/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-lit/qw2004-2b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:04:33,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:04:33,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:04:33,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 07:04:33,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:04:33,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:04:33,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:04:33,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:04:33,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:04:33,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:04:33,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:04:33,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:04:33,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:04:33,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:04:33,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:04:33,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:04:33,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 07:04:33,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:04:33,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:04:33,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:04:33,918 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 07:04:33,938 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:04:33,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:04:33,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:04:33,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:04:33,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:04:33,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:04:33,940 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:04:33,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:04:33,940 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:04:33,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:04:33,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:04:33,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:04:33,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:04:33,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:04:33,943 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:04:34,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:04:34,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:04:34,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:04:34,128 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:04:34,128 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:04:34,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/qw2004-2b.i [2023-01-28 07:04:35,073 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:04:35,312 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:04:35,312 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2b.i [2023-01-28 07:04:35,321 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640073cd1/08bf6718710748de870a3ccbf5d52767/FLAGffaac45e9 [2023-01-28 07:04:35,332 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640073cd1/08bf6718710748de870a3ccbf5d52767 [2023-01-28 07:04:35,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:04:35,335 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:04:35,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:04:35,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:04:35,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:04:35,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7b8efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35, skipping insertion in model container [2023-01-28 07:04:35,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:04:35,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:04:35,588 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2b.i[30003,30016] [2023-01-28 07:04:35,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:04:35,613 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:04:35,655 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/qw2004-2b.i[30003,30016] [2023-01-28 07:04:35,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:04:35,680 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:04:35,680 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:04:35,685 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:04:35,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35 WrapperNode [2023-01-28 07:04:35,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:04:35,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:04:35,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:04:35,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:04:35,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,722 INFO L138 Inliner]: procedures = 175, calls = 36, calls flagged for inlining = 9, calls inlined = 10, statements flattened = 117 [2023-01-28 07:04:35,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:04:35,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:04:35,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:04:35,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:04:35,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:04:35,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:04:35,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:04:35,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:04:35,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (1/1) ... [2023-01-28 07:04:35,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:04:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:04:35,784 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 07:04:35,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:04:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2023-01-28 07:04:35,810 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2023-01-28 07:04:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:04:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 07:04:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:04:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:04:35,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:04:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:04:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 07:04:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:04:35,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:04:35,812 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 07:04:35,945 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:04:35,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:04:36,119 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:04:36,144 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:04:36,145 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-01-28 07:04:36,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:04:36 BoogieIcfgContainer [2023-01-28 07:04:36,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:04:36,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:04:36,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:04:36,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:04:36,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:04:35" (1/3) ... [2023-01-28 07:04:36,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a68ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:04:36, skipping insertion in model container [2023-01-28 07:04:36,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:04:35" (2/3) ... [2023-01-28 07:04:36,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a68ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:04:36, skipping insertion in model container [2023-01-28 07:04:36,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:04:36" (3/3) ... [2023-01-28 07:04:36,152 INFO L112 eAbstractionObserver]: Analyzing ICFG qw2004-2b.i [2023-01-28 07:04:36,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:04:36,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:04:36,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:04:36,227 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:04:36,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 103 transitions, 211 flow [2023-01-28 07:04:36,305 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2023-01-28 07:04:36,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:04:36,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 102 events. 6/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-01-28 07:04:36,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 103 transitions, 211 flow [2023-01-28 07:04:36,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 102 transitions, 207 flow [2023-01-28 07:04:36,319 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:04:36,330 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 207 flow [2023-01-28 07:04:36,333 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 102 transitions, 207 flow [2023-01-28 07:04:36,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 207 flow [2023-01-28 07:04:36,366 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2023-01-28 07:04:36,366 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:04:36,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 102 events. 6/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-01-28 07:04:36,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 2862 [2023-01-28 07:04:38,225 INFO L134 LiptonReduction]: Checked pairs total: 3457 [2023-01-28 07:04:38,226 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-01-28 07:04:38,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:04:38,239 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;@7c3b9b3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:04:38,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 07:04:38,241 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-01-28 07:04:38,241 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:04:38,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:04:38,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:04:38,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:04:38,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:04:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 12669601, now seen corresponding path program 1 times [2023-01-28 07:04:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:04:38,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266990045] [2023-01-28 07:04:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:04:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:04:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:04:38,441 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 07:04:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:04:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266990045] [2023-01-28 07:04:38,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266990045] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:04:38,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:04:38,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:04:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789435090] [2023-01-28 07:04:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:04:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:04:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:04:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:04:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:04:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 213 [2023-01-28 07:04:38,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 18 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:04:38,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 213 [2023-01-28 07:04:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:04:38,532 INFO L130 PetriNetUnfolder]: 89/179 cut-off events. [2023-01-28 07:04:38,533 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:04:38,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 179 events. 89/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 641 event pairs, 24 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 348. Up to 89 conditions per place. [2023-01-28 07:04:38,534 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 17 selfloop transitions, 3 changer transitions 10/31 dead transitions. [2023-01-28 07:04:38,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 31 transitions, 125 flow [2023-01-28 07:04:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:04:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:04:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-01-28 07:04:38,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48513302034428796 [2023-01-28 07:04:38,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-01-28 07:04:38,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-01-28 07:04:38,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:04:38,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-01-28 07:04:38,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,558 INFO L175 Difference]: Start difference. First operand has 19 places, 18 transitions, 39 flow. Second operand 3 states and 310 transitions. [2023-01-28 07:04:38,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 31 transitions, 125 flow [2023-01-28 07:04:38,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:04:38,560 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 46 flow [2023-01-28 07:04:38,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-01-28 07:04:38,564 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-01-28 07:04:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 46 flow [2023-01-28 07:04:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:04:38,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 07:04:38,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:04:38,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:04:38,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:04:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 392715310, now seen corresponding path program 1 times [2023-01-28 07:04:38,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:04:38,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550404078] [2023-01-28 07:04:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:04:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:04:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:04:38,612 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 07:04:38,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:04:38,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550404078] [2023-01-28 07:04:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550404078] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:04:38,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:04:38,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:04:38,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908941264] [2023-01-28 07:04:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:04:38,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:04:38,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:04:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:04:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:04:38,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 213 [2023-01-28 07:04:38,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 14 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:04:38,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 213 [2023-01-28 07:04:38,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:04:38,637 INFO L130 PetriNetUnfolder]: 34/81 cut-off events. [2023-01-28 07:04:38,638 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-01-28 07:04:38,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 81 events. 34/81 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 288 event pairs, 22 based on Foata normal form. 5/77 useless extension candidates. Maximal degree in co-relation 180. Up to 70 conditions per place. [2023-01-28 07:04:38,638 INFO L137 encePairwiseOnDemand]: 211/213 looper letters, 12 selfloop transitions, 0 changer transitions 6/19 dead transitions. [2023-01-28 07:04:38,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 92 flow [2023-01-28 07:04:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:04:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:04:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-01-28 07:04:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460093896713615 [2023-01-28 07:04:38,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-01-28 07:04:38,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-01-28 07:04:38,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:04:38,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-01-28 07:04:38,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,643 INFO L175 Difference]: Start difference. First operand has 22 places, 14 transitions, 46 flow. Second operand 3 states and 294 transitions. [2023-01-28 07:04:38,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 92 flow [2023-01-28 07:04:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:04:38,644 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 38 flow [2023-01-28 07:04:38,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-01-28 07:04:38,645 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 0 predicate places. [2023-01-28 07:04:38,645 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 38 flow [2023-01-28 07:04:38,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:04:38,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-28 07:04:38,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 07:04:38,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:04:38,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:04:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash -709760952, now seen corresponding path program 1 times [2023-01-28 07:04:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:04:38,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928403689] [2023-01-28 07:04:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:04:38,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:04:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:04:38,724 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 07:04:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:04:38,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928403689] [2023-01-28 07:04:38,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928403689] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:04:38,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:04:38,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 07:04:38,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873615022] [2023-01-28 07:04:38,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:04:38,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:04:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:04:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:04:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:04:38,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 213 [2023-01-28 07:04:38,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:04:38,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 213 [2023-01-28 07:04:38,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:04:38,747 INFO L130 PetriNetUnfolder]: 18/52 cut-off events. [2023-01-28 07:04:38,747 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 07:04:38,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 52 events. 18/52 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 169 event pairs, 10 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 115. Up to 39 conditions per place. [2023-01-28 07:04:38,748 INFO L137 encePairwiseOnDemand]: 210/213 looper letters, 12 selfloop transitions, 2 changer transitions 0/15 dead transitions. [2023-01-28 07:04:38,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 15 transitions, 72 flow [2023-01-28 07:04:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:04:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:04:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-01-28 07:04:38,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458528951486698 [2023-01-28 07:04:38,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-01-28 07:04:38,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-01-28 07:04:38,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:04:38,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-01-28 07:04:38,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,752 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,752 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 38 flow. Second operand 3 states and 293 transitions. [2023-01-28 07:04:38,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 15 transitions, 72 flow [2023-01-28 07:04:38,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 70 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:04:38,752 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 44 flow [2023-01-28 07:04:38,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-01-28 07:04:38,753 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-01-28 07:04:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 44 flow [2023-01-28 07:04:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:04:38,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:04:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:04:38,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:04:38,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:04:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1571094979, now seen corresponding path program 1 times [2023-01-28 07:04:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:04:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963605533] [2023-01-28 07:04:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:04:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:04:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:04:38,846 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 07:04:38,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:04:38,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963605533] [2023-01-28 07:04:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963605533] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:04:38,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:04:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 07:04:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391874935] [2023-01-28 07:04:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:04:38,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 07:04:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:04:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 07:04:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 07:04:38,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 213 [2023-01-28 07:04:38,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:04:38,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 213 [2023-01-28 07:04:38,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:04:38,874 INFO L130 PetriNetUnfolder]: 16/55 cut-off events. [2023-01-28 07:04:38,874 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:04:38,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 55 events. 16/55 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 193 event pairs, 4 based on Foata normal form. 5/54 useless extension candidates. Maximal degree in co-relation 133. Up to 27 conditions per place. [2023-01-28 07:04:38,875 INFO L137 encePairwiseOnDemand]: 209/213 looper letters, 11 selfloop transitions, 2 changer transitions 3/17 dead transitions. [2023-01-28 07:04:38,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 88 flow [2023-01-28 07:04:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:04:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:04:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2023-01-28 07:04:38,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413145539906103 [2023-01-28 07:04:38,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2023-01-28 07:04:38,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2023-01-28 07:04:38,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:04:38,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2023-01-28 07:04:38,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,879 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 44 flow. Second operand 4 states and 376 transitions. [2023-01-28 07:04:38,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 88 flow [2023-01-28 07:04:38,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 07:04:38,880 INFO L231 Difference]: Finished difference. Result has 22 places, 12 transitions, 44 flow [2023-01-28 07:04:38,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=12} [2023-01-28 07:04:38,880 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2023-01-28 07:04:38,880 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 12 transitions, 44 flow [2023-01-28 07:04:38,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:04:38,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:04:38,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:04:38,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:04:38,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:04:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1459213691, now seen corresponding path program 1 times [2023-01-28 07:04:38,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:04:38,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839494436] [2023-01-28 07:04:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:04:38,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:04:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:04:38,940 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 07:04:38,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:04:38,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839494436] [2023-01-28 07:04:38,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839494436] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:04:38,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:04:38,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 07:04:38,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597027255] [2023-01-28 07:04:38,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:04:38,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:04:38,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:04:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:04:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:04:38,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 213 [2023-01-28 07:04:38,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 12 transitions, 44 flow. Second operand has 6 states, 6 states have (on average 88.83333333333333) internal successors, (533), 6 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:38,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:04:38,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 213 [2023-01-28 07:04:38,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:04:39,010 INFO L130 PetriNetUnfolder]: 24/86 cut-off events. [2023-01-28 07:04:39,011 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:04:39,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 86 events. 24/86 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 334 event pairs, 12 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 223. Up to 47 conditions per place. [2023-01-28 07:04:39,013 INFO L137 encePairwiseOnDemand]: 208/213 looper letters, 19 selfloop transitions, 5 changer transitions 3/27 dead transitions. [2023-01-28 07:04:39,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 146 flow [2023-01-28 07:04:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:04:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:04:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 636 transitions. [2023-01-28 07:04:39,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42655935613682094 [2023-01-28 07:04:39,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 636 transitions. [2023-01-28 07:04:39,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 636 transitions. [2023-01-28 07:04:39,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:04:39,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 636 transitions. [2023-01-28 07:04:39,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:39,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:39,020 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 213.0) internal successors, (1704), 8 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:39,020 INFO L175 Difference]: Start difference. First operand has 22 places, 12 transitions, 44 flow. Second operand 7 states and 636 transitions. [2023-01-28 07:04:39,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 146 flow [2023-01-28 07:04:39,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 132 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 07:04:39,022 INFO L231 Difference]: Finished difference. Result has 28 places, 15 transitions, 69 flow [2023-01-28 07:04:39,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=15} [2023-01-28 07:04:39,024 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 9 predicate places. [2023-01-28 07:04:39,025 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 15 transitions, 69 flow [2023-01-28 07:04:39,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.83333333333333) internal successors, (533), 6 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:04:39,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:04:39,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:04:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 07:04:39,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:04:39,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:04:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash 16365159, now seen corresponding path program 2 times [2023-01-28 07:04:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:04:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880581906] [2023-01-28 07:04:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:04:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:04:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:04:39,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:04:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:04:39,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:04:39,076 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:04:39,077 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 07:04:39,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-01-28 07:04:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:04:39,079 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-01-28 07:04:39,083 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 07:04:39,083 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 07:04:39,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 07:04:39 BasicIcfg [2023-01-28 07:04:39,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 07:04:39,106 INFO L158 Benchmark]: Toolchain (without parser) took 3771.73ms. Allocated memory is still 536.9MB. Free memory was 490.6MB in the beginning and 377.1MB in the end (delta: 113.5MB). Peak memory consumption was 116.4MB. Max. memory is 16.0GB. [2023-01-28 07:04:39,107 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 390.1MB. Free memory is still 335.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 07:04:39,107 INFO L158 Benchmark]: CACSL2BoogieTranslator took 350.12ms. Allocated memory is still 536.9MB. Free memory was 490.6MB in the beginning and 470.6MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-28 07:04:39,107 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.64ms. Allocated memory is still 536.9MB. Free memory was 470.6MB in the beginning and 468.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 07:04:39,107 INFO L158 Benchmark]: Boogie Preprocessor took 23.96ms. Allocated memory is still 536.9MB. Free memory was 468.5MB in the beginning and 467.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 07:04:39,107 INFO L158 Benchmark]: RCFGBuilder took 398.97ms. Allocated memory is still 536.9MB. Free memory was 466.9MB in the beginning and 451.8MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-28 07:04:39,108 INFO L158 Benchmark]: TraceAbstraction took 2958.19ms. Allocated memory is still 536.9MB. Free memory was 450.9MB in the beginning and 377.1MB in the end (delta: 73.8MB). Peak memory consumption was 76.6MB. Max. memory is 16.0GB. [2023-01-28 07:04:39,109 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 390.1MB. Free memory is still 335.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 350.12ms. Allocated memory is still 536.9MB. Free memory was 490.6MB in the beginning and 470.6MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.64ms. Allocated memory is still 536.9MB. Free memory was 470.6MB in the beginning and 468.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.96ms. Allocated memory is still 536.9MB. Free memory was 468.5MB in the beginning and 467.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 398.97ms. Allocated memory is still 536.9MB. Free memory was 466.9MB in the beginning and 451.8MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 2958.19ms. Allocated memory is still 536.9MB. Free memory was 450.9MB in the beginning and 377.1MB in the end (delta: 73.8MB). Peak memory consumption was 76.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 100 PlacesBefore, 19 PlacesAfterwards, 102 TransitionsBefore, 18 TransitionsAfterwards, 2862 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 65 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 3 ChoiceCompositions, 110 TotalNumberOfCompositions, 3457 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2820, independent: 2736, independent conditional: 0, independent unconditional: 2736, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1759, independent: 1726, independent conditional: 0, independent unconditional: 1726, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2820, independent: 1010, independent conditional: 0, independent unconditional: 1010, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 1759, unknown conditional: 0, unknown unconditional: 1759] , Statistics on independence cache: Total cache size (in pairs): 50, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 690]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L697] 0 volatile int stoppingFlag; [L698] 0 volatile int pendingIo; [L699] 0 volatile int stoppingEvent; [L700] 0 volatile int stopped; [L756] 0 pthread_t t; [L757] 0 pendingIo = 1 [L758] 0 stoppingFlag = 0 [L759] 0 stoppingEvent = 0 [L760] 0 stopped = 0 [L761] FCALL, FORK 0 pthread_create(&t, 0, BCSP_PnpStop, 0) VAL [pendingIo=1, pthread_create(&t, 0, BCSP_PnpStop, 0)=-1, stopped=0, stoppingEvent=0, stoppingFlag=0, t={3:0}] [L762] CALL 0 BCSP_PnpAdd(0) [L734] 0 int status; [L735] CALL, EXPR 0 BCSP_IoIncrement() [L703] 0 int lsf = stoppingFlag; [L705] COND FALSE 0 !(\read(lsf)) VAL [lsf=0, pendingIo=1, stopped=0, stoppingEvent=0, stoppingFlag=0] [L745] 1 stoppingFlag = 1 [L747] CALL 1 BCSP_IoDecrement() [L725] 1 int pending; [L726] CALL, EXPR 1 dec() [L719] 1 pendingIo-- [L720] 1 int tmp = pendingIo; [L722] 1 return tmp; [L726] RET, EXPR 1 dec() [L726] 1 pending = dec() [L727] COND TRUE 1 pending == 0 [L729] 1 stoppingEvent = 1 [L747] RET 1 BCSP_IoDecrement() [L709] 0 int lp = pendingIo; VAL [lp=0, lsf=0, pendingIo=0, stopped=0, stoppingEvent=1, stoppingFlag=1] [L749] 1 int lse = stoppingEvent; [L751] CALL 1 assume_abort_if_not(lse) [L712] 0 pendingIo = lp + 1 [L715] 0 return 0; [L735] RET, EXPR 0 BCSP_IoIncrement() [L735] 0 status = BCSP_IoIncrement() [L686] COND FALSE 1 !(!cond) [L751] RET 1 assume_abort_if_not(lse) [L752] 1 stopped = 1 [L753] 1 return 0; [L736] COND TRUE 0 status == 0 [L737] 0 int local_assertion = !stopped; [L738] CALL 0 __VERIFIER_assert(local_assertion) [L689] COND TRUE 0 !(cond) [L690] 0 reach_error() VAL [\old(cond)=0, cond=0, pendingIo=1, stopped=1, stoppingEvent=1, stoppingFlag=1] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 125 locations, 2 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: 2.8s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 42 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 203 IncrementalHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 203 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=5, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 113 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-28 07:04:39,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...