46:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2487 transitions. [2023-01-28 02:46:39,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404051464549685 [2023-01-28 02:46:39,319 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2487 transitions. [2023-01-28 02:46:39,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2487 transitions. [2023-01-28 02:46:39,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:39,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2487 transitions. [2023-01-28 02:46:39,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 191.30769230769232) internal successors, (2487), 13 states have internal predecessors, (2487), 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 02:46:39,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:46:39,328 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:46:39,328 INFO L175 Difference]: Start difference. First operand has 232 places, 315 transitions, 4888 flow. Second operand 13 states and 2487 transitions. [2023-01-28 02:46:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 385 transitions, 6365 flow [2023-01-28 02:46:39,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 385 transitions, 6137 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-01-28 02:46:39,432 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 5088 flow [2023-01-28 02:46:39,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4685, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5088, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2023-01-28 02:46:39,437 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 216 predicate places. [2023-01-28 02:46:39,437 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 5088 flow [2023-01-28 02:46:39,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.33333333333334) internal successors, (3372), 18 states have internal predecessors, (3372), 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 02:46:39,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:39,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:39,442 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 02:46:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:39,642 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:39,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -780460431, now seen corresponding path program 12 times [2023-01-28 02:46:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:39,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528082519] [2023-01-28 02:46:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:46:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:40,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528082519] [2023-01-28 02:46:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528082519] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:40,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025603076] [2023-01-28 02:46:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:46:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:40,223 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 02:46:40,225 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 02:46:40,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:46:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:46:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:40,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-01-28 02:46:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:40,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:40,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:40,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-01-28 02:46:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:40,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025603076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:40,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:40,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-01-28 02:46:40,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564337335] [2023-01-28 02:46:40,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:40,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:46:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:46:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:46:40,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 562 [2023-01-28 02:46:40,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 5088 flow. Second operand has 23 states, 23 states have (on average 171.1304347826087) internal successors, (3936), 23 states have internal predecessors, (3936), 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 02:46:40,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:40,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 562 [2023-01-28 02:46:40,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:42,207 INFO L130 PetriNetUnfolder]: 1642/3655 cut-off events. [2023-01-28 02:46:42,207 INFO L131 PetriNetUnfolder]: For 34715/34715 co-relation queries the response was YES. [2023-01-28 02:46:42,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23751 conditions, 3655 events. 1642/3655 cut-off events. For 34715/34715 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29456 event pairs, 323 based on Foata normal form. 34/3689 useless extension candidates. Maximal degree in co-relation 23450. Up to 1002 conditions per place. [2023-01-28 02:46:42,233 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 538 selfloop transitions, 200 changer transitions 1/739 dead transitions. [2023-01-28 02:46:42,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 739 transitions, 12566 flow [2023-01-28 02:46:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:46:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:46:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3857 transitions. [2023-01-28 02:46:42,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31195406017470073 [2023-01-28 02:46:42,237 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3857 transitions. [2023-01-28 02:46:42,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3857 transitions. [2023-01-28 02:46:42,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:42,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3857 transitions. [2023-01-28 02:46:42,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 175.3181818181818) internal successors, (3857), 22 states have internal predecessors, (3857), 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 02:46:42,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 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 02:46:42,246 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 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 02:46:42,246 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 5088 flow. Second operand 22 states and 3857 transitions. [2023-01-28 02:46:42,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 739 transitions, 12566 flow [2023-01-28 02:46:42,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 739 transitions, 12386 flow, removed 28 selfloop flow, removed 7 redundant places. [2023-01-28 02:46:42,502 INFO L231 Difference]: Finished difference. Result has 261 places, 437 transitions, 7906 flow [2023-01-28 02:46:42,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7906, PETRI_PLACES=261, PETRI_TRANSITIONS=437} [2023-01-28 02:46:42,503 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-01-28 02:46:42,503 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 437 transitions, 7906 flow [2023-01-28 02:46:42,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 171.1304347826087) internal successors, (3936), 23 states have internal predecessors, (3936), 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 02:46:42,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:42,503 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:42,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-28 02:46:42,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 02:46:42,705 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:42,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1335210813, now seen corresponding path program 13 times [2023-01-28 02:46:42,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:42,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339006281] [2023-01-28 02:46:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:42,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339006281] [2023-01-28 02:46:43,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339006281] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899315538] [2023-01-28 02:46:43,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:46:43,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:43,160 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 02:46:43,162 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 02:46:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:46:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:43,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-01-28 02:46:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:43,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:43,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:43,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-01-28 02:46:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899315538] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:43,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:43,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-01-28 02:46:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244485486] [2023-01-28 02:46:43,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:43,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 02:46:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 02:46:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-01-28 02:46:43,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:46:43,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 437 transitions, 7906 flow. Second operand has 19 states, 19 states have (on average 178.1578947368421) internal successors, (3385), 19 states have internal predecessors, (3385), 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 02:46:43,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:43,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:46:43,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:45,227 INFO L130 PetriNetUnfolder]: 1660/3697 cut-off events. [2023-01-28 02:46:45,227 INFO L131 PetriNetUnfolder]: For 40990/40990 co-relation queries the response was YES. [2023-01-28 02:46:45,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24822 conditions, 3697 events. 1660/3697 cut-off events. For 40990/40990 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30131 event pairs, 377 based on Foata normal form. 8/3705 useless extension candidates. Maximal degree in co-relation 24454. Up to 1254 conditions per place. [2023-01-28 02:46:45,252 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 288 selfloop transitions, 209 changer transitions 3/500 dead transitions. [2023-01-28 02:46:45,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 500 transitions, 9491 flow [2023-01-28 02:46:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:46:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:46:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3088 transitions. [2023-01-28 02:46:45,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323215407159305 [2023-01-28 02:46:45,255 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3088 transitions. [2023-01-28 02:46:45,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3088 transitions. [2023-01-28 02:46:45,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:45,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3088 transitions. [2023-01-28 02:46:45,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 181.64705882352942) internal successors, (3088), 17 states have internal predecessors, (3088), 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 02:46:45,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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 02:46:45,262 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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 02:46:45,262 INFO L175 Difference]: Start difference. First operand has 261 places, 437 transitions, 7906 flow. Second operand 17 states and 3088 transitions. [2023-01-28 02:46:45,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 500 transitions, 9491 flow [2023-01-28 02:46:45,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 500 transitions, 9448 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-01-28 02:46:45,559 INFO L231 Difference]: Finished difference. Result has 276 places, 440 transitions, 8445 flow [2023-01-28 02:46:45,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7829, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8445, PETRI_PLACES=276, PETRI_TRANSITIONS=440} [2023-01-28 02:46:45,560 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 255 predicate places. [2023-01-28 02:46:45,560 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 440 transitions, 8445 flow [2023-01-28 02:46:45,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 178.1578947368421) internal successors, (3385), 19 states have internal predecessors, (3385), 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 02:46:45,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:45,561 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:45,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 02:46:45,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:45,762 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:45,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1635767085, now seen corresponding path program 14 times [2023-01-28 02:46:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235543197] [2023-01-28 02:46:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:46,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:46,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235543197] [2023-01-28 02:46:46,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235543197] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:46,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746639184] [2023-01-28 02:46:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:46:46,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:46,077 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 02:46:46,079 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 02:46:46,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:46:46,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:46,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 02:46:46,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:46,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-01-28 02:46:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:46,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:46,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:46,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-01-28 02:46:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746639184] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:46,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:46,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-28 02:46:46,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81775097] [2023-01-28 02:46:46,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:46,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 02:46:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 02:46:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:46:46,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:46:46,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 440 transitions, 8445 flow. Second operand has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 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 02:46:46,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:46,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:46:46,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:47,948 INFO L130 PetriNetUnfolder]: 1666/3695 cut-off events. [2023-01-28 02:46:47,948 INFO L131 PetriNetUnfolder]: For 45512/45512 co-relation queries the response was YES. [2023-01-28 02:46:47,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25608 conditions, 3695 events. 1666/3695 cut-off events. For 45512/45512 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29995 event pairs, 375 based on Foata normal form. 12/3707 useless extension candidates. Maximal degree in co-relation 25502. Up to 1278 conditions per place. [2023-01-28 02:46:47,976 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 304 selfloop transitions, 195 changer transitions 0/499 dead transitions. [2023-01-28 02:46:47,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 499 transitions, 9958 flow [2023-01-28 02:46:47,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:46:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:46:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2678 transitions. [2023-01-28 02:46:47,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403660396542959 [2023-01-28 02:46:47,979 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2678 transitions. [2023-01-28 02:46:47,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2678 transitions. [2023-01-28 02:46:47,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:47,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2678 transitions. [2023-01-28 02:46:47,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 191.28571428571428) internal successors, (2678), 14 states have internal predecessors, (2678), 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 02:46:47,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:46:47,985 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:46:47,985 INFO L175 Difference]: Start difference. First operand has 276 places, 440 transitions, 8445 flow. Second operand 14 states and 2678 transitions. [2023-01-28 02:46:47,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 499 transitions, 9958 flow [2023-01-28 02:46:48,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 9783 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-01-28 02:46:48,384 INFO L231 Difference]: Finished difference. Result has 278 places, 444 transitions, 8751 flow [2023-01-28 02:46:48,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8751, PETRI_PLACES=278, PETRI_TRANSITIONS=444} [2023-01-28 02:46:48,385 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-28 02:46:48,385 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 444 transitions, 8751 flow [2023-01-28 02:46:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.23529411764707) internal successors, (3183), 17 states have internal predecessors, (3183), 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 02:46:48,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:48,386 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:48,394 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 02:46:48,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:48,589 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:48,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2050404756, now seen corresponding path program 15 times [2023-01-28 02:46:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026664575] [2023-01-28 02:46:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:46:49,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026664575] [2023-01-28 02:46:49,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026664575] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637183233] [2023-01-28 02:46:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:46:49,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:49,103 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 02:46:49,105 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 02:46:49,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 02:46:49,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:46:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:49,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-01-28 02:46:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:49,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:49,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:49,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 47 [2023-01-28 02:46:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637183233] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:49,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:49,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-01-28 02:46:49,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517573689] [2023-01-28 02:46:49,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:49,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:46:49,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:49,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:46:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:46:49,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 562 [2023-01-28 02:46:49,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 444 transitions, 8751 flow. Second operand has 23 states, 23 states have (on average 170.95652173913044) internal successors, (3932), 23 states have internal predecessors, (3932), 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 02:46:49,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:49,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 562 [2023-01-28 02:46:49,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:51,318 INFO L130 PetriNetUnfolder]: 1654/3651 cut-off events. [2023-01-28 02:46:51,318 INFO L131 PetriNetUnfolder]: For 48293/48293 co-relation queries the response was YES. [2023-01-28 02:46:51,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25810 conditions, 3651 events. 1654/3651 cut-off events. For 48293/48293 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29318 event pairs, 267 based on Foata normal form. 24/3675 useless extension candidates. Maximal degree in co-relation 25704. Up to 691 conditions per place. [2023-01-28 02:46:51,343 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 460 selfloop transitions, 259 changer transitions 2/721 dead transitions. [2023-01-28 02:46:51,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 721 transitions, 13789 flow [2023-01-28 02:46:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 02:46:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 02:46:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4870 transitions. [2023-01-28 02:46:51,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30948144382308085 [2023-01-28 02:46:51,349 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4870 transitions. [2023-01-28 02:46:51,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4870 transitions. [2023-01-28 02:46:51,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:51,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4870 transitions. [2023-01-28 02:46:51,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 173.92857142857142) internal successors, (4870), 28 states have internal predecessors, (4870), 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 02:46:51,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 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 02:46:51,359 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 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 02:46:51,359 INFO L175 Difference]: Start difference. First operand has 278 places, 444 transitions, 8751 flow. Second operand 28 states and 4870 transitions. [2023-01-28 02:46:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 721 transitions, 13789 flow [2023-01-28 02:46:51,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 721 transitions, 13367 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-01-28 02:46:51,710 INFO L231 Difference]: Finished difference. Result has 294 places, 515 transitions, 10243 flow [2023-01-28 02:46:51,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10243, PETRI_PLACES=294, PETRI_TRANSITIONS=515} [2023-01-28 02:46:51,710 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-01-28 02:46:51,711 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 515 transitions, 10243 flow [2023-01-28 02:46:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 170.95652173913044) internal successors, (3932), 23 states have internal predecessors, (3932), 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 02:46:51,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:51,711 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:51,716 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 02:46:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:51,912 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:51,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1594385250, now seen corresponding path program 16 times [2023-01-28 02:46:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:51,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474599318] [2023-01-28 02:46:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:46:52,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:52,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474599318] [2023-01-28 02:46:52,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474599318] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318861431] [2023-01-28 02:46:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:46:52,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:52,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:52,439 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 02:46:52,441 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 02:46:52,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:46:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:46:52,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:52,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 48 [2023-01-28 02:46:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:52,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:53,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:53,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 69 [2023-01-28 02:46:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:53,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318861431] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:53,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-01-28 02:46:53,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200175472] [2023-01-28 02:46:53,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:53,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:46:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:46:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:46:53,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-28 02:46:53,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 515 transitions, 10243 flow. Second operand has 24 states, 24 states have (on average 175.0) internal successors, (4200), 24 states have internal predecessors, (4200), 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 02:46:53,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:53,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-28 02:46:53,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:54,285 INFO L130 PetriNetUnfolder]: 1610/3547 cut-off events. [2023-01-28 02:46:54,285 INFO L131 PetriNetUnfolder]: For 49090/49090 co-relation queries the response was YES. [2023-01-28 02:46:54,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 3547 events. 1610/3547 cut-off events. For 49090/49090 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28326 event pairs, 721 based on Foata normal form. 8/3555 useless extension candidates. Maximal degree in co-relation 25418. Up to 3296 conditions per place. [2023-01-28 02:46:54,319 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 433 selfloop transitions, 82 changer transitions 10/525 dead transitions. [2023-01-28 02:46:54,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 525 transitions, 11303 flow [2023-01-28 02:46:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 02:46:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 02:46:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1951 transitions. [2023-01-28 02:46:54,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155936590100291 [2023-01-28 02:46:54,322 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1951 transitions. [2023-01-28 02:46:54,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1951 transitions. [2023-01-28 02:46:54,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:54,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1951 transitions. [2023-01-28 02:46:54,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.36363636363637) internal successors, (1951), 11 states have internal predecessors, (1951), 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 02:46:54,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:46:54,326 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:46:54,326 INFO L175 Difference]: Start difference. First operand has 294 places, 515 transitions, 10243 flow. Second operand 11 states and 1951 transitions. [2023-01-28 02:46:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 525 transitions, 11303 flow [2023-01-28 02:46:54,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 525 transitions, 11051 flow, removed 37 selfloop flow, removed 16 redundant places. [2023-01-28 02:46:54,694 INFO L231 Difference]: Finished difference. Result has 288 places, 505 transitions, 9993 flow [2023-01-28 02:46:54,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9993, PETRI_PLACES=288, PETRI_TRANSITIONS=505} [2023-01-28 02:46:54,694 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-01-28 02:46:54,694 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 505 transitions, 9993 flow [2023-01-28 02:46:54,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 175.0) internal successors, (4200), 24 states have internal predecessors, (4200), 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 02:46:54,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:54,695 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:54,699 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 02:46:54,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:54,895 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:54,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash -86174668, now seen corresponding path program 17 times [2023-01-28 02:46:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:54,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817543203] [2023-01-28 02:46:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:54,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:55,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:55,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817543203] [2023-01-28 02:46:55,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817543203] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:55,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548273745] [2023-01-28 02:46:55,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:46:55,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:55,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:55,194 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 02:46:55,196 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 02:46:55,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:46:55,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 02:46:55,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:55,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 46 [2023-01-28 02:46:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:55,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:55,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:55,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 42 [2023-01-28 02:46:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548273745] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:55,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:46:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063135267] [2023-01-28 02:46:55,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:46:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:46:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:46:55,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:46:55,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 505 transitions, 9993 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 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 02:46:55,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:55,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:46:55,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:56,993 INFO L130 PetriNetUnfolder]: 1664/3685 cut-off events. [2023-01-28 02:46:56,993 INFO L131 PetriNetUnfolder]: For 49457/49457 co-relation queries the response was YES. [2023-01-28 02:46:57,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26534 conditions, 3685 events. 1664/3685 cut-off events. For 49457/49457 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29781 event pairs, 267 based on Foata normal form. 16/3701 useless extension candidates. Maximal degree in co-relation 26427. Up to 1161 conditions per place. [2023-01-28 02:46:57,020 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 297 selfloop transitions, 265 changer transitions 1/563 dead transitions. [2023-01-28 02:46:57,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 563 transitions, 11867 flow [2023-01-28 02:46:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 02:46:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 02:46:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2291 transitions. [2023-01-28 02:46:57,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33970937129300116 [2023-01-28 02:46:57,022 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2291 transitions. [2023-01-28 02:46:57,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2291 transitions. [2023-01-28 02:46:57,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:57,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2291 transitions. [2023-01-28 02:46:57,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.91666666666666) internal successors, (2291), 12 states have internal predecessors, (2291), 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 02:46:57,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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 02:46:57,027 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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 02:46:57,027 INFO L175 Difference]: Start difference. First operand has 288 places, 505 transitions, 9993 flow. Second operand 12 states and 2291 transitions. [2023-01-28 02:46:57,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 563 transitions, 11867 flow [2023-01-28 02:46:57,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 563 transitions, 11697 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-01-28 02:46:57,377 INFO L231 Difference]: Finished difference. Result has 285 places, 520 transitions, 10782 flow [2023-01-28 02:46:57,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9739, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10782, PETRI_PLACES=285, PETRI_TRANSITIONS=520} [2023-01-28 02:46:57,378 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-01-28 02:46:57,378 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 520 transitions, 10782 flow [2023-01-28 02:46:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 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 02:46:57,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:57,378 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:57,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 02:46:57,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-28 02:46:57,581 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:46:57,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash 450395604, now seen corresponding path program 18 times [2023-01-28 02:46:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:57,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417071945] [2023-01-28 02:46:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:57,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:57,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:57,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417071945] [2023-01-28 02:46:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417071945] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:57,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536649020] [2023-01-28 02:46:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:46:57,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:57,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:57,885 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 02:46:57,886 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 02:46:58,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:46:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:46:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:58,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-01-28 02:46:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:58,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:58,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:58,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 02:46:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:58,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536649020] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:58,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:58,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-28 02:46:58,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808596562] [2023-01-28 02:46:58,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:58,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 02:46:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 02:46:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-01-28 02:46:58,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:46:58,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 520 transitions, 10782 flow. Second operand has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 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 02:46:58,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:58,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:46:58,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:59,530 INFO L130 PetriNetUnfolder]: 1620/3545 cut-off events. [2023-01-28 02:46:59,531 INFO L131 PetriNetUnfolder]: For 53008/53008 co-relation queries the response was YES. [2023-01-28 02:46:59,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26476 conditions, 3545 events. 1620/3545 cut-off events. For 53008/53008 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28137 event pairs, 733 based on Foata normal form. 20/3565 useless extension candidates. Maximal degree in co-relation 26369. Up to 3315 conditions per place. [2023-01-28 02:46:59,556 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 440 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2023-01-28 02:46:59,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 522 transitions, 11724 flow [2023-01-28 02:46:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:46:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:46:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1520 transitions. [2023-01-28 02:46:59,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-28 02:46:59,558 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1520 transitions. [2023-01-28 02:46:59,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1520 transitions. [2023-01-28 02:46:59,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:59,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1520 transitions. [2023-01-28 02:46:59,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 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 02:46:59,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 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 02:46:59,561 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 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 02:46:59,561 INFO L175 Difference]: Start difference. First operand has 285 places, 520 transitions, 10782 flow. Second operand 8 states and 1520 transitions. [2023-01-28 02:46:59,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 522 transitions, 11724 flow [2023-01-28 02:46:59,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 522 transitions, 11255 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-01-28 02:46:59,885 INFO L231 Difference]: Finished difference. Result has 283 places, 512 transitions, 10327 flow [2023-01-28 02:46:59,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10033, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10327, PETRI_PLACES=283, PETRI_TRANSITIONS=512} [2023-01-28 02:46:59,886 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-01-28 02:46:59,886 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 512 transitions, 10327 flow [2023-01-28 02:46:59,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 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 02:46:59,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:59,887 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:46:59,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-28 02:47:00,087 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:00,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash 801329013, now seen corresponding path program 19 times [2023-01-28 02:47:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852835149] [2023-01-28 02:47:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:00,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:00,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:00,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852835149] [2023-01-28 02:47:00,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852835149] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:00,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195903320] [2023-01-28 02:47:00,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:47:00,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:00,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:00,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:00,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 02:47:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:47:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:00,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-01-28 02:47:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:00,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:00,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2023-01-28 02:47:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195903320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:00,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:00,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:47:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296773876] [2023-01-28 02:47:00,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:47:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:47:00,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:47:00,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:00,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 512 transitions, 10327 flow. Second operand has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 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 02:47:00,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:00,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:00,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:01,937 INFO L130 PetriNetUnfolder]: 1608/3501 cut-off events. [2023-01-28 02:47:01,937 INFO L131 PetriNetUnfolder]: For 49239/49239 co-relation queries the response was YES. [2023-01-28 02:47:01,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 3501 events. 1608/3501 cut-off events. For 49239/49239 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27571 event pairs, 463 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25599. Up to 2377 conditions per place. [2023-01-28 02:47:01,966 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 372 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2023-01-28 02:47:01,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 527 transitions, 11368 flow [2023-01-28 02:47:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 02:47:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 02:47:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2090 transitions. [2023-01-28 02:47:01,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-28 02:47:01,969 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2090 transitions. [2023-01-28 02:47:01,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2090 transitions. [2023-01-28 02:47:01,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:01,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2090 transitions. [2023-01-28 02:47:01,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.0) internal successors, (2090), 11 states have internal predecessors, (2090), 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 02:47:01,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:47:01,973 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:47:01,973 INFO L175 Difference]: Start difference. First operand has 283 places, 512 transitions, 10327 flow. Second operand 11 states and 2090 transitions. [2023-01-28 02:47:01,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 527 transitions, 11368 flow [2023-01-28 02:47:02,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 527 transitions, 11235 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-01-28 02:47:02,312 INFO L231 Difference]: Finished difference. Result has 286 places, 508 transitions, 10428 flow [2023-01-28 02:47:02,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10118, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10428, PETRI_PLACES=286, PETRI_TRANSITIONS=508} [2023-01-28 02:47:02,313 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2023-01-28 02:47:02,313 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 508 transitions, 10428 flow [2023-01-28 02:47:02,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 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 02:47:02,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:02,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:02,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:02,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:02,514 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:02,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1868073493, now seen corresponding path program 20 times [2023-01-28 02:47:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168885023] [2023-01-28 02:47:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:47:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168885023] [2023-01-28 02:47:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168885023] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078519722] [2023-01-28 02:47:02,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:47:02,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:02,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:02,986 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:02,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 02:47:03,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:47:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:03,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-01-28 02:47:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:03,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:03,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:03,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 02:47:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:03,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078519722] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:03,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:03,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2023-01-28 02:47:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87547666] [2023-01-28 02:47:03,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:47:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:47:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-01-28 02:47:03,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-28 02:47:03,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 508 transitions, 10428 flow. Second operand has 23 states, 23 states have (on average 174.91304347826087) internal successors, (4023), 23 states have internal predecessors, (4023), 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 02:47:03,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:03,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-28 02:47:03,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:04,939 INFO L130 PetriNetUnfolder]: 1658/3639 cut-off events. [2023-01-28 02:47:04,939 INFO L131 PetriNetUnfolder]: For 54497/54497 co-relation queries the response was YES. [2023-01-28 02:47:04,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27126 conditions, 3639 events. 1658/3639 cut-off events. For 54497/54497 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29189 event pairs, 639 based on Foata normal form. 16/3655 useless extension candidates. Maximal degree in co-relation 27019. Up to 3084 conditions per place. [2023-01-28 02:47:04,980 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 458 selfloop transitions, 108 changer transitions 0/566 dead transitions. [2023-01-28 02:47:04,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 566 transitions, 12091 flow [2023-01-28 02:47:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:47:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:47:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2502 transitions. [2023-01-28 02:47:04,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31799694966954756 [2023-01-28 02:47:04,983 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2502 transitions. [2023-01-28 02:47:04,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2502 transitions. [2023-01-28 02:47:04,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:04,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2502 transitions. [2023-01-28 02:47:04,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 178.71428571428572) internal successors, (2502), 14 states have internal predecessors, (2502), 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 02:47:04,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:47:04,988 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:47:04,988 INFO L175 Difference]: Start difference. First operand has 286 places, 508 transitions, 10428 flow. Second operand 14 states and 2502 transitions. [2023-01-28 02:47:04,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 566 transitions, 12091 flow [2023-01-28 02:47:05,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 566 transitions, 11893 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-01-28 02:47:05,363 INFO L231 Difference]: Finished difference. Result has 292 places, 518 transitions, 10716 flow [2023-01-28 02:47:05,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10162, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10716, PETRI_PLACES=292, PETRI_TRANSITIONS=518} [2023-01-28 02:47:05,364 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-01-28 02:47:05,364 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 518 transitions, 10716 flow [2023-01-28 02:47:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 174.91304347826087) internal successors, (4023), 23 states have internal predecessors, (4023), 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 02:47:05,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:05,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:05,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:05,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:05,565 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:05,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -494622950, now seen corresponding path program 21 times [2023-01-28 02:47:05,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:05,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077561083] [2023-01-28 02:47:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:05,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:05,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077561083] [2023-01-28 02:47:05,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077561083] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:05,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796910849] [2023-01-28 02:47:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:47:05,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:05,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:05,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 02:47:05,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 02:47:05,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 02:47:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:06,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 91 [2023-01-28 02:47:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:06,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:06,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 02:47:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:06,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796910849] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:06,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:06,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:47:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125074136] [2023-01-28 02:47:06,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:47:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:47:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:47:06,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:06,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 518 transitions, 10716 flow. Second operand has 18 states, 18 states have (on average 187.27777777777777) internal successors, (3371), 18 states have internal predecessors, (3371), 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 02:47:06,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:06,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:06,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:07,551 INFO L130 PetriNetUnfolder]: 1698/3775 cut-off events. [2023-01-28 02:47:07,552 INFO L131 PetriNetUnfolder]: For 59878/59878 co-relation queries the response was YES. [2023-01-28 02:47:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28252 conditions, 3775 events. 1698/3775 cut-off events. For 59878/59878 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30886 event pairs, 689 based on Foata normal form. 24/3799 useless extension candidates. Maximal degree in co-relation 28141. Up to 3271 conditions per place. [2023-01-28 02:47:07,577 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 438 selfloop transitions, 114 changer transitions 5/557 dead transitions. [2023-01-28 02:47:07,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 557 transitions, 12420 flow [2023-01-28 02:47:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 02:47:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 02:47:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2090 transitions. [2023-01-28 02:47:07,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-28 02:47:07,579 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2090 transitions. [2023-01-28 02:47:07,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2090 transitions. [2023-01-28 02:47:07,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:07,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2090 transitions. [2023-01-28 02:47:07,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.0) internal successors, (2090), 11 states have internal predecessors, (2090), 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 02:47:07,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:47:07,583 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:47:07,583 INFO L175 Difference]: Start difference. First operand has 292 places, 518 transitions, 10716 flow. Second operand 11 states and 2090 transitions. [2023-01-28 02:47:07,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 557 transitions, 12420 flow [2023-01-28 02:47:07,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 557 transitions, 12221 flow, removed 51 selfloop flow, removed 7 redundant places. [2023-01-28 02:47:07,960 INFO L231 Difference]: Finished difference. Result has 297 places, 530 transitions, 11174 flow [2023-01-28 02:47:07,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10487, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11174, PETRI_PLACES=297, PETRI_TRANSITIONS=530} [2023-01-28 02:47:07,961 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2023-01-28 02:47:07,961 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 530 transitions, 11174 flow [2023-01-28 02:47:07,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.27777777777777) internal successors, (3371), 18 states have internal predecessors, (3371), 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 02:47:07,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:07,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:07,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:08,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 02:47:08,166 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:08,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:08,167 INFO L85 PathProgramCache]: Analyzing trace with hash 202279714, now seen corresponding path program 22 times [2023-01-28 02:47:08,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:08,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512918774] [2023-01-28 02:47:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:08,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:08,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512918774] [2023-01-28 02:47:08,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512918774] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:08,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410675369] [2023-01-28 02:47:08,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:47:08,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:08,449 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:08,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 02:47:08,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:47:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:47:08,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:08,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 52 [2023-01-28 02:47:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:08,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:08,964 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 02:47:08,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 19 [2023-01-28 02:47:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410675369] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:08,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-28 02:47:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242313113] [2023-01-28 02:47:08,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:08,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 02:47:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 02:47:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-01-28 02:47:08,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:08,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 530 transitions, 11174 flow. Second operand has 17 states, 17 states have (on average 187.2941176470588) internal successors, (3184), 17 states have internal predecessors, (3184), 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 02:47:08,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:08,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:08,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:10,211 INFO L130 PetriNetUnfolder]: 1772/3925 cut-off events. [2023-01-28 02:47:10,212 INFO L131 PetriNetUnfolder]: For 60235/60235 co-relation queries the response was YES. [2023-01-28 02:47:10,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29498 conditions, 3925 events. 1772/3925 cut-off events. For 60235/60235 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32314 event pairs, 82 based on Foata normal form. 24/3949 useless extension candidates. Maximal degree in co-relation 29385. Up to 1276 conditions per place. [2023-01-28 02:47:10,247 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 317 selfloop transitions, 289 changer transitions 3/609 dead transitions. [2023-01-28 02:47:10,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 609 transitions, 13470 flow [2023-01-28 02:47:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 02:47:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 02:47:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2293 transitions. [2023-01-28 02:47:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340005931198102 [2023-01-28 02:47:10,250 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2293 transitions. [2023-01-28 02:47:10,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2293 transitions. [2023-01-28 02:47:10,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:10,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2293 transitions. [2023-01-28 02:47:10,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 191.08333333333334) internal successors, (2293), 12 states have internal predecessors, (2293), 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 02:47:10,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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 02:47:10,254 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 562.0) internal successors, (7306), 13 states have internal predecessors, (7306), 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 02:47:10,254 INFO L175 Difference]: Start difference. First operand has 297 places, 530 transitions, 11174 flow. Second operand 12 states and 2293 transitions. [2023-01-28 02:47:10,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 609 transitions, 13470 flow [2023-01-28 02:47:10,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 609 transitions, 13209 flow, removed 31 selfloop flow, removed 8 redundant places. [2023-01-28 02:47:10,781 INFO L231 Difference]: Finished difference. Result has 300 places, 551 transitions, 12098 flow [2023-01-28 02:47:10,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12098, PETRI_PLACES=300, PETRI_TRANSITIONS=551} [2023-01-28 02:47:10,782 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 279 predicate places. [2023-01-28 02:47:10,782 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 551 transitions, 12098 flow [2023-01-28 02:47:10,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.2941176470588) internal successors, (3184), 17 states have internal predecessors, (3184), 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 02:47:10,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:10,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:10,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 02:47:10,983 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:10,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash 222542276, now seen corresponding path program 23 times [2023-01-28 02:47:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:10,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969889976] [2023-01-28 02:47:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:11,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:11,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969889976] [2023-01-28 02:47:11,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969889976] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:11,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000460763] [2023-01-28 02:47:11,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:47:11,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:11,287 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:11,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 02:47:11,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:47:11,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 02:47:11,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:11,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-01-28 02:47:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:11,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:11,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-01-28 02:47:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:11,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000460763] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:11,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:11,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-28 02:47:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769066725] [2023-01-28 02:47:11,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 02:47:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 02:47:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-28 02:47:11,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:11,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 551 transitions, 12098 flow. Second operand has 19 states, 19 states have (on average 187.05263157894737) internal successors, (3554), 19 states have internal predecessors, (3554), 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 02:47:11,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:11,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:11,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:13,942 INFO L130 PetriNetUnfolder]: 1778/3935 cut-off events. [2023-01-28 02:47:13,943 INFO L131 PetriNetUnfolder]: For 64668/64668 co-relation queries the response was YES. [2023-01-28 02:47:13,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30505 conditions, 3935 events. 1778/3935 cut-off events. For 64668/64668 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32581 event pairs, 38 based on Foata normal form. 16/3951 useless extension candidates. Maximal degree in co-relation 30391. Up to 948 conditions per place. [2023-01-28 02:47:13,978 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 338 selfloop transitions, 315 changer transitions 0/653 dead transitions. [2023-01-28 02:47:13,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 653 transitions, 14610 flow [2023-01-28 02:47:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 02:47:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 02:47:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4747 transitions. [2023-01-28 02:47:13,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33786476868327403 [2023-01-28 02:47:13,981 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4747 transitions. [2023-01-28 02:47:13,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4747 transitions. [2023-01-28 02:47:13,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:13,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4747 transitions. [2023-01-28 02:47:13,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 189.88) internal successors, (4747), 25 states have internal predecessors, (4747), 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 02:47:13,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 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 02:47:13,990 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 562.0) internal successors, (14612), 26 states have internal predecessors, (14612), 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 02:47:13,990 INFO L175 Difference]: Start difference. First operand has 300 places, 551 transitions, 12098 flow. Second operand 25 states and 4747 transitions. [2023-01-28 02:47:13,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 653 transitions, 14610 flow [2023-01-28 02:47:14,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 653 transitions, 14329 flow, removed 54 selfloop flow, removed 5 redundant places. [2023-01-28 02:47:14,529 INFO L231 Difference]: Finished difference. Result has 323 places, 577 transitions, 13320 flow [2023-01-28 02:47:14,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13320, PETRI_PLACES=323, PETRI_TRANSITIONS=577} [2023-01-28 02:47:14,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-01-28 02:47:14,529 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 577 transitions, 13320 flow [2023-01-28 02:47:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.05263157894737) internal successors, (3554), 19 states have internal predecessors, (3554), 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 02:47:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:14,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:14,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 02:47:14,734 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:14,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash -632764378, now seen corresponding path program 24 times [2023-01-28 02:47:14,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:14,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120554504] [2023-01-28 02:47:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:15,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120554504] [2023-01-28 02:47:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120554504] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505223503] [2023-01-28 02:47:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:47:15,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:15,024 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:15,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 02:47:15,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:47:15,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:15,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-01-28 02:47:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:15,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:15,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:15,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-01-28 02:47:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:15,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505223503] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:15,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:15,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:47:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233254525] [2023-01-28 02:47:15,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:47:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:47:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:47:15,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:15,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 577 transitions, 13320 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 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 02:47:15,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:15,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:15,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:16,791 INFO L130 PetriNetUnfolder]: 1766/3855 cut-off events. [2023-01-28 02:47:16,791 INFO L131 PetriNetUnfolder]: For 68093/68093 co-relation queries the response was YES. [2023-01-28 02:47:16,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 3855 events. 1766/3855 cut-off events. For 68093/68093 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31320 event pairs, 74 based on Foata normal form. 20/3875 useless extension candidates. Maximal degree in co-relation 31527. Up to 2058 conditions per place. [2023-01-28 02:47:16,825 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 387 selfloop transitions, 217 changer transitions 0/604 dead transitions. [2023-01-28 02:47:16,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 604 transitions, 14747 flow [2023-01-28 02:47:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:47:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:47:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1906 transitions. [2023-01-28 02:47:16,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391459074733096 [2023-01-28 02:47:16,827 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1906 transitions. [2023-01-28 02:47:16,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1906 transitions. [2023-01-28 02:47:16,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:16,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1906 transitions. [2023-01-28 02:47:16,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 190.6) internal successors, (1906), 10 states have internal predecessors, (1906), 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 02:47:16,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 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 02:47:16,830 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 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 02:47:16,830 INFO L175 Difference]: Start difference. First operand has 323 places, 577 transitions, 13320 flow. Second operand 10 states and 1906 transitions. [2023-01-28 02:47:16,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 604 transitions, 14747 flow [2023-01-28 02:47:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 604 transitions, 13886 flow, removed 159 selfloop flow, removed 23 redundant places. [2023-01-28 02:47:17,418 INFO L231 Difference]: Finished difference. Result has 308 places, 573 transitions, 12912 flow [2023-01-28 02:47:17,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12058, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12912, PETRI_PLACES=308, PETRI_TRANSITIONS=573} [2023-01-28 02:47:17,419 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-28 02:47:17,419 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 573 transitions, 12912 flow [2023-01-28 02:47:17,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 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 02:47:17,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:17,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:17,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:17,620 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:17,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:17,620 INFO L85 PathProgramCache]: Analyzing trace with hash 937006002, now seen corresponding path program 25 times [2023-01-28 02:47:17,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:17,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443692620] [2023-01-28 02:47:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:17,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:47:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443692620] [2023-01-28 02:47:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443692620] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097377318] [2023-01-28 02:47:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:47:18,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:18,119 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:18,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 02:47:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:47:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:18,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 65 [2023-01-28 02:47:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:18,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:18,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:18,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 38 [2023-01-28 02:47:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:18,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097377318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:18,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:18,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 21 [2023-01-28 02:47:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6285613] [2023-01-28 02:47:18,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:18,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:47:18,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:47:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:47:18,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-28 02:47:18,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 573 transitions, 12912 flow. Second operand has 21 states, 21 states have (on average 175.0) internal successors, (3675), 21 states have internal predecessors, (3675), 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 02:47:18,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:18,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-28 02:47:18,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:20,157 INFO L130 PetriNetUnfolder]: 1786/3867 cut-off events. [2023-01-28 02:47:20,158 INFO L131 PetriNetUnfolder]: For 66159/66159 co-relation queries the response was YES. [2023-01-28 02:47:20,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31108 conditions, 3867 events. 1786/3867 cut-off events. For 66159/66159 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31135 event pairs, 349 based on Foata normal form. 24/3891 useless extension candidates. Maximal degree in co-relation 31001. Up to 1532 conditions per place. [2023-01-28 02:47:20,184 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 386 selfloop transitions, 221 changer transitions 1/608 dead transitions. [2023-01-28 02:47:20,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 608 transitions, 14493 flow [2023-01-28 02:47:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:47:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:47:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2308 transitions. [2023-01-28 02:47:20,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31590473583356143 [2023-01-28 02:47:20,187 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2308 transitions. [2023-01-28 02:47:20,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2308 transitions. [2023-01-28 02:47:20,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:20,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2308 transitions. [2023-01-28 02:47:20,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.53846153846155) internal successors, (2308), 13 states have internal predecessors, (2308), 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 02:47:20,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:20,191 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:20,191 INFO L175 Difference]: Start difference. First operand has 308 places, 573 transitions, 12912 flow. Second operand 13 states and 2308 transitions. [2023-01-28 02:47:20,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 608 transitions, 14493 flow [2023-01-28 02:47:20,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 608 transitions, 14062 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-01-28 02:47:20,636 INFO L231 Difference]: Finished difference. Result has 313 places, 577 transitions, 13031 flow [2023-01-28 02:47:20,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12421, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13031, PETRI_PLACES=313, PETRI_TRANSITIONS=577} [2023-01-28 02:47:20,637 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-01-28 02:47:20,637 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 577 transitions, 13031 flow [2023-01-28 02:47:20,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 175.0) internal successors, (3675), 21 states have internal predecessors, (3675), 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 02:47:20,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:20,637 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:20,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:20,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:20,838 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:20,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:20,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1238315755, now seen corresponding path program 26 times [2023-01-28 02:47:20,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:20,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718582189] [2023-01-28 02:47:20,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:21,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718582189] [2023-01-28 02:47:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718582189] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65665960] [2023-01-28 02:47:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:47:21,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:21,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:21,093 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:21,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 02:47:21,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:47:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 02:47:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:21,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-01-28 02:47:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:21,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:21,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:21,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 55 [2023-01-28 02:47:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65665960] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:21,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:21,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:47:21,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137808524] [2023-01-28 02:47:21,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:21,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:47:21,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:47:21,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:47:21,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:21,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 577 transitions, 13031 flow. Second operand has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 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 02:47:21,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:21,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:22,850 INFO L130 PetriNetUnfolder]: 1774/3823 cut-off events. [2023-01-28 02:47:22,850 INFO L131 PetriNetUnfolder]: For 68701/68701 co-relation queries the response was YES. [2023-01-28 02:47:22,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30936 conditions, 3823 events. 1774/3823 cut-off events. For 68701/68701 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30611 event pairs, 749 based on Foata normal form. 4/3827 useless extension candidates. Maximal degree in co-relation 30827. Up to 3467 conditions per place. [2023-01-28 02:47:22,880 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 499 selfloop transitions, 92 changer transitions 0/591 dead transitions. [2023-01-28 02:47:22,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 591 transitions, 14198 flow [2023-01-28 02:47:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:47:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:47:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1901 transitions. [2023-01-28 02:47:22,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382562277580071 [2023-01-28 02:47:22,882 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1901 transitions. [2023-01-28 02:47:22,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1901 transitions. [2023-01-28 02:47:22,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:22,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1901 transitions. [2023-01-28 02:47:22,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 190.1) internal successors, (1901), 10 states have internal predecessors, (1901), 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 02:47:22,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 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 02:47:22,886 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 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 02:47:22,886 INFO L175 Difference]: Start difference. First operand has 313 places, 577 transitions, 13031 flow. Second operand 10 states and 1901 transitions. [2023-01-28 02:47:22,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 591 transitions, 14198 flow [2023-01-28 02:47:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 591 transitions, 13948 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-01-28 02:47:23,351 INFO L231 Difference]: Finished difference. Result has 311 places, 573 transitions, 12880 flow [2023-01-28 02:47:23,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12696, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12880, PETRI_PLACES=311, PETRI_TRANSITIONS=573} [2023-01-28 02:47:23,352 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-01-28 02:47:23,352 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 573 transitions, 12880 flow [2023-01-28 02:47:23,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 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 02:47:23,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:23,352 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:23,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:23,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:23,553 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:23,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:23,553 INFO L85 PathProgramCache]: Analyzing trace with hash 852990556, now seen corresponding path program 27 times [2023-01-28 02:47:23,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:23,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783336140] [2023-01-28 02:47:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783336140] [2023-01-28 02:47:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783336140] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574215606] [2023-01-28 02:47:23,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:47:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:23,912 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:23,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 02:47:24,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:47:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:24,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:24,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:24,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-01-28 02:47:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:24,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:24,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:24,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 02:47:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574215606] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:24,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:24,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-28 02:47:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431279316] [2023-01-28 02:47:24,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:24,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 02:47:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 02:47:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-01-28 02:47:24,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:24,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 573 transitions, 12880 flow. Second operand has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 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 02:47:24,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:24,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:25,667 INFO L130 PetriNetUnfolder]: 1766/3759 cut-off events. [2023-01-28 02:47:25,667 INFO L131 PetriNetUnfolder]: For 66182/66182 co-relation queries the response was YES. [2023-01-28 02:47:25,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30583 conditions, 3759 events. 1766/3759 cut-off events. For 66182/66182 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29660 event pairs, 711 based on Foata normal form. 16/3775 useless extension candidates. Maximal degree in co-relation 30475. Up to 3341 conditions per place. [2023-01-28 02:47:25,692 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 470 selfloop transitions, 116 changer transitions 0/586 dead transitions. [2023-01-28 02:47:25,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 586 transitions, 14088 flow [2023-01-28 02:47:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 02:47:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 02:47:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1897 transitions. [2023-01-28 02:47:25,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33754448398576514 [2023-01-28 02:47:25,694 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1897 transitions. [2023-01-28 02:47:25,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1897 transitions. [2023-01-28 02:47:25,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:25,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1897 transitions. [2023-01-28 02:47:25,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 189.7) internal successors, (1897), 10 states have internal predecessors, (1897), 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 02:47:25,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 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 02:47:25,697 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 562.0) internal successors, (6182), 11 states have internal predecessors, (6182), 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 02:47:25,697 INFO L175 Difference]: Start difference. First operand has 311 places, 573 transitions, 12880 flow. Second operand 10 states and 1897 transitions. [2023-01-28 02:47:25,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 586 transitions, 14088 flow [2023-01-28 02:47:26,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 586 transitions, 13896 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-01-28 02:47:26,096 INFO L231 Difference]: Finished difference. Result has 310 places, 569 transitions, 12806 flow [2023-01-28 02:47:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12415, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12806, PETRI_PLACES=310, PETRI_TRANSITIONS=569} [2023-01-28 02:47:26,097 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 289 predicate places. [2023-01-28 02:47:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 569 transitions, 12806 flow [2023-01-28 02:47:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 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 02:47:26,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:26,097 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:26,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:26,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 02:47:26,301 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:26,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1108262019, now seen corresponding path program 28 times [2023-01-28 02:47:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:26,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143263310] [2023-01-28 02:47:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:47:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143263310] [2023-01-28 02:47:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143263310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733711207] [2023-01-28 02:47:26,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:47:26,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:26,795 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:26,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 02:47:26,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:47:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:26,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:27,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-01-28 02:47:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:27,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:27,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:27,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-01-28 02:47:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:27,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733711207] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:27,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:27,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-01-28 02:47:27,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418948525] [2023-01-28 02:47:27,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:27,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 02:47:27,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:27,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 02:47:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-01-28 02:47:27,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 562 [2023-01-28 02:47:27,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 569 transitions, 12806 flow. Second operand has 24 states, 24 states have (on average 174.83333333333334) internal successors, (4196), 24 states have internal predecessors, (4196), 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 02:47:27,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:27,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 562 [2023-01-28 02:47:27,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:28,827 INFO L130 PetriNetUnfolder]: 1740/3681 cut-off events. [2023-01-28 02:47:28,827 INFO L131 PetriNetUnfolder]: For 64024/64024 co-relation queries the response was YES. [2023-01-28 02:47:28,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30281 conditions, 3681 events. 1740/3681 cut-off events. For 64024/64024 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28827 event pairs, 476 based on Foata normal form. 12/3693 useless extension candidates. Maximal degree in co-relation 30173. Up to 2305 conditions per place. [2023-01-28 02:47:28,857 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 423 selfloop transitions, 175 changer transitions 3/601 dead transitions. [2023-01-28 02:47:28,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 601 transitions, 14190 flow [2023-01-28 02:47:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:47:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:47:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2319 transitions. [2023-01-28 02:47:28,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31741034765945797 [2023-01-28 02:47:28,861 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2319 transitions. [2023-01-28 02:47:28,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2319 transitions. [2023-01-28 02:47:28,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:28,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2319 transitions. [2023-01-28 02:47:28,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 178.3846153846154) internal successors, (2319), 13 states have internal predecessors, (2319), 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 02:47:28,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:28,866 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:28,866 INFO L175 Difference]: Start difference. First operand has 310 places, 569 transitions, 12806 flow. Second operand 13 states and 2319 transitions. [2023-01-28 02:47:28,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 601 transitions, 14190 flow [2023-01-28 02:47:29,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 601 transitions, 13788 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-01-28 02:47:29,303 INFO L231 Difference]: Finished difference. Result has 312 places, 563 transitions, 12673 flow [2023-01-28 02:47:29,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12268, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12673, PETRI_PLACES=312, PETRI_TRANSITIONS=563} [2023-01-28 02:47:29,304 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-01-28 02:47:29,304 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 563 transitions, 12673 flow [2023-01-28 02:47:29,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 174.83333333333334) internal successors, (4196), 24 states have internal predecessors, (4196), 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 02:47:29,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:29,304 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:29,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:29,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:29,505 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:29,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1110045957, now seen corresponding path program 29 times [2023-01-28 02:47:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60662377] [2023-01-28 02:47:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60662377] [2023-01-28 02:47:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60662377] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957387318] [2023-01-28 02:47:29,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:47:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:29,825 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:29,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 02:47:29,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:47:29,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:30,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2023-01-28 02:47:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:30,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:30,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:30,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 69 [2023-01-28 02:47:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:30,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957387318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:30,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-01-28 02:47:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435115227] [2023-01-28 02:47:30,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:30,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 02:47:30,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 02:47:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-01-28 02:47:30,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:30,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 563 transitions, 12673 flow. Second operand has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 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 02:47:30,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:30,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:30,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:31,804 INFO L130 PetriNetUnfolder]: 1726/3631 cut-off events. [2023-01-28 02:47:31,805 INFO L131 PetriNetUnfolder]: For 62873/62873 co-relation queries the response was YES. [2023-01-28 02:47:31,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 3631 events. 1726/3631 cut-off events. For 62873/62873 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 28132 event pairs, 356 based on Foata normal form. 12/3643 useless extension candidates. Maximal degree in co-relation 29803. Up to 1996 conditions per place. [2023-01-28 02:47:31,832 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 365 selfloop transitions, 238 changer transitions 0/603 dead transitions. [2023-01-28 02:47:31,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 603 transitions, 14026 flow [2023-01-28 02:47:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:47:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:47:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2485 transitions. [2023-01-28 02:47:31,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34013139885026006 [2023-01-28 02:47:31,834 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2485 transitions. [2023-01-28 02:47:31,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2485 transitions. [2023-01-28 02:47:31,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:31,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2485 transitions. [2023-01-28 02:47:31,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 191.15384615384616) internal successors, (2485), 13 states have internal predecessors, (2485), 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 02:47:31,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:31,839 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:31,839 INFO L175 Difference]: Start difference. First operand has 312 places, 563 transitions, 12673 flow. Second operand 13 states and 2485 transitions. [2023-01-28 02:47:31,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 603 transitions, 14026 flow [2023-01-28 02:47:32,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 603 transitions, 13764 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-01-28 02:47:32,252 INFO L231 Difference]: Finished difference. Result has 309 places, 563 transitions, 12999 flow [2023-01-28 02:47:32,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12349, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12999, PETRI_PLACES=309, PETRI_TRANSITIONS=563} [2023-01-28 02:47:32,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-28 02:47:32,252 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 563 transitions, 12999 flow [2023-01-28 02:47:32,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 187.15) internal successors, (3743), 20 states have internal predecessors, (3743), 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 02:47:32,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:32,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:32,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:32,453 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:32,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2082779586, now seen corresponding path program 30 times [2023-01-28 02:47:32,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716962553] [2023-01-28 02:47:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716962553] [2023-01-28 02:47:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716962553] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164730999] [2023-01-28 02:47:32,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:47:32,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:32,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:32,725 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:32,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 02:47:32,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:47:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:47:32,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:33,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-01-28 02:47:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:33,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:33,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:33,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 61 [2023-01-28 02:47:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164730999] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:33,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:47:33,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148884415] [2023-01-28 02:47:33,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:33,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:47:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:47:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:47:33,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:33,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 563 transitions, 12999 flow. Second operand has 18 states, 18 states have (on average 187.22222222222223) internal successors, (3370), 18 states have internal predecessors, (3370), 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 02:47:33,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:33,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:33,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:34,303 INFO L130 PetriNetUnfolder]: 1694/3559 cut-off events. [2023-01-28 02:47:34,303 INFO L131 PetriNetUnfolder]: For 64012/64012 co-relation queries the response was YES. [2023-01-28 02:47:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30097 conditions, 3559 events. 1694/3559 cut-off events. For 64012/64012 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27375 event pairs, 434 based on Foata normal form. 8/3567 useless extension candidates. Maximal degree in co-relation 29993. Up to 2492 conditions per place. [2023-01-28 02:47:34,332 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 368 selfloop transitions, 207 changer transitions 10/585 dead transitions. [2023-01-28 02:47:34,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 585 transitions, 14226 flow [2023-01-28 02:47:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 02:47:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 02:47:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2092 transitions. [2023-01-28 02:47:34,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33840181171142025 [2023-01-28 02:47:34,334 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2092 transitions. [2023-01-28 02:47:34,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2092 transitions. [2023-01-28 02:47:34,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:34,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2092 transitions. [2023-01-28 02:47:34,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.1818181818182) internal successors, (2092), 11 states have internal predecessors, (2092), 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 02:47:34,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:47:34,337 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 562.0) internal successors, (6744), 12 states have internal predecessors, (6744), 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 02:47:34,338 INFO L175 Difference]: Start difference. First operand has 309 places, 563 transitions, 12999 flow. Second operand 11 states and 2092 transitions. [2023-01-28 02:47:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 585 transitions, 14226 flow [2023-01-28 02:47:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 585 transitions, 13933 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-01-28 02:47:34,777 INFO L231 Difference]: Finished difference. Result has 309 places, 556 transitions, 12982 flow [2023-01-28 02:47:34,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12642, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12982, PETRI_PLACES=309, PETRI_TRANSITIONS=556} [2023-01-28 02:47:34,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-01-28 02:47:34,778 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 556 transitions, 12982 flow [2023-01-28 02:47:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.22222222222223) internal successors, (3370), 18 states have internal predecessors, (3370), 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 02:47:34,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:34,778 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:34,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:34,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 02:47:34,979 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:34,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 452270500, now seen corresponding path program 31 times [2023-01-28 02:47:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:34,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796194855] [2023-01-28 02:47:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796194855] [2023-01-28 02:47:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796194855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:35,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038229396] [2023-01-28 02:47:35,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:47:35,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:35,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:35,282 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:35,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 02:47:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:35,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:35,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 80 [2023-01-28 02:47:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:35,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:35,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:35,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2023-01-28 02:47:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:35,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038229396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:35,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:35,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-28 02:47:35,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147257342] [2023-01-28 02:47:35,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:35,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 02:47:35,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 02:47:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-01-28 02:47:35,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:35,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 556 transitions, 12982 flow. Second operand has 21 states, 21 states have (on average 187.28571428571428) internal successors, (3933), 21 states have internal predecessors, (3933), 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 02:47:35,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:35,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:35,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:37,310 INFO L130 PetriNetUnfolder]: 1654/3463 cut-off events. [2023-01-28 02:47:37,310 INFO L131 PetriNetUnfolder]: For 64625/64625 co-relation queries the response was YES. [2023-01-28 02:47:37,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29571 conditions, 3463 events. 1654/3463 cut-off events. For 64625/64625 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26384 event pairs, 62 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 29467. Up to 1738 conditions per place. [2023-01-28 02:47:37,341 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 324 selfloop transitions, 253 changer transitions 5/582 dead transitions. [2023-01-28 02:47:37,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 582 transitions, 14247 flow [2023-01-28 02:47:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 02:47:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 02:47:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2470 transitions. [2023-01-28 02:47:37,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33807829181494664 [2023-01-28 02:47:37,344 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2470 transitions. [2023-01-28 02:47:37,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2470 transitions. [2023-01-28 02:47:37,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:37,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2470 transitions. [2023-01-28 02:47:37,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 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 02:47:37,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:37,349 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 562.0) internal successors, (7868), 14 states have internal predecessors, (7868), 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 02:47:37,349 INFO L175 Difference]: Start difference. First operand has 309 places, 556 transitions, 12982 flow. Second operand 13 states and 2470 transitions. [2023-01-28 02:47:37,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 582 transitions, 14247 flow [2023-01-28 02:47:37,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 582 transitions, 13806 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-01-28 02:47:37,816 INFO L231 Difference]: Finished difference. Result has 305 places, 549 transitions, 12897 flow [2023-01-28 02:47:37,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12441, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12897, PETRI_PLACES=305, PETRI_TRANSITIONS=549} [2023-01-28 02:47:37,817 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-01-28 02:47:37,817 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 549 transitions, 12897 flow [2023-01-28 02:47:37,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 187.28571428571428) internal successors, (3933), 21 states have internal predecessors, (3933), 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 02:47:37,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:37,818 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:37,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:38,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 02:47:38,018 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:38,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 216370355, now seen corresponding path program 32 times [2023-01-28 02:47:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016949076] [2023-01-28 02:47:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016949076] [2023-01-28 02:47:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016949076] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646520636] [2023-01-28 02:47:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:47:38,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:38,296 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:38,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 02:47:38,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:47:38,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:38,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:47:38,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:38,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-01-28 02:47:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:38,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:38,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:38,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 02:47:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:38,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646520636] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:38,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:38,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-01-28 02:47:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509785718] [2023-01-28 02:47:38,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 02:47:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 02:47:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-01-28 02:47:38,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:47:38,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 549 transitions, 12897 flow. Second operand has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 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 02:47:38,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:38,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:47:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:40,007 INFO L130 PetriNetUnfolder]: 1626/3339 cut-off events. [2023-01-28 02:47:40,007 INFO L131 PetriNetUnfolder]: For 67515/67515 co-relation queries the response was YES. [2023-01-28 02:47:40,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28946 conditions, 3339 events. 1626/3339 cut-off events. For 67515/67515 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24758 event pairs, 623 based on Foata normal form. 32/3371 useless extension candidates. Maximal degree in co-relation 28843. Up to 2977 conditions per place. [2023-01-28 02:47:40,037 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 457 selfloop transitions, 105 changer transitions 2/564 dead transitions. [2023-01-28 02:47:40,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 564 transitions, 14071 flow [2023-01-28 02:47:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 02:47:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 02:47:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1712 transitions. [2023-01-28 02:47:40,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33847370502174773 [2023-01-28 02:47:40,039 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1712 transitions. [2023-01-28 02:47:40,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1712 transitions. [2023-01-28 02:47:40,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:40,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1712 transitions. [2023-01-28 02:47:40,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 190.22222222222223) internal successors, (1712), 9 states have internal predecessors, (1712), 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 02:47:40,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 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 02:47:40,042 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 562.0) internal successors, (5620), 10 states have internal predecessors, (5620), 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 02:47:40,042 INFO L175 Difference]: Start difference. First operand has 305 places, 549 transitions, 12897 flow. Second operand 9 states and 1712 transitions. [2023-01-28 02:47:40,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 564 transitions, 14071 flow [2023-01-28 02:47:40,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 564 transitions, 13541 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-01-28 02:47:40,406 INFO L231 Difference]: Finished difference. Result has 293 places, 543 transitions, 12486 flow [2023-01-28 02:47:40,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12233, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12486, PETRI_PLACES=293, PETRI_TRANSITIONS=543} [2023-01-28 02:47:40,407 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-01-28 02:47:40,407 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 543 transitions, 12486 flow [2023-01-28 02:47:40,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.26315789473685) internal successors, (3558), 19 states have internal predecessors, (3558), 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 02:47:40,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:40,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:40,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:40,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 02:47:40,608 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:40,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1781878825, now seen corresponding path program 33 times [2023-01-28 02:47:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:40,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202297723] [2023-01-28 02:47:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:40,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202297723] [2023-01-28 02:47:40,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202297723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:40,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020544673] [2023-01-28 02:47:40,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:47:40,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:40,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:40,932 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:40,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 02:47:41,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:47:41,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 02:47:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:47:41,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-01-28 02:47:41,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-01-28 02:47:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:41,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:41,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:41,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-01-28 02:47:41,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-01-28 02:47:41,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-01-28 02:47:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020544673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:41,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:41,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 02:47:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127937742] [2023-01-28 02:47:41,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:41,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 02:47:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 02:47:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2023-01-28 02:47:41,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-28 02:47:41,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 543 transitions, 12486 flow. Second operand has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 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 02:47:41,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:41,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-28 02:47:41,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:42,890 INFO L130 PetriNetUnfolder]: 1655/3366 cut-off events. [2023-01-28 02:47:42,891 INFO L131 PetriNetUnfolder]: For 64154/64154 co-relation queries the response was YES. [2023-01-28 02:47:42,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29115 conditions, 3366 events. 1655/3366 cut-off events. For 64154/64154 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24718 event pairs, 148 based on Foata normal form. 36/3402 useless extension candidates. Maximal degree in co-relation 29014. Up to 1308 conditions per place. [2023-01-28 02:47:42,919 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 234 selfloop transitions, 374 changer transitions 2/610 dead transitions. [2023-01-28 02:47:42,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 610 transitions, 14697 flow [2023-01-28 02:47:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:47:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:47:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2610 transitions. [2023-01-28 02:47:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33172343670564314 [2023-01-28 02:47:42,921 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2610 transitions. [2023-01-28 02:47:42,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2610 transitions. [2023-01-28 02:47:42,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:42,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2610 transitions. [2023-01-28 02:47:42,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.42857142857142) internal successors, (2610), 14 states have internal predecessors, (2610), 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 02:47:42,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:47:42,926 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:47:42,927 INFO L175 Difference]: Start difference. First operand has 293 places, 543 transitions, 12486 flow. Second operand 14 states and 2610 transitions. [2023-01-28 02:47:42,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 610 transitions, 14697 flow [2023-01-28 02:47:43,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 610 transitions, 14488 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-28 02:47:43,358 INFO L231 Difference]: Finished difference. Result has 301 places, 564 transitions, 13716 flow [2023-01-28 02:47:43,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12293, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13716, PETRI_PLACES=301, PETRI_TRANSITIONS=564} [2023-01-28 02:47:43,358 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 280 predicate places. [2023-01-28 02:47:43,358 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 564 transitions, 13716 flow [2023-01-28 02:47:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 182.82608695652175) internal successors, (4205), 23 states have internal predecessors, (4205), 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 02:47:43,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:43,359 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:43,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:43,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 02:47:43,564 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:43,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1235969341, now seen corresponding path program 34 times [2023-01-28 02:47:43,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:43,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146563889] [2023-01-28 02:47:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:43,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146563889] [2023-01-28 02:47:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146563889] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657867811] [2023-01-28 02:47:43,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:47:43,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:43,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:43,918 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:43,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 02:47:44,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:47:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 02:47:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:47:44,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2023-01-28 02:47:44,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-01-28 02:47:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:44,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:44,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:44,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-01-28 02:47:44,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-01-28 02:47:44,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-01-28 02:47:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657867811] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:44,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:44,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 02:47:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856302221] [2023-01-28 02:47:44,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:44,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 02:47:44,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 02:47:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2023-01-28 02:47:44,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-28 02:47:44,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 564 transitions, 13716 flow. Second operand has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 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 02:47:44,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:44,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-28 02:47:44,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:46,486 INFO L130 PetriNetUnfolder]: 1686/3405 cut-off events. [2023-01-28 02:47:46,486 INFO L131 PetriNetUnfolder]: For 71604/71604 co-relation queries the response was YES. [2023-01-28 02:47:46,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30668 conditions, 3405 events. 1686/3405 cut-off events. For 71604/71604 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24921 event pairs, 158 based on Foata normal form. 12/3417 useless extension candidates. Maximal degree in co-relation 30565. Up to 1814 conditions per place. [2023-01-28 02:47:46,513 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 293 selfloop transitions, 347 changer transitions 1/641 dead transitions. [2023-01-28 02:47:46,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 641 transitions, 15905 flow [2023-01-28 02:47:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 02:47:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 02:47:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3179 transitions. [2023-01-28 02:47:46,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33274021352313166 [2023-01-28 02:47:46,516 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3179 transitions. [2023-01-28 02:47:46,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3179 transitions. [2023-01-28 02:47:46,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:46,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3179 transitions. [2023-01-28 02:47:46,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 187.0) internal successors, (3179), 17 states have internal predecessors, (3179), 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 02:47:46,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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 02:47:46,522 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 562.0) internal successors, (10116), 18 states have internal predecessors, (10116), 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 02:47:46,522 INFO L175 Difference]: Start difference. First operand has 301 places, 564 transitions, 13716 flow. Second operand 17 states and 3179 transitions. [2023-01-28 02:47:46,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 641 transitions, 15905 flow [2023-01-28 02:47:46,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 641 transitions, 15309 flow, removed 61 selfloop flow, removed 8 redundant places. [2023-01-28 02:47:47,001 INFO L231 Difference]: Finished difference. Result has 312 places, 576 transitions, 14264 flow [2023-01-28 02:47:47,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13129, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14264, PETRI_PLACES=312, PETRI_TRANSITIONS=576} [2023-01-28 02:47:47,002 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 291 predicate places. [2023-01-28 02:47:47,002 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 576 transitions, 14264 flow [2023-01-28 02:47:47,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.84) internal successors, (4571), 25 states have internal predecessors, (4571), 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 02:47:47,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:47,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:47,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:47,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:47,203 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:47,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -935413069, now seen corresponding path program 35 times [2023-01-28 02:47:47,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:47,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576686668] [2023-01-28 02:47:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:47,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576686668] [2023-01-28 02:47:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576686668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244394205] [2023-01-28 02:47:47,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:47:47,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:47,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:47,608 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:47,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 02:47:47,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:47:47,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 02:47:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:47:47,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2023-01-28 02:47:48,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 93 [2023-01-28 02:47:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:48,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:48,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:48,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 58 [2023-01-28 02:47:48,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-01-28 02:47:48,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-01-28 02:47:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:48,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244394205] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:48,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:48,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-01-28 02:47:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295437808] [2023-01-28 02:47:48,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:48,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 02:47:48,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:48,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 02:47:48,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=494, Unknown=4, NotChecked=0, Total=600 [2023-01-28 02:47:48,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-28 02:47:48,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 576 transitions, 14264 flow. Second operand has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 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 02:47:48,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:48,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-28 02:47:48,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:49,816 INFO L130 PetriNetUnfolder]: 1668/3343 cut-off events. [2023-01-28 02:47:49,816 INFO L131 PetriNetUnfolder]: For 72659/72659 co-relation queries the response was YES. [2023-01-28 02:47:49,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30366 conditions, 3343 events. 1668/3343 cut-off events. For 72659/72659 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 24273 event pairs, 136 based on Foata normal form. 6/3349 useless extension candidates. Maximal degree in co-relation 30262. Up to 1814 conditions per place. [2023-01-28 02:47:49,839 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 272 selfloop transitions, 339 changer transitions 2/613 dead transitions. [2023-01-28 02:47:49,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 613 transitions, 15667 flow [2023-01-28 02:47:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 02:47:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 02:47:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2615 transitions. [2023-01-28 02:47:49,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3323589222165735 [2023-01-28 02:47:49,841 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2615 transitions. [2023-01-28 02:47:49,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2615 transitions. [2023-01-28 02:47:49,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:49,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2615 transitions. [2023-01-28 02:47:49,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 186.78571428571428) internal successors, (2615), 14 states have internal predecessors, (2615), 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 02:47:49,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:47:49,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 562.0) internal successors, (8430), 15 states have internal predecessors, (8430), 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 02:47:49,846 INFO L175 Difference]: Start difference. First operand has 312 places, 576 transitions, 14264 flow. Second operand 14 states and 2615 transitions. [2023-01-28 02:47:49,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 613 transitions, 15667 flow [2023-01-28 02:47:50,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 613 transitions, 15307 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-01-28 02:47:50,250 INFO L231 Difference]: Finished difference. Result has 311 places, 568 transitions, 14433 flow [2023-01-28 02:47:50,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13773, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14433, PETRI_PLACES=311, PETRI_TRANSITIONS=568} [2023-01-28 02:47:50,251 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-01-28 02:47:50,251 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 568 transitions, 14433 flow [2023-01-28 02:47:50,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 182.76) internal successors, (4569), 25 states have internal predecessors, (4569), 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 02:47:50,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:50,251 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:50,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:50,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-01-28 02:47:50,456 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:50,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:50,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814978, now seen corresponding path program 36 times [2023-01-28 02:47:50,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:50,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455852637] [2023-01-28 02:47:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:50,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455852637] [2023-01-28 02:47:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455852637] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971029424] [2023-01-28 02:47:50,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:47:50,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:50,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:50,813 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:50,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 02:47:50,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:47:50,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-28 02:47:50,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:47:51,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-01-28 02:47:51,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2023-01-28 02:47:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:51,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:51,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:51,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 75 [2023-01-28 02:47:51,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-01-28 02:47:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971029424] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:51,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:51,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 02:47:51,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155257024] [2023-01-28 02:47:51,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:51,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:47:51,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:47:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2023-01-28 02:47:51,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 562 [2023-01-28 02:47:51,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 568 transitions, 14433 flow. Second operand has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 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 02:47:51,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:51,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 562 [2023-01-28 02:47:51,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:53,295 INFO L130 PetriNetUnfolder]: 1634/3265 cut-off events. [2023-01-28 02:47:53,295 INFO L131 PetriNetUnfolder]: For 78614/78614 co-relation queries the response was YES. [2023-01-28 02:47:53,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 3265 events. 1634/3265 cut-off events. For 78614/78614 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23440 event pairs, 187 based on Foata normal form. 8/3273 useless extension candidates. Maximal degree in co-relation 30090. Up to 1064 conditions per place. [2023-01-28 02:47:53,321 INFO L137 encePairwiseOnDemand]: 555/562 looper letters, 258 selfloop transitions, 339 changer transitions 11/608 dead transitions. [2023-01-28 02:47:53,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 608 transitions, 15993 flow [2023-01-28 02:47:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 02:47:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 02:47:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3517 transitions. [2023-01-28 02:47:53,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32936879565461696 [2023-01-28 02:47:53,323 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3517 transitions. [2023-01-28 02:47:53,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3517 transitions. [2023-01-28 02:47:53,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:53,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3517 transitions. [2023-01-28 02:47:53,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 185.10526315789474) internal successors, (3517), 19 states have internal predecessors, (3517), 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 02:47:53,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 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 02:47:53,330 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 562.0) internal successors, (11240), 20 states have internal predecessors, (11240), 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 02:47:53,330 INFO L175 Difference]: Start difference. First operand has 311 places, 568 transitions, 14433 flow. Second operand 19 states and 3517 transitions. [2023-01-28 02:47:53,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 608 transitions, 15993 flow [2023-01-28 02:47:53,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 608 transitions, 15316 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-01-28 02:47:53,705 INFO L231 Difference]: Finished difference. Result has 314 places, 571 transitions, 14482 flow [2023-01-28 02:47:53,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13698, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14482, PETRI_PLACES=314, PETRI_TRANSITIONS=571} [2023-01-28 02:47:53,706 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-01-28 02:47:53,706 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 571 transitions, 14482 flow [2023-01-28 02:47:53,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 182.84615384615384) internal successors, (4754), 26 states have internal predecessors, (4754), 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 02:47:53,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:53,707 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:53,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 02:47:53,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-01-28 02:47:53,907 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:53,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash -479361748, now seen corresponding path program 37 times [2023-01-28 02:47:53,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:53,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757903173] [2023-01-28 02:47:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:53,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 02:47:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:53,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757903173] [2023-01-28 02:47:53,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757903173] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:47:53,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:47:53,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 02:47:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252302133] [2023-01-28 02:47:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:47:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 02:47:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 02:47:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 02:47:53,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 562 [2023-01-28 02:47:53,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 571 transitions, 14482 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 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 02:47:53,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:53,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 562 [2023-01-28 02:47:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:54,322 INFO L130 PetriNetUnfolder]: 819/1624 cut-off events. [2023-01-28 02:47:54,323 INFO L131 PetriNetUnfolder]: For 39054/39054 co-relation queries the response was YES. [2023-01-28 02:47:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15255 conditions, 1624 events. 819/1624 cut-off events. For 39054/39054 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9899 event pairs, 350 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 15158. Up to 1621 conditions per place. [2023-01-28 02:47:54,335 INFO L137 encePairwiseOnDemand]: 560/562 looper letters, 348 selfloop transitions, 4 changer transitions 0/352 dead transitions. [2023-01-28 02:47:54,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 352 transitions, 9011 flow [2023-01-28 02:47:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 02:47:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 02:47:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1400 transitions. [2023-01-28 02:47:54,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151838671411625 [2023-01-28 02:47:54,336 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1400 transitions. [2023-01-28 02:47:54,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1400 transitions. [2023-01-28 02:47:54,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:54,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1400 transitions. [2023-01-28 02:47:54,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 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 02:47:54,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 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 02:47:54,338 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 562.0) internal successors, (3934), 7 states have internal predecessors, (3934), 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 02:47:54,338 INFO L175 Difference]: Start difference. First operand has 314 places, 571 transitions, 14482 flow. Second operand 6 states and 1400 transitions. [2023-01-28 02:47:54,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 352 transitions, 9011 flow [2023-01-28 02:47:54,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 352 transitions, 7835 flow, removed 15 selfloop flow, removed 34 redundant places. [2023-01-28 02:47:54,484 INFO L231 Difference]: Finished difference. Result has 261 places, 352 transitions, 7139 flow [2023-01-28 02:47:54,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7139, PETRI_PLACES=261, PETRI_TRANSITIONS=352} [2023-01-28 02:47:54,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-01-28 02:47:54,484 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 352 transitions, 7139 flow [2023-01-28 02:47:54,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 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 02:47:54,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:54,485 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:47:54,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-01-28 02:47:54,485 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:47:54,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash -678092971, now seen corresponding path program 38 times [2023-01-28 02:47:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:54,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831444795] [2023-01-28 02:47:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:54,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:47:55,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:55,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831444795] [2023-01-28 02:47:55,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831444795] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:55,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731225160] [2023-01-28 02:47:55,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:47:55,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:55,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:55,276 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:47:55,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 02:47:55,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:47:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 02:47:55,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:55,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 86 [2023-01-28 02:47:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:55,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:57,085 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 02:47:57,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 141 [2023-01-28 02:47:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:57,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731225160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:57,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:57,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 02:47:57,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608224284] [2023-01-28 02:47:57,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:57,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:47:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:47:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:47:57,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:47:57,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 352 transitions, 7139 flow. Second operand has 32 states, 32 states have (on average 161.71875) internal successors, (5175), 32 states have internal predecessors, (5175), 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 02:47:57,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:57,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:47:57,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:48:02,922 INFO L130 PetriNetUnfolder]: 1391/2887 cut-off events. [2023-01-28 02:48:02,923 INFO L131 PetriNetUnfolder]: For 54196/54196 co-relation queries the response was YES. [2023-01-28 02:48:02,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 2887 events. 1391/2887 cut-off events. For 54196/54196 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20997 event pairs, 52 based on Foata normal form. 26/2913 useless extension candidates. Maximal degree in co-relation 23717. Up to 739 conditions per place. [2023-01-28 02:48:02,942 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 233 selfloop transitions, 362 changer transitions 64/659 dead transitions. [2023-01-28 02:48:02,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 659 transitions, 13609 flow [2023-01-28 02:48:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 02:48:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 02:48:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6903 transitions. [2023-01-28 02:48:02,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29245043213014743 [2023-01-28 02:48:02,946 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6903 transitions. [2023-01-28 02:48:02,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6903 transitions. [2023-01-28 02:48:02,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:02,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6903 transitions. [2023-01-28 02:48:02,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 164.35714285714286) internal successors, (6903), 42 states have internal predecessors, (6903), 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 02:48:02,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 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 02:48:02,959 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 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 02:48:02,959 INFO L175 Difference]: Start difference. First operand has 261 places, 352 transitions, 7139 flow. Second operand 42 states and 6903 transitions. [2023-01-28 02:48:02,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 659 transitions, 13609 flow [2023-01-28 02:48:03,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 659 transitions, 13602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 02:48:03,224 INFO L231 Difference]: Finished difference. Result has 307 places, 480 transitions, 10528 flow [2023-01-28 02:48:03,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10528, PETRI_PLACES=307, PETRI_TRANSITIONS=480} [2023-01-28 02:48:03,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2023-01-28 02:48:03,225 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 480 transitions, 10528 flow [2023-01-28 02:48:03,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.71875) internal successors, (5175), 32 states have internal predecessors, (5175), 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 02:48:03,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:03,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:48:03,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 02:48:03,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 02:48:03,426 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:48:03,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:03,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1882165963, now seen corresponding path program 39 times [2023-01-28 02:48:03,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:03,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900464068] [2023-01-28 02:48:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:03,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900464068] [2023-01-28 02:48:04,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900464068] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812764737] [2023-01-28 02:48:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:48:04,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:04,297 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:48:04,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 02:48:04,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:48:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:48:04,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-28 02:48:04,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:04,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:04,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-01-28 02:48:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:05,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:07,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:07,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 277 treesize of output 175 [2023-01-28 02:48:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:07,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812764737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:07,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:07,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-01-28 02:48:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579483416] [2023-01-28 02:48:07,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:48:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:48:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:48:07,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:48:07,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 480 transitions, 10528 flow. Second operand has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 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 02:48:07,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:07,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:48:07,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:48:11,235 INFO L130 PetriNetUnfolder]: 1660/3203 cut-off events. [2023-01-28 02:48:11,235 INFO L131 PetriNetUnfolder]: For 68685/68685 co-relation queries the response was YES. [2023-01-28 02:48:11,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28631 conditions, 3203 events. 1660/3203 cut-off events. For 68685/68685 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22163 event pairs, 176 based on Foata normal form. 7/3210 useless extension candidates. Maximal degree in co-relation 28536. Up to 853 conditions per place. [2023-01-28 02:48:11,260 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 336 selfloop transitions, 348 changer transitions 20/704 dead transitions. [2023-01-28 02:48:11,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 704 transitions, 15880 flow [2023-01-28 02:48:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 02:48:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 02:48:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3995 transitions. [2023-01-28 02:48:11,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32311549660304106 [2023-01-28 02:48:11,263 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3995 transitions. [2023-01-28 02:48:11,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3995 transitions. [2023-01-28 02:48:11,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:11,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3995 transitions. [2023-01-28 02:48:11,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 181.5909090909091) internal successors, (3995), 22 states have internal predecessors, (3995), 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 02:48:11,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 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 02:48:11,270 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 562.0) internal successors, (12926), 23 states have internal predecessors, (12926), 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 02:48:11,270 INFO L175 Difference]: Start difference. First operand has 307 places, 480 transitions, 10528 flow. Second operand 22 states and 3995 transitions. [2023-01-28 02:48:11,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 704 transitions, 15880 flow [2023-01-28 02:48:11,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 704 transitions, 14515 flow, removed 408 selfloop flow, removed 18 redundant places. [2023-01-28 02:48:11,605 INFO L231 Difference]: Finished difference. Result has 314 places, 591 transitions, 12655 flow [2023-01-28 02:48:11,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12655, PETRI_PLACES=314, PETRI_TRANSITIONS=591} [2023-01-28 02:48:11,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-01-28 02:48:11,606 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 591 transitions, 12655 flow [2023-01-28 02:48:11,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 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 02:48:11,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:11,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:48:11,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 02:48:11,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:11,811 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:48:11,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1575334059, now seen corresponding path program 40 times [2023-01-28 02:48:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:11,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297666250] [2023-01-28 02:48:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:12,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297666250] [2023-01-28 02:48:12,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297666250] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:12,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307622338] [2023-01-28 02:48:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:48:12,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:12,420 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:48:12,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 02:48:12,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:48:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:48:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 02:48:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:13,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:13,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 99 [2023-01-28 02:48:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:13,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:15,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:15,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 143 [2023-01-28 02:48:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:15,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307622338] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:15,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:15,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:48:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443757101] [2023-01-28 02:48:15,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:15,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:48:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:48:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:48:15,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:48:15,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 591 transitions, 12655 flow. Second operand has 27 states, 27 states have (on average 177.77777777777777) internal successors, (4800), 27 states have internal predecessors, (4800), 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 02:48:15,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:15,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:48:15,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:48:18,487 INFO L130 PetriNetUnfolder]: 1922/3702 cut-off events. [2023-01-28 02:48:18,488 INFO L131 PetriNetUnfolder]: For 80031/80031 co-relation queries the response was YES. [2023-01-28 02:48:18,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32012 conditions, 3702 events. 1922/3702 cut-off events. For 80031/80031 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26124 event pairs, 384 based on Foata normal form. 16/3718 useless extension candidates. Maximal degree in co-relation 31913. Up to 2091 conditions per place. [2023-01-28 02:48:18,517 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 472 selfloop transitions, 261 changer transitions 31/764 dead transitions. [2023-01-28 02:48:18,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 764 transitions, 16777 flow [2023-01-28 02:48:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 02:48:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 02:48:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5611 transitions. [2023-01-28 02:48:18,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3220640569395018 [2023-01-28 02:48:18,521 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5611 transitions. [2023-01-28 02:48:18,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5611 transitions. [2023-01-28 02:48:18,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:18,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5611 transitions. [2023-01-28 02:48:18,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 181.0) internal successors, (5611), 31 states have internal predecessors, (5611), 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 02:48:18,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:48:18,531 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:48:18,531 INFO L175 Difference]: Start difference. First operand has 314 places, 591 transitions, 12655 flow. Second operand 31 states and 5611 transitions. [2023-01-28 02:48:18,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 764 transitions, 16777 flow [2023-01-28 02:48:18,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 764 transitions, 16540 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-01-28 02:48:19,004 INFO L231 Difference]: Finished difference. Result has 344 places, 644 transitions, 14350 flow [2023-01-28 02:48:19,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=12434, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=14350, PETRI_PLACES=344, PETRI_TRANSITIONS=644} [2023-01-28 02:48:19,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2023-01-28 02:48:19,005 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 644 transitions, 14350 flow [2023-01-28 02:48:19,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.77777777777777) internal successors, (4800), 27 states have internal predecessors, (4800), 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 02:48:19,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:19,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:48:19,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 02:48:19,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:19,206 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:48:19,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:19,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1317900205, now seen corresponding path program 41 times [2023-01-28 02:48:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:19,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985328225] [2023-01-28 02:48:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:19,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:19,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985328225] [2023-01-28 02:48:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985328225] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95265849] [2023-01-28 02:48:19,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:48:19,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:19,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:19,795 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:48:19,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 02:48:19,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:48:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:48:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 02:48:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:20,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 113 [2023-01-28 02:48:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:20,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:21,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:21,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 191 [2023-01-28 02:48:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95265849] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:22,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:48:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910811176] [2023-01-28 02:48:22,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:22,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:48:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:48:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:48:22,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:48:22,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 644 transitions, 14350 flow. Second operand has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 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 02:48:22,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:22,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:48:22,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:48:27,931 INFO L130 PetriNetUnfolder]: 2148/4255 cut-off events. [2023-01-28 02:48:27,931 INFO L131 PetriNetUnfolder]: For 97863/97863 co-relation queries the response was YES. [2023-01-28 02:48:27,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 4255 events. 2148/4255 cut-off events. For 97863/97863 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31657 event pairs, 106 based on Foata normal form. 15/4270 useless extension candidates. Maximal degree in co-relation 37715. Up to 1142 conditions per place. [2023-01-28 02:48:27,967 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 499 selfloop transitions, 426 changer transitions 35/960 dead transitions. [2023-01-28 02:48:27,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 960 transitions, 21428 flow [2023-01-28 02:48:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 02:48:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 02:48:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6550 transitions. [2023-01-28 02:48:27,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237445630684065 [2023-01-28 02:48:27,971 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6550 transitions. [2023-01-28 02:48:27,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6550 transitions. [2023-01-28 02:48:27,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:27,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6550 transitions. [2023-01-28 02:48:27,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 181.94444444444446) internal successors, (6550), 36 states have internal predecessors, (6550), 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 02:48:27,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 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 02:48:27,984 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 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 02:48:27,984 INFO L175 Difference]: Start difference. First operand has 344 places, 644 transitions, 14350 flow. Second operand 36 states and 6550 transitions. [2023-01-28 02:48:27,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 960 transitions, 21428 flow [2023-01-28 02:48:28,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 960 transitions, 20921 flow, removed 154 selfloop flow, removed 17 redundant places. [2023-01-28 02:48:28,682 INFO L231 Difference]: Finished difference. Result has 373 places, 732 transitions, 17052 flow [2023-01-28 02:48:28,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=13983, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17052, PETRI_PLACES=373, PETRI_TRANSITIONS=732} [2023-01-28 02:48:28,682 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-01-28 02:48:28,683 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 732 transitions, 17052 flow [2023-01-28 02:48:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 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 02:48:28,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:28,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:48:28,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-01-28 02:48:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-01-28 02:48:28,884 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:48:28,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -256187255, now seen corresponding path program 42 times [2023-01-28 02:48:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:28,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345362880] [2023-01-28 02:48:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:29,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345362880] [2023-01-28 02:48:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345362880] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331978467] [2023-01-28 02:48:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:48:29,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:29,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:29,627 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:48:29,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 02:48:29,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:48:29,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:48:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:48:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:30,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:30,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 99 [2023-01-28 02:48:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:32,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:32,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 154 [2023-01-28 02:48:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:32,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331978467] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:32,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:32,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-01-28 02:48:32,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543048405] [2023-01-28 02:48:32,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:32,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:48:32,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:32,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:48:32,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:48:32,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:48:32,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 732 transitions, 17052 flow. Second operand has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 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 02:48:32,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:32,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:48:32,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:48:36,999 INFO L130 PetriNetUnfolder]: 2132/4198 cut-off events. [2023-01-28 02:48:36,999 INFO L131 PetriNetUnfolder]: For 105703/105703 co-relation queries the response was YES. [2023-01-28 02:48:37,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39218 conditions, 4198 events. 2132/4198 cut-off events. For 105703/105703 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30945 event pairs, 569 based on Foata normal form. 8/4206 useless extension candidates. Maximal degree in co-relation 39100. Up to 3041 conditions per place. [2023-01-28 02:48:37,043 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 518 selfloop transitions, 268 changer transitions 19/805 dead transitions. [2023-01-28 02:48:37,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 805 transitions, 19399 flow [2023-01-28 02:48:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 02:48:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 02:48:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5052 transitions. [2023-01-28 02:48:37,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210472801220132 [2023-01-28 02:48:37,047 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5052 transitions. [2023-01-28 02:48:37,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5052 transitions. [2023-01-28 02:48:37,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:37,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5052 transitions. [2023-01-28 02:48:37,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 180.42857142857142) internal successors, (5052), 28 states have internal predecessors, (5052), 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 02:48:37,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 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 02:48:37,057 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 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 02:48:37,057 INFO L175 Difference]: Start difference. First operand has 373 places, 732 transitions, 17052 flow. Second operand 28 states and 5052 transitions. [2023-01-28 02:48:37,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 805 transitions, 19399 flow [2023-01-28 02:48:37,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 805 transitions, 18560 flow, removed 126 selfloop flow, removed 19 redundant places. [2023-01-28 02:48:37,866 INFO L231 Difference]: Finished difference. Result has 383 places, 746 transitions, 17151 flow [2023-01-28 02:48:37,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16124, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17151, PETRI_PLACES=383, PETRI_TRANSITIONS=746} [2023-01-28 02:48:37,867 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 362 predicate places. [2023-01-28 02:48:37,867 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 746 transitions, 17151 flow [2023-01-28 02:48:37,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 177.78571428571428) internal successors, (4978), 28 states have internal predecessors, (4978), 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 02:48:37,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:37,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:48:37,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 02:48:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-01-28 02:48:38,068 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:48:38,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1775779559, now seen corresponding path program 43 times [2023-01-28 02:48:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747747528] [2023-01-28 02:48:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:38,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747747528] [2023-01-28 02:48:38,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747747528] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:38,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147900961] [2023-01-28 02:48:38,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:48:38,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:38,651 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:48:38,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 02:48:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 02:48:38,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:39,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 126 [2023-01-28 02:48:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:39,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:40,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:40,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 218 [2023-01-28 02:48:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:41,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147900961] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:41,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:41,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:48:41,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959056823] [2023-01-28 02:48:41,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:41,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:48:41,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:48:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:48:41,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:48:41,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 746 transitions, 17151 flow. Second operand has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 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 02:48:41,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:41,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:48:41,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:48:46,429 INFO L130 PetriNetUnfolder]: 2974/6191 cut-off events. [2023-01-28 02:48:46,429 INFO L131 PetriNetUnfolder]: For 150937/150937 co-relation queries the response was YES. [2023-01-28 02:48:46,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54568 conditions, 6191 events. 2974/6191 cut-off events. For 150937/150937 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 52105 event pairs, 302 based on Foata normal form. 53/6244 useless extension candidates. Maximal degree in co-relation 54451. Up to 1948 conditions per place. [2023-01-28 02:48:46,485 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 598 selfloop transitions, 643 changer transitions 62/1303 dead transitions. [2023-01-28 02:48:46,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1303 transitions, 30822 flow [2023-01-28 02:48:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 02:48:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 02:48:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 7097 transitions. [2023-01-28 02:48:46,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323797791769322 [2023-01-28 02:48:46,490 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 7097 transitions. [2023-01-28 02:48:46,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 7097 transitions. [2023-01-28 02:48:46,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:46,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 7097 transitions. [2023-01-28 02:48:46,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 181.97435897435898) internal successors, (7097), 39 states have internal predecessors, (7097), 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 02:48:46,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 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 02:48:46,502 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 562.0) internal successors, (22480), 40 states have internal predecessors, (22480), 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 02:48:46,502 INFO L175 Difference]: Start difference. First operand has 383 places, 746 transitions, 17151 flow. Second operand 39 states and 7097 transitions. [2023-01-28 02:48:46,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1303 transitions, 30822 flow [2023-01-28 02:48:47,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1303 transitions, 30230 flow, removed 136 selfloop flow, removed 17 redundant places. [2023-01-28 02:48:47,892 INFO L231 Difference]: Finished difference. Result has 416 places, 1009 transitions, 24103 flow [2023-01-28 02:48:47,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=16666, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24103, PETRI_PLACES=416, PETRI_TRANSITIONS=1009} [2023-01-28 02:48:47,892 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-01-28 02:48:47,892 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1009 transitions, 24103 flow [2023-01-28 02:48:47,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 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 02:48:47,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:47,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:48:47,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 02:48:48,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-28 02:48:48,095 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:48:48,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash 600903337, now seen corresponding path program 44 times [2023-01-28 02:48:48,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:48,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984371343] [2023-01-28 02:48:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:48,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:48,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984371343] [2023-01-28 02:48:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984371343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987688584] [2023-01-28 02:48:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:48:48,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:48,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:48,819 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:48:48,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 02:48:48,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:48:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:48:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:48:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:49,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:49,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 128 [2023-01-28 02:48:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:49,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:52,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:52,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 170 [2023-01-28 02:48:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:52,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987688584] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:52,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:52,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-28 02:48:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674816940] [2023-01-28 02:48:52,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:52,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:48:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:48:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-01-28 02:48:52,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:48:52,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1009 transitions, 24103 flow. Second operand has 26 states, 26 states have (on average 177.73076923076923) internal successors, (4621), 26 states have internal predecessors, (4621), 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 02:48:52,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:52,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:48:52,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:49:03,919 INFO L130 PetriNetUnfolder]: 3082/6399 cut-off events. [2023-01-28 02:49:03,919 INFO L131 PetriNetUnfolder]: For 174021/174021 co-relation queries the response was YES. [2023-01-28 02:49:03,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60509 conditions, 6399 events. 3082/6399 cut-off events. For 174021/174021 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 53952 event pairs, 697 based on Foata normal form. 13/6412 useless extension candidates. Maximal degree in co-relation 60374. Up to 3639 conditions per place. [2023-01-28 02:49:03,982 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 766 selfloop transitions, 417 changer transitions 25/1208 dead transitions. [2023-01-28 02:49:03,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1208 transitions, 29630 flow [2023-01-28 02:49:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 02:49:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 02:49:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6713 transitions. [2023-01-28 02:49:03,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3228335096662499 [2023-01-28 02:49:03,987 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6713 transitions. [2023-01-28 02:49:03,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6713 transitions. [2023-01-28 02:49:03,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:49:03,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6713 transitions. [2023-01-28 02:49:03,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 181.43243243243242) internal successors, (6713), 37 states have internal predecessors, (6713), 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 02:49:03,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 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 02:49:03,999 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 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 02:49:03,999 INFO L175 Difference]: Start difference. First operand has 416 places, 1009 transitions, 24103 flow. Second operand 37 states and 6713 transitions. [2023-01-28 02:49:03,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1208 transitions, 29630 flow [2023-01-28 02:49:05,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1208 transitions, 28572 flow, removed 504 selfloop flow, removed 10 redundant places. [2023-01-28 02:49:05,893 INFO L231 Difference]: Finished difference. Result has 450 places, 1074 transitions, 25984 flow [2023-01-28 02:49:05,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=23228, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25984, PETRI_PLACES=450, PETRI_TRANSITIONS=1074} [2023-01-28 02:49:05,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 429 predicate places. [2023-01-28 02:49:05,895 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1074 transitions, 25984 flow [2023-01-28 02:49:05,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.73076923076923) internal successors, (4621), 26 states have internal predecessors, (4621), 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 02:49:05,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:49:05,895 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:49:05,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 02:49:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:06,096 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:49:06,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:49:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -300215526, now seen corresponding path program 45 times [2023-01-28 02:49:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:49:06,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722514049] [2023-01-28 02:49:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:49:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:49:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:49:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:49:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:49:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722514049] [2023-01-28 02:49:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722514049] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:49:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161519063] [2023-01-28 02:49:06,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:49:06,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:49:06,397 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:49:06,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 02:49:06,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 02:49:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:49:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 02:49:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:49:06,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-01-28 02:49:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:49:06,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:49:07,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:49:07,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2023-01-28 02:49:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 02:49:07,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161519063] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:49:07,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:49:07,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-28 02:49:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384090476] [2023-01-28 02:49:07,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:49:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 02:49:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:49:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 02:49:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-28 02:49:07,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 562 [2023-01-28 02:49:07,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1074 transitions, 25984 flow. Second operand has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 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 02:49:07,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:49:07,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 562 [2023-01-28 02:49:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:49:09,474 INFO L130 PetriNetUnfolder]: 3091/6363 cut-off events. [2023-01-28 02:49:09,475 INFO L131 PetriNetUnfolder]: For 173147/173147 co-relation queries the response was YES. [2023-01-28 02:49:09,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60412 conditions, 6363 events. 3091/6363 cut-off events. For 173147/173147 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 53158 event pairs, 1322 based on Foata normal form. 8/6371 useless extension candidates. Maximal degree in co-relation 60269. Up to 6192 conditions per place. [2023-01-28 02:49:09,549 INFO L137 encePairwiseOnDemand]: 556/562 looper letters, 1054 selfloop transitions, 43 changer transitions 0/1097 dead transitions. [2023-01-28 02:49:09,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1097 transitions, 28461 flow [2023-01-28 02:49:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 02:49:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 02:49:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1523 transitions. [2023-01-28 02:49:09,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387455516014235 [2023-01-28 02:49:09,550 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1523 transitions. [2023-01-28 02:49:09,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1523 transitions. [2023-01-28 02:49:09,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:49:09,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1523 transitions. [2023-01-28 02:49:09,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 190.375) internal successors, (1523), 8 states have internal predecessors, (1523), 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 02:49:09,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 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 02:49:09,554 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 562.0) internal successors, (5058), 9 states have internal predecessors, (5058), 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 02:49:09,554 INFO L175 Difference]: Start difference. First operand has 450 places, 1074 transitions, 25984 flow. Second operand 8 states and 1523 transitions. [2023-01-28 02:49:09,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1097 transitions, 28461 flow [2023-01-28 02:49:11,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1097 transitions, 27989 flow, removed 157 selfloop flow, removed 19 redundant places. [2023-01-28 02:49:11,524 INFO L231 Difference]: Finished difference. Result has 436 places, 1076 transitions, 25649 flow [2023-01-28 02:49:11,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25512, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25649, PETRI_PLACES=436, PETRI_TRANSITIONS=1076} [2023-01-28 02:49:11,525 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2023-01-28 02:49:11,525 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1076 transitions, 25649 flow [2023-01-28 02:49:11,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.11111111111111) internal successors, (3368), 18 states have internal predecessors, (3368), 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 02:49:11,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:49:11,526 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:49:11,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 02:49:11,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:11,732 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:49:11,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:49:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2051486215, now seen corresponding path program 46 times [2023-01-28 02:49:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:49:11,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018613547] [2023-01-28 02:49:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:49:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:49:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:49:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:12,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:49:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018613547] [2023-01-28 02:49:12,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018613547] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:49:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022272058] [2023-01-28 02:49:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:49:12,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:49:12,346 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:49:12,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 02:49:12,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:49:12,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:49:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 02:49:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:49:13,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:49:13,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 133 [2023-01-28 02:49:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:13,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:49:15,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:49:15,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 361 treesize of output 212 [2023-01-28 02:49:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:15,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022272058] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:49:15,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:49:15,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:49:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948988114] [2023-01-28 02:49:15,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:49:15,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:49:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:49:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:49:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:49:15,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:49:15,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1076 transitions, 25649 flow. Second operand has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 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 02:49:15,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:49:15,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:49:15,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:49:23,888 INFO L130 PetriNetUnfolder]: 3448/7011 cut-off events. [2023-01-28 02:49:23,888 INFO L131 PetriNetUnfolder]: For 190618/190618 co-relation queries the response was YES. [2023-01-28 02:49:23,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65742 conditions, 7011 events. 3448/7011 cut-off events. For 190618/190618 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 58880 event pairs, 758 based on Foata normal form. 9/7020 useless extension candidates. Maximal degree in co-relation 65601. Up to 3850 conditions per place. [2023-01-28 02:49:23,955 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 888 selfloop transitions, 449 changer transitions 21/1358 dead transitions. [2023-01-28 02:49:23,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1358 transitions, 33327 flow [2023-01-28 02:49:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 02:49:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 02:49:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6711 transitions. [2023-01-28 02:49:23,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227373280754064 [2023-01-28 02:49:23,960 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6711 transitions. [2023-01-28 02:49:23,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6711 transitions. [2023-01-28 02:49:23,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:49:23,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6711 transitions. [2023-01-28 02:49:23,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 181.3783783783784) internal successors, (6711), 37 states have internal predecessors, (6711), 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 02:49:23,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 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 02:49:23,973 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 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 02:49:23,973 INFO L175 Difference]: Start difference. First operand has 436 places, 1076 transitions, 25649 flow. Second operand 37 states and 6711 transitions. [2023-01-28 02:49:23,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1358 transitions, 33327 flow [2023-01-28 02:49:26,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1358 transitions, 33244 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 02:49:26,051 INFO L231 Difference]: Finished difference. Result has 476 places, 1197 transitions, 29697 flow [2023-01-28 02:49:26,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=25568, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=29697, PETRI_PLACES=476, PETRI_TRANSITIONS=1197} [2023-01-28 02:49:26,052 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2023-01-28 02:49:26,052 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1197 transitions, 29697 flow [2023-01-28 02:49:26,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 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 02:49:26,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:49:26,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:49:26,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 02:49:26,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:26,258 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:49:26,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:49:26,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1744538243, now seen corresponding path program 47 times [2023-01-28 02:49:26,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:49:26,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088185577] [2023-01-28 02:49:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:49:26,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:49:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:49:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:26,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:49:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088185577] [2023-01-28 02:49:26,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088185577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:49:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447132248] [2023-01-28 02:49:26,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:49:26,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:49:26,859 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:49:26,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 02:49:27,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:49:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:49:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 02:49:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:49:27,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:49:27,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 126 [2023-01-28 02:49:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:49:27,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:49:30,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:49:30,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 213 [2023-01-28 02:49:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:30,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447132248] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:49:30,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:49:30,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 30 [2023-01-28 02:49:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146242676] [2023-01-28 02:49:30,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:49:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 02:49:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:49:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 02:49:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-01-28 02:49:30,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 562 [2023-01-28 02:49:30,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1197 transitions, 29697 flow. Second operand has 31 states, 31 states have (on average 172.8709677419355) internal successors, (5359), 31 states have internal predecessors, (5359), 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 02:49:30,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:49:30,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 562 [2023-01-28 02:49:30,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:49:40,361 INFO L130 PetriNetUnfolder]: 3651/7459 cut-off events. [2023-01-28 02:49:40,361 INFO L131 PetriNetUnfolder]: For 222256/222256 co-relation queries the response was YES. [2023-01-28 02:49:40,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73095 conditions, 7459 events. 3651/7459 cut-off events. For 222256/222256 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63808 event pairs, 839 based on Foata normal form. 13/7472 useless extension candidates. Maximal degree in co-relation 72944. Up to 4356 conditions per place. [2023-01-28 02:49:40,441 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 941 selfloop transitions, 466 changer transitions 25/1432 dead transitions. [2023-01-28 02:49:40,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1432 transitions, 36724 flow [2023-01-28 02:49:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 02:49:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 02:49:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 7221 transitions. [2023-01-28 02:49:40,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3133842548389897 [2023-01-28 02:49:40,446 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 7221 transitions. [2023-01-28 02:49:40,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 7221 transitions. [2023-01-28 02:49:40,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:49:40,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 7221 transitions. [2023-01-28 02:49:40,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 176.1219512195122) internal successors, (7221), 41 states have internal predecessors, (7221), 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 02:49:40,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 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 02:49:40,459 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 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 02:49:40,459 INFO L175 Difference]: Start difference. First operand has 476 places, 1197 transitions, 29697 flow. Second operand 41 states and 7221 transitions. [2023-01-28 02:49:40,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1432 transitions, 36724 flow [2023-01-28 02:49:43,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1432 transitions, 35889 flow, removed 398 selfloop flow, removed 10 redundant places. [2023-01-28 02:49:43,283 INFO L231 Difference]: Finished difference. Result has 519 places, 1290 transitions, 32655 flow [2023-01-28 02:49:43,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=28899, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32655, PETRI_PLACES=519, PETRI_TRANSITIONS=1290} [2023-01-28 02:49:43,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 498 predicate places. [2023-01-28 02:49:43,284 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1290 transitions, 32655 flow [2023-01-28 02:49:43,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 172.8709677419355) internal successors, (5359), 31 states have internal predecessors, (5359), 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 02:49:43,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:49:43,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:49:43,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 02:49:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-01-28 02:49:43,489 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:49:43,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:49:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash -131688167, now seen corresponding path program 48 times [2023-01-28 02:49:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:49:43,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882288278] [2023-01-28 02:49:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:49:43,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:49:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:49:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:49:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:49:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882288278] [2023-01-28 02:49:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882288278] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:49:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783511081] [2023-01-28 02:49:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:49:44,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:49:44,500 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:49:44,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 02:49:44,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:49:44,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:49:44,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:49:44,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:49:45,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 84 [2023-01-28 02:49:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:45,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:49:46,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:49:46,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 137 [2023-01-28 02:49:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783511081] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:49:46,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:49:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 02:49:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104421857] [2023-01-28 02:49:46,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:49:46,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:49:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:49:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:49:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:49:46,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:49:46,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1290 transitions, 32655 flow. Second operand has 32 states, 32 states have (on average 161.59375) internal successors, (5171), 32 states have internal predecessors, (5171), 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 02:49:46,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:49:46,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:49:46,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:49:55,474 INFO L130 PetriNetUnfolder]: 3966/8108 cut-off events. [2023-01-28 02:49:55,475 INFO L131 PetriNetUnfolder]: For 255171/255171 co-relation queries the response was YES. [2023-01-28 02:49:55,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81258 conditions, 8108 events. 3966/8108 cut-off events. For 255171/255171 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 70497 event pairs, 910 based on Foata normal form. 39/8147 useless extension candidates. Maximal degree in co-relation 81092. Up to 4307 conditions per place. [2023-01-28 02:49:55,559 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1062 selfloop transitions, 451 changer transitions 47/1560 dead transitions. [2023-01-28 02:49:55,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1560 transitions, 41470 flow [2023-01-28 02:49:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 02:49:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 02:49:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6765 transitions. [2023-01-28 02:49:55,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29359430604982206 [2023-01-28 02:49:55,564 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6765 transitions. [2023-01-28 02:49:55,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6765 transitions. [2023-01-28 02:49:55,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:49:55,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6765 transitions. [2023-01-28 02:49:55,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 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 02:49:55,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 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 02:49:55,576 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 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 02:49:55,576 INFO L175 Difference]: Start difference. First operand has 519 places, 1290 transitions, 32655 flow. Second operand 41 states and 6765 transitions. [2023-01-28 02:49:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1560 transitions, 41470 flow [2023-01-28 02:49:58,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1560 transitions, 39635 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-01-28 02:49:58,579 INFO L231 Difference]: Finished difference. Result has 547 places, 1402 transitions, 35645 flow [2023-01-28 02:49:58,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=30610, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=35645, PETRI_PLACES=547, PETRI_TRANSITIONS=1402} [2023-01-28 02:49:58,580 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-01-28 02:49:58,580 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1402 transitions, 35645 flow [2023-01-28 02:49:58,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.59375) internal successors, (5171), 32 states have internal predecessors, (5171), 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 02:49:58,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:49:58,581 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:49:58,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 02:49:58,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-28 02:49:58,781 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:49:58,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:49:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash -195925735, now seen corresponding path program 49 times [2023-01-28 02:49:58,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:49:58,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239730338] [2023-01-28 02:49:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:49:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:49:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:49:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:49:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:49:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239730338] [2023-01-28 02:49:59,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239730338] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:49:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860842523] [2023-01-28 02:49:59,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:49:59,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:49:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:49:59,470 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:49:59,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 02:49:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:49:59,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 02:49:59,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:50:00,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 112 [2023-01-28 02:50:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:50:00,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:50:01,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:50:01,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 355 treesize of output 215 [2023-01-28 02:50:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:01,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860842523] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:50:01,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:50:01,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2023-01-28 02:50:01,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644932608] [2023-01-28 02:50:01,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:50:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 02:50:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:50:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 02:50:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-01-28 02:50:01,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 562 [2023-01-28 02:50:01,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1402 transitions, 35645 flow. Second operand has 28 states, 28 states have (on average 172.75) internal successors, (4837), 28 states have internal predecessors, (4837), 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 02:50:01,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:50:01,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 562 [2023-01-28 02:50:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:50:08,387 INFO L130 PetriNetUnfolder]: 4124/8285 cut-off events. [2023-01-28 02:50:08,388 INFO L131 PetriNetUnfolder]: For 269918/269918 co-relation queries the response was YES. [2023-01-28 02:50:08,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83964 conditions, 8285 events. 4124/8285 cut-off events. For 269918/269918 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 71093 event pairs, 613 based on Foata normal form. 6/8291 useless extension candidates. Maximal degree in co-relation 83786. Up to 3011 conditions per place. [2023-01-28 02:50:08,483 INFO L137 encePairwiseOnDemand]: 552/562 looper letters, 918 selfloop transitions, 651 changer transitions 19/1588 dead transitions. [2023-01-28 02:50:08,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1588 transitions, 42956 flow [2023-01-28 02:50:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 02:50:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 02:50:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5443 transitions. [2023-01-28 02:50:08,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31242107679944897 [2023-01-28 02:50:08,487 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5443 transitions. [2023-01-28 02:50:08,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5443 transitions. [2023-01-28 02:50:08,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:50:08,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5443 transitions. [2023-01-28 02:50:08,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 175.58064516129033) internal successors, (5443), 31 states have internal predecessors, (5443), 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 02:50:08,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:50:08,497 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:50:08,497 INFO L175 Difference]: Start difference. First operand has 547 places, 1402 transitions, 35645 flow. Second operand 31 states and 5443 transitions. [2023-01-28 02:50:08,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1588 transitions, 42956 flow [2023-01-28 02:50:12,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1588 transitions, 42032 flow, removed 414 selfloop flow, removed 18 redundant places. [2023-01-28 02:50:12,203 INFO L231 Difference]: Finished difference. Result has 566 places, 1514 transitions, 39639 flow [2023-01-28 02:50:12,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=34765, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=39639, PETRI_PLACES=566, PETRI_TRANSITIONS=1514} [2023-01-28 02:50:12,204 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 545 predicate places. [2023-01-28 02:50:12,204 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1514 transitions, 39639 flow [2023-01-28 02:50:12,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 172.75) internal successors, (4837), 28 states have internal predecessors, (4837), 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 02:50:12,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:50:12,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:50:12,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 02:50:12,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:50:12,405 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:50:12,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:50:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1146111613, now seen corresponding path program 50 times [2023-01-28 02:50:12,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:50:12,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850151151] [2023-01-28 02:50:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:50:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:50:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:50:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:13,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:50:13,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850151151] [2023-01-28 02:50:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850151151] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:50:13,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019489385] [2023-01-28 02:50:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:50:13,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:50:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:50:13,278 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:50:13,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 02:50:13,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:50:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:50:13,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:50:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:50:14,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:50:14,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-01-28 02:50:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:14,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:50:16,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:50:16,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 360 treesize of output 188 [2023-01-28 02:50:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019489385] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:50:16,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:50:16,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-28 02:50:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728333008] [2023-01-28 02:50:16,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:50:16,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:50:16,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:50:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:50:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-01-28 02:50:16,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:50:16,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1514 transitions, 39639 flow. Second operand has 26 states, 26 states have (on average 177.84615384615384) internal successors, (4624), 26 states have internal predecessors, (4624), 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 02:50:16,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:50:16,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:50:16,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:50:24,151 INFO L130 PetriNetUnfolder]: 4209/8422 cut-off events. [2023-01-28 02:50:24,151 INFO L131 PetriNetUnfolder]: For 290393/290393 co-relation queries the response was YES. [2023-01-28 02:50:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87118 conditions, 8422 events. 4209/8422 cut-off events. For 290393/290393 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 72307 event pairs, 732 based on Foata normal form. 8/8430 useless extension candidates. Maximal degree in co-relation 86939. Up to 3180 conditions per place. [2023-01-28 02:50:24,255 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1034 selfloop transitions, 580 changer transitions 25/1639 dead transitions. [2023-01-28 02:50:24,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1639 transitions, 44515 flow [2023-01-28 02:50:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 02:50:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 02:50:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6509 transitions. [2023-01-28 02:50:24,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217180703835508 [2023-01-28 02:50:24,259 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6509 transitions. [2023-01-28 02:50:24,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6509 transitions. [2023-01-28 02:50:24,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:50:24,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6509 transitions. [2023-01-28 02:50:24,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 180.80555555555554) internal successors, (6509), 36 states have internal predecessors, (6509), 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 02:50:24,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 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 02:50:24,271 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 562.0) internal successors, (20794), 37 states have internal predecessors, (20794), 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 02:50:24,271 INFO L175 Difference]: Start difference. First operand has 566 places, 1514 transitions, 39639 flow. Second operand 36 states and 6509 transitions. [2023-01-28 02:50:24,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1639 transitions, 44515 flow [2023-01-28 02:50:28,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1639 transitions, 43341 flow, removed 445 selfloop flow, removed 17 redundant places. [2023-01-28 02:50:28,565 INFO L231 Difference]: Finished difference. Result has 590 places, 1549 transitions, 40749 flow [2023-01-28 02:50:28,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=38481, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=40749, PETRI_PLACES=590, PETRI_TRANSITIONS=1549} [2023-01-28 02:50:28,567 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 569 predicate places. [2023-01-28 02:50:28,567 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 1549 transitions, 40749 flow [2023-01-28 02:50:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.84615384615384) internal successors, (4624), 26 states have internal predecessors, (4624), 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 02:50:28,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:50:28,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:50:28,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 02:50:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-01-28 02:50:28,773 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:50:28,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:50:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2034591411, now seen corresponding path program 51 times [2023-01-28 02:50:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:50:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455203880] [2023-01-28 02:50:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:50:28,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:50:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:50:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:29,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:50:29,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455203880] [2023-01-28 02:50:29,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455203880] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:50:29,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438316958] [2023-01-28 02:50:29,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:50:29,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:50:29,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:50:29,579 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:50:29,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 02:50:29,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:50:29,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:50:29,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 02:50:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:50:30,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:50:30,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 123 [2023-01-28 02:50:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:31,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:50:33,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:50:33,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 211 [2023-01-28 02:50:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438316958] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:50:33,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:50:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2023-01-28 02:50:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104779835] [2023-01-28 02:50:33,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:50:33,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 02:50:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:50:33,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 02:50:33,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-01-28 02:50:33,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:50:33,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 1549 transitions, 40749 flow. Second operand has 30 states, 30 states have (on average 177.9) internal successors, (5337), 30 states have internal predecessors, (5337), 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 02:50:33,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:50:33,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:50:33,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:50:42,091 INFO L130 PetriNetUnfolder]: 4383/8793 cut-off events. [2023-01-28 02:50:42,091 INFO L131 PetriNetUnfolder]: For 315598/315598 co-relation queries the response was YES. [2023-01-28 02:50:42,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91956 conditions, 8793 events. 4383/8793 cut-off events. For 315598/315598 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 76302 event pairs, 746 based on Foata normal form. 7/8800 useless extension candidates. Maximal degree in co-relation 91770. Up to 3252 conditions per place. [2023-01-28 02:50:42,201 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1010 selfloop transitions, 682 changer transitions 13/1705 dead transitions. [2023-01-28 02:50:42,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1705 transitions, 47634 flow [2023-01-28 02:50:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 02:50:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 02:50:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5608 transitions. [2023-01-28 02:50:42,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32189186086557225 [2023-01-28 02:50:42,204 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5608 transitions. [2023-01-28 02:50:42,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5608 transitions. [2023-01-28 02:50:42,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:50:42,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5608 transitions. [2023-01-28 02:50:42,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 180.90322580645162) internal successors, (5608), 31 states have internal predecessors, (5608), 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 02:50:42,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:50:42,214 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:50:42,214 INFO L175 Difference]: Start difference. First operand has 590 places, 1549 transitions, 40749 flow. Second operand 31 states and 5608 transitions. [2023-01-28 02:50:42,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1705 transitions, 47634 flow [2023-01-28 02:50:46,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1705 transitions, 47179 flow, removed 173 selfloop flow, removed 16 redundant places. [2023-01-28 02:50:46,136 INFO L231 Difference]: Finished difference. Result has 608 places, 1610 transitions, 43876 flow [2023-01-28 02:50:46,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=40314, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43876, PETRI_PLACES=608, PETRI_TRANSITIONS=1610} [2023-01-28 02:50:46,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 587 predicate places. [2023-01-28 02:50:46,138 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1610 transitions, 43876 flow [2023-01-28 02:50:46,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 177.9) internal successors, (5337), 30 states have internal predecessors, (5337), 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 02:50:46,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:50:46,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:50:46,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-28 02:50:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-28 02:50:46,339 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:50:46,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:50:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -956207045, now seen corresponding path program 52 times [2023-01-28 02:50:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:50:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758699175] [2023-01-28 02:50:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:50:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:50:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:50:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:47,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:50:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758699175] [2023-01-28 02:50:47,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758699175] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:50:47,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352714349] [2023-01-28 02:50:47,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:50:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:50:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:50:47,206 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:50:47,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 02:50:47,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:50:47,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:50:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 02:50:47,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:50:47,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 112 [2023-01-28 02:50:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:50:49,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:50:49,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 200 [2023-01-28 02:50:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352714349] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:50:50,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:50:50,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:50:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342467565] [2023-01-28 02:50:50,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:50:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:50:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:50:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:50:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:50:50,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:50:50,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1610 transitions, 43876 flow. Second operand has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 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 02:50:50,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:50:50,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:50:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:51:00,215 INFO L130 PetriNetUnfolder]: 5064/9904 cut-off events. [2023-01-28 02:51:00,216 INFO L131 PetriNetUnfolder]: For 403831/403831 co-relation queries the response was YES. [2023-01-28 02:51:00,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109305 conditions, 9904 events. 5064/9904 cut-off events. For 403831/403831 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 85422 event pairs, 1002 based on Foata normal form. 11/9915 useless extension candidates. Maximal degree in co-relation 109112. Up to 4962 conditions per place. [2023-01-28 02:51:00,349 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1314 selfloop transitions, 623 changer transitions 26/1963 dead transitions. [2023-01-28 02:51:00,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1963 transitions, 56683 flow [2023-01-28 02:51:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 02:51:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 02:51:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 7254 transitions. [2023-01-28 02:51:00,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32268683274021354 [2023-01-28 02:51:00,354 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 7254 transitions. [2023-01-28 02:51:00,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 7254 transitions. [2023-01-28 02:51:00,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:51:00,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 7254 transitions. [2023-01-28 02:51:00,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 181.35) internal successors, (7254), 40 states have internal predecessors, (7254), 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 02:51:00,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 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 02:51:00,367 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 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 02:51:00,367 INFO L175 Difference]: Start difference. First operand has 608 places, 1610 transitions, 43876 flow. Second operand 40 states and 7254 transitions. [2023-01-28 02:51:00,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1963 transitions, 56683 flow [2023-01-28 02:51:05,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1963 transitions, 56194 flow, removed 224 selfloop flow, removed 13 redundant places. [2023-01-28 02:51:05,534 INFO L231 Difference]: Finished difference. Result has 645 places, 1809 transitions, 51704 flow [2023-01-28 02:51:05,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=43399, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51704, PETRI_PLACES=645, PETRI_TRANSITIONS=1809} [2023-01-28 02:51:05,535 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-01-28 02:51:05,535 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1809 transitions, 51704 flow [2023-01-28 02:51:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.85185185185185) internal successors, (4802), 27 states have internal predecessors, (4802), 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 02:51:05,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:51:05,536 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:51:05,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 02:51:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:51:05,737 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:51:05,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:51:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1734035139, now seen corresponding path program 53 times [2023-01-28 02:51:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:51:05,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783733566] [2023-01-28 02:51:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:51:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:51:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:51:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:51:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783733566] [2023-01-28 02:51:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783733566] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:51:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582776259] [2023-01-28 02:51:06,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:51:06,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:51:06,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:51:06,529 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:51:06,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 02:51:06,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:51:06,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:51:06,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 02:51:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:51:07,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 100 [2023-01-28 02:51:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:07,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:51:09,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:51:09,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 216 [2023-01-28 02:51:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:09,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582776259] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:51:09,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:51:09,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-01-28 02:51:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619935512] [2023-01-28 02:51:09,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:51:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:51:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:51:09,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:51:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:51:09,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:51:09,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1809 transitions, 51704 flow. Second operand has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 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 02:51:09,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:51:09,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:51:09,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:51:19,670 INFO L130 PetriNetUnfolder]: 5221/10184 cut-off events. [2023-01-28 02:51:19,670 INFO L131 PetriNetUnfolder]: For 442274/442274 co-relation queries the response was YES. [2023-01-28 02:51:19,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116369 conditions, 10184 events. 5221/10184 cut-off events. For 442274/442274 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 87950 event pairs, 801 based on Foata normal form. 24/10208 useless extension candidates. Maximal degree in co-relation 116163. Up to 3528 conditions per place. [2023-01-28 02:51:19,809 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1231 selfloop transitions, 735 changer transitions 17/1983 dead transitions. [2023-01-28 02:51:19,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1983 transitions, 60096 flow [2023-01-28 02:51:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 02:51:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 02:51:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5256 transitions. [2023-01-28 02:51:19,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32249355749171676 [2023-01-28 02:51:19,813 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5256 transitions. [2023-01-28 02:51:19,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5256 transitions. [2023-01-28 02:51:19,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:51:19,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5256 transitions. [2023-01-28 02:51:19,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 181.24137931034483) internal successors, (5256), 29 states have internal predecessors, (5256), 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 02:51:19,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 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 02:51:19,824 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 562.0) internal successors, (16860), 30 states have internal predecessors, (16860), 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 02:51:19,824 INFO L175 Difference]: Start difference. First operand has 645 places, 1809 transitions, 51704 flow. Second operand 29 states and 5256 transitions. [2023-01-28 02:51:19,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1983 transitions, 60096 flow [2023-01-28 02:51:25,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1983 transitions, 58103 flow, removed 953 selfloop flow, removed 14 redundant places. [2023-01-28 02:51:25,733 INFO L231 Difference]: Finished difference. Result has 664 places, 1892 transitions, 54797 flow [2023-01-28 02:51:25,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=49579, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54797, PETRI_PLACES=664, PETRI_TRANSITIONS=1892} [2023-01-28 02:51:25,734 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 643 predicate places. [2023-01-28 02:51:25,735 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1892 transitions, 54797 flow [2023-01-28 02:51:25,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 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 02:51:25,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:51:25,735 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:51:25,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-28 02:51:25,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:51:25,936 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:51:25,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:51:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -649434927, now seen corresponding path program 54 times [2023-01-28 02:51:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:51:25,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564728809] [2023-01-28 02:51:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:51:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:51:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:51:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:51:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564728809] [2023-01-28 02:51:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564728809] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:51:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315535902] [2023-01-28 02:51:26,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:51:26,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:51:26,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:51:26,541 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:51:26,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 02:51:26,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:51:26,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:51:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 02:51:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:51:27,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:51:27,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 86 [2023-01-28 02:51:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:27,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:51:29,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:51:29,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 347 treesize of output 211 [2023-01-28 02:51:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315535902] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:51:30,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:51:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:51:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166244955] [2023-01-28 02:51:30,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:51:30,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:51:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:51:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:51:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:51:30,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:51:30,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1892 transitions, 54797 flow. Second operand has 27 states, 27 states have (on average 177.74074074074073) internal successors, (4799), 27 states have internal predecessors, (4799), 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 02:51:30,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:51:30,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:51:30,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:51:40,513 INFO L130 PetriNetUnfolder]: 5326/10362 cut-off events. [2023-01-28 02:51:40,513 INFO L131 PetriNetUnfolder]: For 463816/463816 co-relation queries the response was YES. [2023-01-28 02:51:40,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119532 conditions, 10362 events. 5326/10362 cut-off events. For 463816/463816 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 89578 event pairs, 844 based on Foata normal form. 9/10371 useless extension candidates. Maximal degree in co-relation 119320. Up to 3780 conditions per place. [2023-01-28 02:51:40,673 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1199 selfloop transitions, 833 changer transitions 22/2054 dead transitions. [2023-01-28 02:51:40,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2054 transitions, 63044 flow [2023-01-28 02:51:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 02:51:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 02:51:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4882 transitions. [2023-01-28 02:51:40,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217345459338342 [2023-01-28 02:51:40,677 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4882 transitions. [2023-01-28 02:51:40,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4882 transitions. [2023-01-28 02:51:40,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:51:40,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4882 transitions. [2023-01-28 02:51:40,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 180.8148148148148) internal successors, (4882), 27 states have internal predecessors, (4882), 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 02:51:40,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 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 02:51:40,686 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 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 02:51:40,686 INFO L175 Difference]: Start difference. First operand has 664 places, 1892 transitions, 54797 flow. Second operand 27 states and 4882 transitions. [2023-01-28 02:51:40,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2054 transitions, 63044 flow [2023-01-28 02:51:47,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2054 transitions, 62329 flow, removed 307 selfloop flow, removed 19 redundant places. [2023-01-28 02:51:47,048 INFO L231 Difference]: Finished difference. Result has 683 places, 1966 transitions, 59469 flow [2023-01-28 02:51:47,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=54090, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=762, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1092, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59469, PETRI_PLACES=683, PETRI_TRANSITIONS=1966} [2023-01-28 02:51:47,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 662 predicate places. [2023-01-28 02:51:47,050 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 1966 transitions, 59469 flow [2023-01-28 02:51:47,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.74074074074073) internal successors, (4799), 27 states have internal predecessors, (4799), 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 02:51:47,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:51:47,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:51:47,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 02:51:47,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:51:47,256 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:51:47,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:51:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1697031517, now seen corresponding path program 55 times [2023-01-28 02:51:47,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:51:47,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006223841] [2023-01-28 02:51:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:51:47,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:51:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:51:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:51:48,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:51:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006223841] [2023-01-28 02:51:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006223841] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:51:48,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666825185] [2023-01-28 02:51:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:51:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:51:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:51:48,022 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:51:48,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 02:51:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:51:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 02:51:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:51:48,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:51:48,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 118 [2023-01-28 02:51:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:51:51,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:51:51,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 195 [2023-01-28 02:51:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:51,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666825185] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:51:51,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:51:51,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 02:51:51,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467464786] [2023-01-28 02:51:51,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:51:51,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:51:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:51:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:51:51,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:51:51,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:51:51,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 1966 transitions, 59469 flow. Second operand has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 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 02:51:51,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:51:51,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:51:51,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:52:06,327 INFO L130 PetriNetUnfolder]: 5350/10392 cut-off events. [2023-01-28 02:52:06,328 INFO L131 PetriNetUnfolder]: For 527893/527893 co-relation queries the response was YES. [2023-01-28 02:52:06,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124174 conditions, 10392 events. 5350/10392 cut-off events. For 527893/527893 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 89739 event pairs, 668 based on Foata normal form. 4/10396 useless extension candidates. Maximal degree in co-relation 123951. Up to 3187 conditions per place. [2023-01-28 02:52:06,494 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 868 selfloop transitions, 1208 changer transitions 7/2083 dead transitions. [2023-01-28 02:52:06,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2083 transitions, 65648 flow [2023-01-28 02:52:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 02:52:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 02:52:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6568 transitions. [2023-01-28 02:52:06,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2921708185053381 [2023-01-28 02:52:06,498 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6568 transitions. [2023-01-28 02:52:06,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6568 transitions. [2023-01-28 02:52:06,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:52:06,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6568 transitions. [2023-01-28 02:52:06,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 164.2) internal successors, (6568), 40 states have internal predecessors, (6568), 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 02:52:06,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 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 02:52:06,512 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 562.0) internal successors, (23042), 41 states have internal predecessors, (23042), 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 02:52:06,512 INFO L175 Difference]: Start difference. First operand has 683 places, 1966 transitions, 59469 flow. Second operand 40 states and 6568 transitions. [2023-01-28 02:52:06,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2083 transitions, 65648 flow [2023-01-28 02:52:14,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 2083 transitions, 65094 flow, removed 241 selfloop flow, removed 13 redundant places. [2023-01-28 02:52:14,623 INFO L231 Difference]: Finished difference. Result has 708 places, 2010 transitions, 62946 flow [2023-01-28 02:52:14,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=58941, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=62946, PETRI_PLACES=708, PETRI_TRANSITIONS=2010} [2023-01-28 02:52:14,625 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 687 predicate places. [2023-01-28 02:52:14,625 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 2010 transitions, 62946 flow [2023-01-28 02:52:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 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 02:52:14,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:52:14,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:52:14,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 02:52:14,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:52:14,829 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:52:14,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:52:14,829 INFO L85 PathProgramCache]: Analyzing trace with hash 962861267, now seen corresponding path program 56 times [2023-01-28 02:52:14,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:52:14,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312062125] [2023-01-28 02:52:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:52:14,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:52:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:52:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:52:15,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:52:15,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312062125] [2023-01-28 02:52:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312062125] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:52:15,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776357510] [2023-01-28 02:52:15,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:52:15,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:52:15,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:52:15,718 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:52:15,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 02:52:15,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:52:15,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:52:15,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:52:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:52:16,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:52:16,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 121 [2023-01-28 02:52:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:52:17,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:52:19,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:52:19,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 203 [2023-01-28 02:52:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:52:19,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776357510] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:52:19,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:52:19,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 02:52:19,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973521033] [2023-01-28 02:52:19,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:52:19,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:52:19,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:52:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:52:19,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:52:19,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:52:19,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 2010 transitions, 62946 flow. Second operand has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 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 02:52:19,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:52:19,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:52:19,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:52:34,302 INFO L130 PetriNetUnfolder]: 5528/10726 cut-off events. [2023-01-28 02:52:34,302 INFO L131 PetriNetUnfolder]: For 585054/585054 co-relation queries the response was YES. [2023-01-28 02:52:34,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131969 conditions, 10726 events. 5528/10726 cut-off events. For 585054/585054 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 92967 event pairs, 1199 based on Foata normal form. 13/10739 useless extension candidates. Maximal degree in co-relation 131745. Up to 6082 conditions per place. [2023-01-28 02:52:34,452 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1451 selfloop transitions, 748 changer transitions 23/2222 dead transitions. [2023-01-28 02:52:34,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 2222 transitions, 72174 flow [2023-01-28 02:52:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 02:52:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 02:52:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6925 transitions. [2023-01-28 02:52:34,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29338247754617863 [2023-01-28 02:52:34,457 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6925 transitions. [2023-01-28 02:52:34,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6925 transitions. [2023-01-28 02:52:34,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:52:34,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6925 transitions. [2023-01-28 02:52:34,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 164.88095238095238) internal successors, (6925), 42 states have internal predecessors, (6925), 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 02:52:34,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 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 02:52:34,470 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 562.0) internal successors, (24166), 43 states have internal predecessors, (24166), 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 02:52:34,470 INFO L175 Difference]: Start difference. First operand has 708 places, 2010 transitions, 62946 flow. Second operand 42 states and 6925 transitions. [2023-01-28 02:52:34,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 2222 transitions, 72174 flow [2023-01-28 02:52:43,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2222 transitions, 69362 flow, removed 217 selfloop flow, removed 28 redundant places. [2023-01-28 02:52:43,379 INFO L231 Difference]: Finished difference. Result has 729 places, 2079 transitions, 64213 flow [2023-01-28 02:52:43,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=60239, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=64213, PETRI_PLACES=729, PETRI_TRANSITIONS=2079} [2023-01-28 02:52:43,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 708 predicate places. [2023-01-28 02:52:43,380 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 2079 transitions, 64213 flow [2023-01-28 02:52:43,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 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 02:52:43,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:52:43,381 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:52:43,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-28 02:52:43,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-01-28 02:52:43,582 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:52:43,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:52:43,582 INFO L85 PathProgramCache]: Analyzing trace with hash 939150035, now seen corresponding path program 57 times [2023-01-28 02:52:43,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:52:43,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226321827] [2023-01-28 02:52:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:52:43,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:52:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:52:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:52:44,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:52:44,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226321827] [2023-01-28 02:52:44,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226321827] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:52:44,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245785537] [2023-01-28 02:52:44,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:52:44,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:52:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:52:44,171 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:52:44,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 02:52:44,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:52:44,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:52:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:52:44,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:52:45,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:52:45,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 134 [2023-01-28 02:52:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:52:45,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:52:46,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:52:46,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 257 treesize of output 163 [2023-01-28 02:52:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:52:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245785537] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:52:46,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:52:46,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-01-28 02:52:46,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717825629] [2023-01-28 02:52:46,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:52:46,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 02:52:46,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:52:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 02:52:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-01-28 02:52:46,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:52:46,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 2079 transitions, 64213 flow. Second operand has 29 states, 29 states have (on average 177.82758620689654) internal successors, (5157), 29 states have internal predecessors, (5157), 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 02:52:46,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:52:46,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:52:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:52:59,026 INFO L130 PetriNetUnfolder]: 5554/10767 cut-off events. [2023-01-28 02:52:59,026 INFO L131 PetriNetUnfolder]: For 554874/554874 co-relation queries the response was YES. [2023-01-28 02:52:59,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130728 conditions, 10767 events. 5554/10767 cut-off events. For 554874/554874 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 93464 event pairs, 16 based on Foata normal form. 6/10773 useless extension candidates. Maximal degree in co-relation 130496. Up to 5198 conditions per place. [2023-01-28 02:52:59,175 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1215 selfloop transitions, 1061 changer transitions 12/2288 dead transitions. [2023-01-28 02:52:59,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 2288 transitions, 72763 flow [2023-01-28 02:52:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 02:52:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 02:52:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 6146 transitions. [2023-01-28 02:52:59,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216453841323006 [2023-01-28 02:52:59,179 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 6146 transitions. [2023-01-28 02:52:59,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 6146 transitions. [2023-01-28 02:52:59,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:52:59,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 6146 transitions. [2023-01-28 02:52:59,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 180.76470588235293) internal successors, (6146), 34 states have internal predecessors, (6146), 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 02:52:59,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 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 02:52:59,189 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 562.0) internal successors, (19670), 35 states have internal predecessors, (19670), 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 02:52:59,190 INFO L175 Difference]: Start difference. First operand has 729 places, 2079 transitions, 64213 flow. Second operand 34 states and 6146 transitions. [2023-01-28 02:52:59,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 2288 transitions, 72763 flow [2023-01-28 02:53:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 2288 transitions, 71782 flow, removed 262 selfloop flow, removed 29 redundant places. [2023-01-28 02:53:06,565 INFO L231 Difference]: Finished difference. Result has 739 places, 2109 transitions, 66480 flow [2023-01-28 02:53:06,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=63306, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1036, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=66480, PETRI_PLACES=739, PETRI_TRANSITIONS=2109} [2023-01-28 02:53:06,567 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-01-28 02:53:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 2109 transitions, 66480 flow [2023-01-28 02:53:06,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 177.82758620689654) internal successors, (5157), 29 states have internal predecessors, (5157), 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 02:53:06,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:53:06,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:53:06,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 02:53:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-01-28 02:53:06,774 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:53:06,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:53:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 160769689, now seen corresponding path program 58 times [2023-01-28 02:53:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:53:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241303023] [2023-01-28 02:53:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:53:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:53:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:53:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:53:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:53:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241303023] [2023-01-28 02:53:07,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241303023] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:53:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119970246] [2023-01-28 02:53:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:53:07,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:53:07,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:53:07,549 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:53:07,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 02:53:07,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:53:07,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:53:07,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 51 conjunts are in the unsatisfiable core [2023-01-28 02:53:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:53:08,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:53:08,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 86 [2023-01-28 02:53:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:53:08,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:53:10,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:53:10,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 330 treesize of output 209 [2023-01-28 02:53:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:53:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119970246] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:53:10,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:53:10,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 02:53:10,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996006498] [2023-01-28 02:53:10,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:53:10,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:53:10,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:53:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:53:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:53:10,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:53:10,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 2109 transitions, 66480 flow. Second operand has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 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 02:53:10,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:53:10,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:53:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:53:37,534 INFO L130 PetriNetUnfolder]: 8237/16477 cut-off events. [2023-01-28 02:53:37,534 INFO L131 PetriNetUnfolder]: For 905891/905891 co-relation queries the response was YES. [2023-01-28 02:53:37,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203616 conditions, 16477 events. 8237/16477 cut-off events. For 905891/905891 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 155549 event pairs, 378 based on Foata normal form. 9/16486 useless extension candidates. Maximal degree in co-relation 203382. Up to 4330 conditions per place. [2023-01-28 02:53:37,783 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 2130 selfloop transitions, 1224 changer transitions 34/3388 dead transitions. [2023-01-28 02:53:37,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 3388 transitions, 112413 flow [2023-01-28 02:53:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-28 02:53:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-28 02:53:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 9040 transitions. [2023-01-28 02:53:37,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29246198641216437 [2023-01-28 02:53:37,789 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 9040 transitions. [2023-01-28 02:53:37,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 9040 transitions. [2023-01-28 02:53:37,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:53:37,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 9040 transitions. [2023-01-28 02:53:37,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 164.36363636363637) internal successors, (9040), 55 states have internal predecessors, (9040), 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 02:53:37,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 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 02:53:37,807 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 562.0) internal successors, (31472), 56 states have internal predecessors, (31472), 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 02:53:37,807 INFO L175 Difference]: Start difference. First operand has 739 places, 2109 transitions, 66480 flow. Second operand 55 states and 9040 transitions. [2023-01-28 02:53:37,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 3388 transitions, 112413 flow [2023-01-28 02:53:51,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 3388 transitions, 110001 flow, removed 468 selfloop flow, removed 13 redundant places. [2023-01-28 02:53:51,567 INFO L231 Difference]: Finished difference. Result has 801 places, 2537 transitions, 82070 flow [2023-01-28 02:53:51,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=64924, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=82070, PETRI_PLACES=801, PETRI_TRANSITIONS=2537} [2023-01-28 02:53:51,569 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 780 predicate places. [2023-01-28 02:53:51,569 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2537 transitions, 82070 flow [2023-01-28 02:53:51,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.65625) internal successors, (5173), 32 states have internal predecessors, (5173), 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 02:53:51,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:53:51,570 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:53:51,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-01-28 02:53:51,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:53:51,778 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:53:51,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:53:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1426630437, now seen corresponding path program 59 times [2023-01-28 02:53:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:53:51,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839609057] [2023-01-28 02:53:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:53:51,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:53:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:53:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:53:52,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:53:52,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839609057] [2023-01-28 02:53:52,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839609057] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:53:52,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719241414] [2023-01-28 02:53:52,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:53:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:53:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:53:52,381 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:53:52,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 02:53:52,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:53:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:53:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 02:53:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:53:52,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 113 [2023-01-28 02:53:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:53:53,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:53:54,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:53:54,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 197 [2023-01-28 02:53:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:53:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719241414] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:53:54,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:53:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-01-28 02:53:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281946224] [2023-01-28 02:53:54,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:53:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:53:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:53:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:53:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:53:54,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:53:54,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2537 transitions, 82070 flow. Second operand has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 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 02:53:54,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:53:54,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:53:54,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:54:12,355 INFO L130 PetriNetUnfolder]: 8856/17886 cut-off events. [2023-01-28 02:54:12,355 INFO L131 PetriNetUnfolder]: For 1024379/1024379 co-relation queries the response was YES. [2023-01-28 02:54:12,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230688 conditions, 17886 events. 8856/17886 cut-off events. For 1024379/1024379 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 172513 event pairs, 2298 based on Foata normal form. 25/17911 useless extension candidates. Maximal degree in co-relation 230432. Up to 9799 conditions per place. [2023-01-28 02:54:12,638 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 2169 selfloop transitions, 640 changer transitions 32/2841 dead transitions. [2023-01-28 02:54:12,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2841 transitions, 98102 flow [2023-01-28 02:54:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 02:54:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 02:54:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5082 transitions. [2023-01-28 02:54:12,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32295373665480426 [2023-01-28 02:54:12,641 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5082 transitions. [2023-01-28 02:54:12,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5082 transitions. [2023-01-28 02:54:12,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:54:12,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5082 transitions. [2023-01-28 02:54:12,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 181.5) internal successors, (5082), 28 states have internal predecessors, (5082), 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 02:54:12,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 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 02:54:12,650 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 562.0) internal successors, (16298), 29 states have internal predecessors, (16298), 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 02:54:12,650 INFO L175 Difference]: Start difference. First operand has 801 places, 2537 transitions, 82070 flow. Second operand 28 states and 5082 transitions. [2023-01-28 02:54:12,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2841 transitions, 98102 flow [2023-01-28 02:54:31,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 2841 transitions, 95818 flow, removed 788 selfloop flow, removed 21 redundant places. [2023-01-28 02:54:31,942 INFO L231 Difference]: Finished difference. Result has 812 places, 2673 transitions, 88257 flow [2023-01-28 02:54:31,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=80169, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=88257, PETRI_PLACES=812, PETRI_TRANSITIONS=2673} [2023-01-28 02:54:31,943 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2023-01-28 02:54:31,943 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2673 transitions, 88257 flow [2023-01-28 02:54:31,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.7037037037037) internal successors, (4798), 27 states have internal predecessors, (4798), 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 02:54:31,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:54:31,944 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:54:31,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-28 02:54:32,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:54:32,144 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:54:32,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:54:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash -129823397, now seen corresponding path program 60 times [2023-01-28 02:54:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:54:32,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456244789] [2023-01-28 02:54:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:54:32,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:54:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:54:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:54:32,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:54:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456244789] [2023-01-28 02:54:32,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456244789] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:54:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299368260] [2023-01-28 02:54:32,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:54:32,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:54:32,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:54:32,937 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:54:32,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-28 02:54:33,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:54:33,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:54:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 02:54:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:54:34,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:54:34,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 116 [2023-01-28 02:54:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:54:34,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:54:36,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:54:36,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 279 treesize of output 189 [2023-01-28 02:54:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:54:36,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299368260] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:54:36,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:54:36,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-28 02:54:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981690723] [2023-01-28 02:54:36,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:54:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:54:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:54:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:54:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:54:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:54:36,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2673 transitions, 88257 flow. Second operand has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 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 02:54:36,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:54:36,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:54:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:54:58,376 INFO L130 PetriNetUnfolder]: 8881/17887 cut-off events. [2023-01-28 02:54:58,376 INFO L131 PetriNetUnfolder]: For 1065719/1065719 co-relation queries the response was YES. [2023-01-28 02:54:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231270 conditions, 17887 events. 8881/17887 cut-off events. For 1065719/1065719 co-relation queries the response was YES. Maximal size of possible extension queue 1296. Compared 172111 event pairs, 1728 based on Foata normal form. 7/17894 useless extension candidates. Maximal degree in co-relation 231010. Up to 8774 conditions per place. [2023-01-28 02:54:58,690 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1731 selfloop transitions, 1035 changer transitions 17/2783 dead transitions. [2023-01-28 02:54:58,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 2783 transitions, 96474 flow [2023-01-28 02:54:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 02:54:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 02:54:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4932 transitions. [2023-01-28 02:54:58,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29252669039145907 [2023-01-28 02:54:58,694 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4932 transitions. [2023-01-28 02:54:58,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4932 transitions. [2023-01-28 02:54:58,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:54:58,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4932 transitions. [2023-01-28 02:54:58,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 164.4) internal successors, (4932), 30 states have internal predecessors, (4932), 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 02:54:58,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 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 02:54:58,703 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 562.0) internal successors, (17422), 31 states have internal predecessors, (17422), 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 02:54:58,704 INFO L175 Difference]: Start difference. First operand has 812 places, 2673 transitions, 88257 flow. Second operand 30 states and 4932 transitions. [2023-01-28 02:54:58,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 2783 transitions, 96474 flow [2023-01-28 02:55:19,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 2783 transitions, 95260 flow, removed 517 selfloop flow, removed 15 redundant places. [2023-01-28 02:55:19,628 INFO L231 Difference]: Finished difference. Result has 829 places, 2713 transitions, 91046 flow [2023-01-28 02:55:19,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=87055, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=91046, PETRI_PLACES=829, PETRI_TRANSITIONS=2713} [2023-01-28 02:55:19,630 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 808 predicate places. [2023-01-28 02:55:19,631 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2713 transitions, 91046 flow [2023-01-28 02:55:19,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 161.6875) internal successors, (5174), 32 states have internal predecessors, (5174), 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 02:55:19,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:55:19,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:55:19,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-01-28 02:55:19,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-01-28 02:55:19,837 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:55:19,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:55:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1354907421, now seen corresponding path program 61 times [2023-01-28 02:55:19,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:55:19,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065164980] [2023-01-28 02:55:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:55:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:55:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:55:20,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:55:20,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065164980] [2023-01-28 02:55:20,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065164980] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:55:20,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743767648] [2023-01-28 02:55:20,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:55:20,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:55:20,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:55:20,441 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:55:20,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-28 02:55:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:55:20,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 02:55:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:55:21,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:55:21,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 118 [2023-01-28 02:55:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:55:21,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:55:23,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:55:23,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 353 treesize of output 213 [2023-01-28 02:55:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:55:24,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743767648] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:55:24,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:55:24,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-01-28 02:55:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715577589] [2023-01-28 02:55:24,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:55:24,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 02:55:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:55:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 02:55:24,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-01-28 02:55:24,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:55:24,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2713 transitions, 91046 flow. Second operand has 29 states, 29 states have (on average 177.89655172413794) internal successors, (5159), 29 states have internal predecessors, (5159), 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 02:55:24,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:55:24,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:55:24,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:55:45,073 INFO L130 PetriNetUnfolder]: 9027/18186 cut-off events. [2023-01-28 02:55:45,073 INFO L131 PetriNetUnfolder]: For 1144331/1144331 co-relation queries the response was YES. [2023-01-28 02:55:45,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238724 conditions, 18186 events. 9027/18186 cut-off events. For 1144331/1144331 co-relation queries the response was YES. Maximal size of possible extension queue 1318. Compared 175438 event pairs, 1686 based on Foata normal form. 34/18220 useless extension candidates. Maximal degree in co-relation 238458. Up to 7733 conditions per place. [2023-01-28 02:55:45,389 INFO L137 encePairwiseOnDemand]: 554/562 looper letters, 1818 selfloop transitions, 1044 changer transitions 23/2885 dead transitions. [2023-01-28 02:55:45,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 2885 transitions, 102098 flow [2023-01-28 02:55:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 02:55:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 02:55:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4895 transitions. [2023-01-28 02:55:45,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225912745485699 [2023-01-28 02:55:45,392 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4895 transitions. [2023-01-28 02:55:45,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4895 transitions. [2023-01-28 02:55:45,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:55:45,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4895 transitions. [2023-01-28 02:55:45,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 181.2962962962963) internal successors, (4895), 27 states have internal predecessors, (4895), 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 02:55:45,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 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 02:55:45,402 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 562.0) internal successors, (15736), 28 states have internal predecessors, (15736), 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 02:55:45,402 INFO L175 Difference]: Start difference. First operand has 829 places, 2713 transitions, 91046 flow. Second operand 27 states and 4895 transitions. [2023-01-28 02:55:45,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 2885 transitions, 102098 flow [2023-01-28 02:56:05,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 2885 transitions, 100800 flow, removed 417 selfloop flow, removed 17 redundant places. [2023-01-28 02:56:06,012 INFO L231 Difference]: Finished difference. Result has 843 places, 2763 transitions, 94386 flow [2023-01-28 02:56:06,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=89776, PETRI_DIFFERENCE_MINUEND_PLACES=809, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=94386, PETRI_PLACES=843, PETRI_TRANSITIONS=2763} [2023-01-28 02:56:06,014 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 822 predicate places. [2023-01-28 02:56:06,014 INFO L495 AbstractCegarLoop]: Abstraction has has 843 places, 2763 transitions, 94386 flow [2023-01-28 02:56:06,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 177.89655172413794) internal successors, (5159), 29 states have internal predecessors, (5159), 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 02:56:06,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:56:06,015 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:56:06,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-28 02:56:06,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-01-28 02:56:06,220 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:56:06,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:56:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1595873131, now seen corresponding path program 62 times [2023-01-28 02:56:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:56:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517022402] [2023-01-28 02:56:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:56:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:56:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:56:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:56:06,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:56:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517022402] [2023-01-28 02:56:06,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517022402] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:56:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048410830] [2023-01-28 02:56:06,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:56:06,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:56:06,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:56:06,939 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:56:06,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-28 02:56:07,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:56:07,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:56:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-28 02:56:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:56:08,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:56:08,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 121 [2023-01-28 02:56:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:56:08,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:56:10,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:56:10,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 317 treesize of output 197 [2023-01-28 02:56:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:56:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048410830] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:56:10,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:56:10,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-01-28 02:56:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935732120] [2023-01-28 02:56:10,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:56:10,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 02:56:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:56:10,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 02:56:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-01-28 02:56:10,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:56:10,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 2763 transitions, 94386 flow. Second operand has 26 states, 26 states have (on average 177.76923076923077) internal successors, (4622), 26 states have internal predecessors, (4622), 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 02:56:10,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:56:10,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:56:10,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:56:31,568 INFO L130 PetriNetUnfolder]: 9162/18378 cut-off events. [2023-01-28 02:56:31,568 INFO L131 PetriNetUnfolder]: For 1222955/1222955 co-relation queries the response was YES. [2023-01-28 02:56:31,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247502 conditions, 18378 events. 9162/18378 cut-off events. For 1222955/1222955 co-relation queries the response was YES. Maximal size of possible extension queue 1324. Compared 176854 event pairs, 1726 based on Foata normal form. 13/18391 useless extension candidates. Maximal degree in co-relation 247233. Up to 7917 conditions per place. [2023-01-28 02:56:31,866 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1846 selfloop transitions, 1085 changer transitions 16/2947 dead transitions. [2023-01-28 02:56:31,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 2947 transitions, 106009 flow [2023-01-28 02:56:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 02:56:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 02:56:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5604 transitions. [2023-01-28 02:56:31,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32166226610033294 [2023-01-28 02:56:31,870 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5604 transitions. [2023-01-28 02:56:31,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5604 transitions. [2023-01-28 02:56:31,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:56:31,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5604 transitions. [2023-01-28 02:56:31,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 180.7741935483871) internal successors, (5604), 31 states have internal predecessors, (5604), 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 02:56:31,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:56:31,880 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 562.0) internal successors, (17984), 32 states have internal predecessors, (17984), 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 02:56:31,880 INFO L175 Difference]: Start difference. First operand has 843 places, 2763 transitions, 94386 flow. Second operand 31 states and 5604 transitions. [2023-01-28 02:56:31,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 2947 transitions, 106009 flow [2023-01-28 02:56:53,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 2947 transitions, 104929 flow, removed 301 selfloop flow, removed 14 redundant places. [2023-01-28 02:56:53,445 INFO L231 Difference]: Finished difference. Result has 869 places, 2842 transitions, 99590 flow [2023-01-28 02:56:53,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=93322, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=99590, PETRI_PLACES=869, PETRI_TRANSITIONS=2842} [2023-01-28 02:56:53,447 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 848 predicate places. [2023-01-28 02:56:53,447 INFO L495 AbstractCegarLoop]: Abstraction has has 869 places, 2842 transitions, 99590 flow [2023-01-28 02:56:53,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 177.76923076923077) internal successors, (4622), 26 states have internal predecessors, (4622), 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 02:56:53,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:56:53,448 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:56:53,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-01-28 02:56:53,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:56:53,648 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:56:53,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:56:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1948910203, now seen corresponding path program 63 times [2023-01-28 02:56:53,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:56:53,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54689427] [2023-01-28 02:56:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:56:53,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:56:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:56:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:56:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:56:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54689427] [2023-01-28 02:56:54,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54689427] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:56:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902784245] [2023-01-28 02:56:54,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:56:54,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:56:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:56:54,636 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:56:54,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-28 02:56:54,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 02:56:54,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:56:54,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-28 02:56:54,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:56:55,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:56:55,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 113 [2023-01-28 02:56:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 02:56:55,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:56:58,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:56:58,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 460 treesize of output 257 [2023-01-28 02:56:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:56:58,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902784245] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:56:58,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:56:58,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 33 [2023-01-28 02:56:58,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554809325] [2023-01-28 02:56:58,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:56:58,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 02:56:58,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:56:58,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 02:56:58,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 02:56:58,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 562 [2023-01-28 02:56:58,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 869 places, 2842 transitions, 99590 flow. Second operand has 34 states, 34 states have (on average 161.64705882352942) internal successors, (5496), 34 states have internal predecessors, (5496), 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 02:56:58,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:56:58,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 562 [2023-01-28 02:56:58,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:57:26,874 INFO L130 PetriNetUnfolder]: 9405/18864 cut-off events. [2023-01-28 02:57:26,874 INFO L131 PetriNetUnfolder]: For 1348234/1348234 co-relation queries the response was YES. [2023-01-28 02:57:27,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259659 conditions, 18864 events. 9405/18864 cut-off events. For 1348234/1348234 co-relation queries the response was YES. Maximal size of possible extension queue 1371. Compared 182607 event pairs, 1920 based on Foata normal form. 18/18882 useless extension candidates. Maximal degree in co-relation 259379. Up to 9586 conditions per place. [2023-01-28 02:57:27,195 INFO L137 encePairwiseOnDemand]: 551/562 looper letters, 1937 selfloop transitions, 1088 changer transitions 29/3054 dead transitions. [2023-01-28 02:57:27,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 907 places, 3054 transitions, 111606 flow [2023-01-28 02:57:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 02:57:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 02:57:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 6757 transitions. [2023-01-28 02:57:27,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29324711396580155 [2023-01-28 02:57:27,200 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 6757 transitions. [2023-01-28 02:57:27,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 6757 transitions. [2023-01-28 02:57:27,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:57:27,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 6757 transitions. [2023-01-28 02:57:27,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 164.8048780487805) internal successors, (6757), 41 states have internal predecessors, (6757), 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 02:57:27,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 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 02:57:27,212 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 562.0) internal successors, (23604), 42 states have internal predecessors, (23604), 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 02:57:27,213 INFO L175 Difference]: Start difference. First operand has 869 places, 2842 transitions, 99590 flow. Second operand 41 states and 6757 transitions. [2023-01-28 02:57:27,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 907 places, 3054 transitions, 111606 flow [2023-01-28 02:57:52,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 3054 transitions, 110147 flow, removed 649 selfloop flow, removed 14 redundant places. [2023-01-28 02:57:52,121 INFO L231 Difference]: Finished difference. Result has 905 places, 2944 transitions, 105185 flow [2023-01-28 02:57:52,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=98176, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=105185, PETRI_PLACES=905, PETRI_TRANSITIONS=2944} [2023-01-28 02:57:52,123 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 884 predicate places. [2023-01-28 02:57:52,123 INFO L495 AbstractCegarLoop]: Abstraction has has 905 places, 2944 transitions, 105185 flow [2023-01-28 02:57:52,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 161.64705882352942) internal successors, (5496), 34 states have internal predecessors, (5496), 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 02:57:52,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:57:52,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:57:52,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-01-28 02:57:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-01-28 02:57:52,330 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:57:52,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:57:52,330 INFO L85 PathProgramCache]: Analyzing trace with hash -515891015, now seen corresponding path program 64 times [2023-01-28 02:57:52,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:57:52,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794817782] [2023-01-28 02:57:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:57:52,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:57:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:57:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:57:52,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:57:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794817782] [2023-01-28 02:57:52,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794817782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:57:52,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671758067] [2023-01-28 02:57:52,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:57:52,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:57:52,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:57:52,958 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:57:52,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-28 02:57:53,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:57:53,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:57:53,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 02:57:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:57:53,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:57:53,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 100 [2023-01-28 02:57:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:57:53,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:57:55,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:57:55,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 285 treesize of output 167 [2023-01-28 02:57:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:57:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671758067] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:57:55,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:57:55,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 02:57:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459200774] [2023-01-28 02:57:55,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:57:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 02:57:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:57:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 02:57:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-01-28 02:57:55,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 562 [2023-01-28 02:57:55,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 905 places, 2944 transitions, 105185 flow. Second operand has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 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 02:57:55,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:57:55,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 562 [2023-01-28 02:57:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:58:17,930 INFO L130 PetriNetUnfolder]: 9544/19123 cut-off events. [2023-01-28 02:58:17,930 INFO L131 PetriNetUnfolder]: For 1431655/1431655 co-relation queries the response was YES. [2023-01-28 02:58:18,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268077 conditions, 19123 events. 9544/19123 cut-off events. For 1431655/1431655 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 185364 event pairs, 1952 based on Foata normal form. 14/19137 useless extension candidates. Maximal degree in co-relation 267784. Up to 9689 conditions per place. [2023-01-28 02:58:18,358 INFO L137 encePairwiseOnDemand]: 553/562 looper letters, 1977 selfloop transitions, 1112 changer transitions 25/3114 dead transitions. [2023-01-28 02:58:18,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 3114 transitions, 116287 flow [2023-01-28 02:58:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 02:58:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 02:58:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6692 transitions. [2023-01-28 02:58:18,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321823602962393 [2023-01-28 02:58:18,362 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6692 transitions. [2023-01-28 02:58:18,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6692 transitions. [2023-01-28 02:58:18,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:58:18,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6692 transitions. [2023-01-28 02:58:18,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 180.86486486486487) internal successors, (6692), 37 states have internal predecessors, (6692), 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 02:58:18,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 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 02:58:18,374 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 562.0) internal successors, (21356), 38 states have internal predecessors, (21356), 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 02:58:18,374 INFO L175 Difference]: Start difference. First operand has 905 places, 2944 transitions, 105185 flow. Second operand 37 states and 6692 transitions. [2023-01-28 02:58:18,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 3114 transitions, 116287 flow [2023-01-28 02:58:44,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 921 places, 3114 transitions, 114743 flow, removed 755 selfloop flow, removed 16 redundant places. [2023-01-28 02:58:44,195 INFO L231 Difference]: Finished difference. Result has 932 places, 3019 transitions, 109803 flow [2023-01-28 02:58:44,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=562, PETRI_DIFFERENCE_MINUEND_FLOW=103661, PETRI_DIFFERENCE_MINUEND_PLACES=885, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=109803, PETRI_PLACES=932, PETRI_TRANSITIONS=3019} [2023-01-28 02:58:44,198 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 911 predicate places. [2023-01-28 02:58:44,198 INFO L495 AbstractCegarLoop]: Abstraction has has 932 places, 3019 transitions, 109803 flow [2023-01-28 02:58:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 177.8148148148148) internal successors, (4801), 27 states have internal predecessors, (4801), 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 02:58:44,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:58:44,198 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:58:44,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-28 02:58:44,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:58:44,404 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 02:58:44,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:58:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1523920965, now seen corresponding path program 65 times [2023-01-28 02:58:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:58:44,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96520852] [2023-01-28 02:58:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:58:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:58:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:58:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:58:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:58:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96520852] [2023-01-28 02:58:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96520852] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:58:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479015202] [2023-01-28 02:58:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:58:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:58:45,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:58:45,062 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 02:58:45,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-28 02:58:45,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:58:45,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:58:45,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 02:58:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:58:45,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 253 treesize of output 139 [2023-01-28 02:58:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:58:45,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:58:47,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:58:47,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 282 treesize of output 183 Received shutdown request... [2023-01-28 02:58:47,502 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 02:58:47,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-01-28 02:58:47,545 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 02:58:47,545 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 02:58:47,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:58:47,707 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while QuantifierPusher was running 1 iterations on subformula. [2023-01-28 02:58:47,709 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 02:58:47,709 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 02:58:47,709 INFO L445 BasicCegarLoop]: Path program histogram: [65, 6, 6, 4, 1] [2023-01-28 02:58:47,711 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 02:58:47,711 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 02:58:47,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 02:58:47 BasicIcfg [2023-01-28 02:58:47,712 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 02:58:47,712 INFO L158 Benchmark]: Toolchain (without parser) took 795575.33ms. Allocated memory was 329.3MB in the beginning and 6.7GB in the end (delta: 6.3GB). Free memory was 298.5MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-01-28 02:58:47,713 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 02:58:47,713 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.48ms. Allocated memory is still 329.3MB. Free memory was 298.1MB in the beginning and 285.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 02:58:47,713 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.16ms. Allocated memory is still 329.3MB. Free memory was 285.9MB in the beginning and 283.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 02:58:47,713 INFO L158 Benchmark]: Boogie Preprocessor took 20.01ms. Allocated memory is still 329.3MB. Free memory was 283.8MB in the beginning and 282.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 02:58:47,713 INFO L158 Benchmark]: RCFGBuilder took 502.00ms. Allocated memory is still 329.3MB. Free memory was 281.7MB in the beginning and 260.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-28 02:58:47,713 INFO L158 Benchmark]: TraceAbstraction took 794852.97ms. Allocated memory was 329.3MB in the beginning and 6.7GB in the end (delta: 6.3GB). Free memory was 260.0MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-01-28 02:58:47,714 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 is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 168.48ms. Allocated memory is still 329.3MB. Free memory was 298.1MB in the beginning and 285.9MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.16ms. Allocated memory is still 329.3MB. Free memory was 285.9MB in the beginning and 283.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.01ms. Allocated memory is still 329.3MB. Free memory was 283.8MB in the beginning and 282.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 502.00ms. Allocated memory is still 329.3MB. Free memory was 281.7MB in the beginning and 260.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 794852.97ms. Allocated memory was 329.3MB in the beginning and 6.7GB in the end (delta: 6.3GB). Free memory was 260.0MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.1s, 238 PlacesBefore, 21 PlacesAfterwards, 250 TransitionsBefore, 17 TransitionsAfterwards, 9828 CoEnabledTransitionPairs, 8 FixpointIterations, 106 TrivialSequentialCompositions, 118 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 48 ConcurrentYvCompositions, 16 ChoiceCompositions, 302 TotalNumberOfCompositions, 8979 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8815, independent: 8803, independent conditional: 0, independent unconditional: 8803, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5971, independent: 5966, independent conditional: 0, independent unconditional: 5966, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8815, independent: 2837, independent conditional: 0, independent unconditional: 2837, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 5971, unknown conditional: 0, unknown unconditional: 5971] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while QuantifierPusher was running 1 iterations on subformula. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while QuantifierPusher was running 1 iterations on subformula. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while QuantifierPusher was running 1 iterations on subformula. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 358 locations, 3 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: 794.8s, OverallIterations: 82, TraceHistogramMax: 4, PathProgramHistogramMax: 65, EmptinessCheckTime: 0.0s, AutomataDifference: 608.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11356 SdHoareTripleChecker+Valid, 29.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11356 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 25.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 98 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2041 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50224 IncrementalHoareTripleChecker+Invalid, 52363 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2041 mSolverCounterUnsat, 0 mSDtfsCounter, 50224 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5224 GetRequests, 2351 SyntacticMatches, 18 SemanticMatches, 2855 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 31435 ImplicationChecksByTransitivity, 171.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109803occurred in iteration=81, InterpolantAutomatonStates: 1570, 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: 0.9s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 151.2s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2913 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4035 ConstructedInterpolants, 6 QuantifiedInterpolants, 94944 SizeOfPredicates, 2012 NumberOfNonLiveVariables, 15107 ConjunctsInSsa, 2768 ConjunctsInUnsatCore, 213 InterpolantComputations, 16 PerfectInterpolantSequences, 1298/2140 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