/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-ext/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:31:03,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:31:03,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:31:03,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 06:31:03,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:31:03,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:31:03,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:31:03,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:31:03,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:31:03,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:31:03,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:31:03,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:31:03,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:31:03,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:31:03,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:31:03,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:31:03,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 06:31:03,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:31:03,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:31:03,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:31:03,789 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 06:31:03,814 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:31:03,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:31:03,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:31:03,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:31:03,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:31:03,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:31:03,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:31:03,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:31:03,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:31:03,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:31:03,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:31:03,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:31:03,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:31:03,817 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:31:03,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:31:03,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:31:03,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:31:04,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:31:04,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:31:04,026 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:31:04,027 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:31:04,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-01-28 06:31:05,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:31:05,272 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:31:05,272 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-01-28 06:31:05,279 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c21512d/aed529c032f748a298a21ca0485625cc/FLAG983458ee9 [2023-01-28 06:31:05,296 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02c21512d/aed529c032f748a298a21ca0485625cc [2023-01-28 06:31:05,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:31:05,299 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:31:05,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:31:05,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:31:05,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:31:05,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c492d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05, skipping insertion in model container [2023-01-28 06:31:05,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:31:05,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:31:05,494 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-ext/14_spin2003.i[30203,30216] [2023-01-28 06:31:05,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:31:05,505 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:31:05,527 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-ext/14_spin2003.i[30203,30216] [2023-01-28 06:31:05,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:31:05,558 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:31:05,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05 WrapperNode [2023-01-28 06:31:05,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:31:05,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:31:05,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:31:05,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:31:05,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,601 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2023-01-28 06:31:05,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:31:05,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:31:05,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:31:05,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:31:05,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,625 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:31:05,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:31:05,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:31:05,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:31:05,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (1/1) ... [2023-01-28 06:31:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:31:05,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:31:05,670 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 06:31:05,721 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 06:31:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 06:31:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 06:31:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:31:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:31:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:31:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:31:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:31:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:31:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:31:05,735 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 06:31:05,833 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:31:05,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:31:05,965 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:31:06,007 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:31:06,007 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-01-28 06:31:06,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:31:06 BoogieIcfgContainer [2023-01-28 06:31:06,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:31:06,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:31:06,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:31:06,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:31:06,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:31:05" (1/3) ... [2023-01-28 06:31:06,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23234ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:31:06, skipping insertion in model container [2023-01-28 06:31:06,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:31:05" (2/3) ... [2023-01-28 06:31:06,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23234ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:31:06, skipping insertion in model container [2023-01-28 06:31:06,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:31:06" (3/3) ... [2023-01-28 06:31:06,018 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-01-28 06:31:06,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:31:06,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:31:06,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:31:06,109 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:31:06,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:06,163 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-01-28 06:31:06,164 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:06,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-01-28 06:31:06,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:06,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:06,173 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:06,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:06,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:06,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:06,195 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-01-28 06:31:06,196 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-01-28 06:31:06,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 312 [2023-01-28 06:31:07,129 INFO L134 LiptonReduction]: Checked pairs total: 276 [2023-01-28 06:31:07,129 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-01-28 06:31:07,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:31:07,144 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:07,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:31:07,146 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-28 06:31:07,146 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:07,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:07,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 06:31:07,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:31:07,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 6420180, now seen corresponding path program 1 times [2023-01-28 06:31:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:07,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559072859] [2023-01-28 06:31:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:07,272 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 06:31:07,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559072859] [2023-01-28 06:31:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559072859] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:07,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:07,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:31:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385896076] [2023-01-28 06:31:07,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:07,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:31:07,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:31:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:31:07,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 76 [2023-01-28 06:31:07,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:07,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:07,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 76 [2023-01-28 06:31:07,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:07,315 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2023-01-28 06:31:07,315 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:07,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-01-28 06:31:07,316 INFO L137 encePairwiseOnDemand]: 74/76 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2023-01-28 06:31:07,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-01-28 06:31:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:31:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:31:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 69 transitions. [2023-01-28 06:31:07,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45394736842105265 [2023-01-28 06:31:07,326 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 69 transitions. [2023-01-28 06:31:07,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 69 transitions. [2023-01-28 06:31:07,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:07,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 69 transitions. [2023-01-28 06:31:07,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.5) internal successors, (69), 2 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:07,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:07,352 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:07,354 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 69 transitions. [2023-01-28 06:31:07,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-01-28 06:31:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:31:07,356 INFO L231 Difference]: Finished difference. Result has 10 places, 0 transitions, 0 flow [2023-01-28 06:31:07,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=10, PETRI_TRANSITIONS=0} [2023-01-28 06:31:07,359 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-01-28 06:31:07,360 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 0 transitions, 0 flow [2023-01-28 06:31:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:07,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 06:31:07,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 06:31:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:31:07,362 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:31:07,364 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 06:31:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:07,372 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-01-28 06:31:07,372 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:07,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-01-28 06:31:07,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:07,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:07,373 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:07,373 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:07,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:07,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 81 flow [2023-01-28 06:31:07,379 INFO L130 PetriNetUnfolder]: 3/48 cut-off events. [2023-01-28 06:31:07,379 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:07,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 3/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 24. Up to 4 conditions per place. [2023-01-28 06:31:07,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 312 [2023-01-28 06:31:08,103 INFO L134 LiptonReduction]: Checked pairs total: 276 [2023-01-28 06:31:08,104 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-01-28 06:31:08,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:31:08,106 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:08,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:31:08,108 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-28 06:31:08,108 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:31:08,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:08,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 06:31:08,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:31:08,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1297119197, now seen corresponding path program 1 times [2023-01-28 06:31:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386458177] [2023-01-28 06:31:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:08,123 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:31:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:08,142 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:31:08,143 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:31:08,143 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:31:08,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:31:08,143 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:31:08,144 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:31:08,144 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:31:08,144 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 06:31:08,154 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:31:08,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:08,162 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-01-28 06:31:08,162 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:31:08,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-01-28 06:31:08,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:08,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:08,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:08,163 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:08,163 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:08,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:08,170 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-01-28 06:31:08,170 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:31:08,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-01-28 06:31:08,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-01-28 06:31:08,810 INFO L134 LiptonReduction]: Checked pairs total: 2877 [2023-01-28 06:31:08,810 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-01-28 06:31:08,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:31:08,816 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:08,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:31:08,818 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-01-28 06:31:08,818 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:31:08,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:08,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:08,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:31:08,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -807250170, now seen corresponding path program 1 times [2023-01-28 06:31:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045232579] [2023-01-28 06:31:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:08,895 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 06:31:08,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:08,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045232579] [2023-01-28 06:31:08,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045232579] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:08,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:08,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:31:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459011133] [2023-01-28 06:31:08,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:08,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:08,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:08,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 86 [2023-01-28 06:31:08,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:08,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:08,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 86 [2023-01-28 06:31:08,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:08,939 INFO L130 PetriNetUnfolder]: 117/242 cut-off events. [2023-01-28 06:31:08,939 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 06:31:08,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 242 events. 117/242 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1132 event pairs, 76 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 190. Up to 174 conditions per place. [2023-01-28 06:31:08,940 INFO L137 encePairwiseOnDemand]: 77/86 looper letters, 15 selfloop transitions, 5 changer transitions 8/31 dead transitions. [2023-01-28 06:31:08,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 135 flow [2023-01-28 06:31:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-01-28 06:31:08,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2023-01-28 06:31:08,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-01-28 06:31:08,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-01-28 06:31:08,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:08,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-01-28 06:31:08,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:08,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:08,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:08,944 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 124 transitions. [2023-01-28 06:31:08,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 135 flow [2023-01-28 06:31:08,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 133 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 06:31:08,945 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 67 flow [2023-01-28 06:31:08,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-01-28 06:31:08,946 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-01-28 06:31:08,946 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 67 flow [2023-01-28 06:31:08,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:08,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:08,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:08,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:31:08,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:31:08,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2092431508, now seen corresponding path program 1 times [2023-01-28 06:31:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:08,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385688625] [2023-01-28 06:31:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:31:09,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:09,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385688625] [2023-01-28 06:31:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385688625] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:09,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:31:09,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16874204] [2023-01-28 06:31:09,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:09,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:09,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:09,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 86 [2023-01-28 06:31:09,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:09,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:09,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 86 [2023-01-28 06:31:09,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:09,083 INFO L130 PetriNetUnfolder]: 17/79 cut-off events. [2023-01-28 06:31:09,083 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 06:31:09,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 79 events. 17/79 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 257 event pairs, 7 based on Foata normal form. 6/84 useless extension candidates. Maximal degree in co-relation 82. Up to 26 conditions per place. [2023-01-28 06:31:09,084 INFO L137 encePairwiseOnDemand]: 82/86 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-01-28 06:31:09,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 90 flow [2023-01-28 06:31:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-01-28 06:31:09,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2023-01-28 06:31:09,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-01-28 06:31:09,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-01-28 06:31:09,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:09,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-01-28 06:31:09,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:09,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:09,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:09,088 INFO L175 Difference]: Start difference. First operand has 27 places, 19 transitions, 67 flow. Second operand 3 states and 127 transitions. [2023-01-28 06:31:09,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 90 flow [2023-01-28 06:31:09,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 06:31:09,089 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-01-28 06:31:09,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-01-28 06:31:09,090 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-01-28 06:31:09,090 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-01-28 06:31:09,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:09,090 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 06:31:09,091 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 06:31:09,091 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 06:31:09,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:31:09,091 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:31:09,091 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 06:31:09,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:09,101 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-01-28 06:31:09,102 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:31:09,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-01-28 06:31:09,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:09,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:09,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:09,103 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:09,103 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:09,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions, 114 flow [2023-01-28 06:31:09,109 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2023-01-28 06:31:09,109 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:31:09,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2023-01-28 06:31:09,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-01-28 06:31:09,722 INFO L134 LiptonReduction]: Checked pairs total: 2481 [2023-01-28 06:31:09,722 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-01-28 06:31:09,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:31:09,734 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:09,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:31:09,739 INFO L130 PetriNetUnfolder]: 1/27 cut-off events. [2023-01-28 06:31:09,739 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:31:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:09,739 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 06:31:09,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:31:09,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -650651627, now seen corresponding path program 1 times [2023-01-28 06:31:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742760124] [2023-01-28 06:31:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:09,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:09,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:31:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:09,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:31:09,785 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:31:09,785 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:31:09,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:31:09,785 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:31:09,786 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:31:09,786 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:31:09,786 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 06:31:09,812 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:31:09,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:09,827 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-01-28 06:31:09,827 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:31:09,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-01-28 06:31:09,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:09,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:09,829 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:09,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:09,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:09,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:09,836 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-01-28 06:31:09,836 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:31:09,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-01-28 06:31:09,838 INFO L119 LiptonReduction]: Number of co-enabled transitions 1872 [2023-01-28 06:31:10,599 INFO L134 LiptonReduction]: Checked pairs total: 6517 [2023-01-28 06:31:10,600 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-01-28 06:31:10,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:31:10,601 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:10,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 06:31:10,602 INFO L130 PetriNetUnfolder]: 1/14 cut-off events. [2023-01-28 06:31:10,602 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:31:10,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:10,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:10,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:31:10,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 572751387, now seen corresponding path program 1 times [2023-01-28 06:31:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9873686] [2023-01-28 06:31:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:10,646 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 06:31:10,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:10,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9873686] [2023-01-28 06:31:10,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9873686] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:10,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:10,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:31:10,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803080233] [2023-01-28 06:31:10,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:10,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:10,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:10,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 108 [2023-01-28 06:31:10,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:10,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 108 [2023-01-28 06:31:10,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:10,813 INFO L130 PetriNetUnfolder]: 1667/2686 cut-off events. [2023-01-28 06:31:10,813 INFO L131 PetriNetUnfolder]: For 376/376 co-relation queries the response was YES. [2023-01-28 06:31:10,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5589 conditions, 2686 events. 1667/2686 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16206 event pairs, 996 based on Foata normal form. 0/2568 useless extension candidates. Maximal degree in co-relation 774. Up to 1800 conditions per place. [2023-01-28 06:31:10,822 INFO L137 encePairwiseOnDemand]: 94/108 looper letters, 34 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-01-28 06:31:10,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 203 flow [2023-01-28 06:31:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-01-28 06:31:10,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2023-01-28 06:31:10,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-01-28 06:31:10,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-01-28 06:31:10,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:10,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-01-28 06:31:10,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,833 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 87 flow. Second operand 3 states and 154 transitions. [2023-01-28 06:31:10,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 203 flow [2023-01-28 06:31:10,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 195 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-28 06:31:10,836 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 125 flow [2023-01-28 06:31:10,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-01-28 06:31:10,837 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-01-28 06:31:10,837 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 125 flow [2023-01-28 06:31:10,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:10,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:31:10,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:31:10,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1964101372, now seen corresponding path program 1 times [2023-01-28 06:31:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228683246] [2023-01-28 06:31:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:31:10,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228683246] [2023-01-28 06:31:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228683246] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:10,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:31:10,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177901188] [2023-01-28 06:31:10,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:10,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:10,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 108 [2023-01-28 06:31:10,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:10,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 108 [2023-01-28 06:31:10,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:10,943 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2023-01-28 06:31:10,943 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-01-28 06:31:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1138 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 311. Up to 58 conditions per place. [2023-01-28 06:31:10,944 INFO L137 encePairwiseOnDemand]: 102/108 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-01-28 06:31:10,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 133 flow [2023-01-28 06:31:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-01-28 06:31:10,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2023-01-28 06:31:10,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-01-28 06:31:10,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-01-28 06:31:10,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:10,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-01-28 06:31:10,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,948 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 125 flow. Second operand 3 states and 155 transitions. [2023-01-28 06:31:10,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 133 flow [2023-01-28 06:31:10,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 06:31:10,950 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-01-28 06:31:10,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-01-28 06:31:10,951 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-01-28 06:31:10,951 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-01-28 06:31:10,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:10,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 06:31:10,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 06:31:10,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 06:31:10,952 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 06:31:10,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:31:10,952 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:31:10,953 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:31:10,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:10,958 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-01-28 06:31:10,958 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:31:10,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-01-28 06:31:10,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:10,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:10,959 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:10,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:10,959 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2023-01-28 06:31:10,963 INFO L130 PetriNetUnfolder]: 7/98 cut-off events. [2023-01-28 06:31:10,963 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:31:10,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 98 events. 7/98 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 77. Up to 8 conditions per place. [2023-01-28 06:31:10,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 1872 [2023-01-28 06:31:11,687 INFO L134 LiptonReduction]: Checked pairs total: 6625 [2023-01-28 06:31:11,688 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-01-28 06:31:11,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:31:11,689 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:11,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:31:11,691 INFO L130 PetriNetUnfolder]: 3/41 cut-off events. [2023-01-28 06:31:11,691 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:31:11,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:11,691 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 06:31:11,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:31:11,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1528387706, now seen corresponding path program 1 times [2023-01-28 06:31:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:11,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942302709] [2023-01-28 06:31:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:11,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:31:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:11,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:31:11,707 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:31:11,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:31:11,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 06:31:11,707 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:31:11,708 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:31:11,708 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:31:11,708 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 06:31:11,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:31:11,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:11,726 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-01-28 06:31:11,726 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:31:11,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-28 06:31:11,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:11,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:11,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:11,727 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:11,727 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:11,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:11,732 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-01-28 06:31:11,732 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:31:11,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-28 06:31:11,734 INFO L119 LiptonReduction]: Number of co-enabled transitions 3120 [2023-01-28 06:31:12,290 INFO L134 LiptonReduction]: Checked pairs total: 11569 [2023-01-28 06:31:12,291 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-01-28 06:31:12,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:31:12,292 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:12,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 06:31:12,293 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-28 06:31:12,293 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:31:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:12,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:12,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 06:31:12,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1744199643, now seen corresponding path program 1 times [2023-01-28 06:31:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175507484] [2023-01-28 06:31:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:12,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:12,335 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 06:31:12,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:12,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175507484] [2023-01-28 06:31:12,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175507484] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:12,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:31:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708841155] [2023-01-28 06:31:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:12,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:12,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:12,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:12,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 128 [2023-01-28 06:31:12,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:12,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:12,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 128 [2023-01-28 06:31:12,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:13,973 INFO L130 PetriNetUnfolder]: 20839/29905 cut-off events. [2023-01-28 06:31:13,974 INFO L131 PetriNetUnfolder]: For 6083/6083 co-relation queries the response was YES. [2023-01-28 06:31:14,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62504 conditions, 29905 events. 20839/29905 cut-off events. For 6083/6083 co-relation queries the response was YES. Maximal size of possible extension queue 1733. Compared 208187 event pairs, 12105 based on Foata normal form. 912/29041 useless extension candidates. Maximal degree in co-relation 5966. Up to 18751 conditions per place. [2023-01-28 06:31:14,173 INFO L137 encePairwiseOnDemand]: 109/128 looper letters, 46 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2023-01-28 06:31:14,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 279 flow [2023-01-28 06:31:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-28 06:31:14,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-01-28 06:31:14,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-28 06:31:14,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-28 06:31:14,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:14,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-28 06:31:14,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,176 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 116 flow. Second operand 3 states and 184 transitions. [2023-01-28 06:31:14,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 279 flow [2023-01-28 06:31:14,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 261 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-28 06:31:14,182 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2023-01-28 06:31:14,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-28 06:31:14,183 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-01-28 06:31:14,183 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2023-01-28 06:31:14,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:14,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:14,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 06:31:14,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 06:31:14,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash -519564482, now seen corresponding path program 1 times [2023-01-28 06:31:14,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:14,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336024328] [2023-01-28 06:31:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:14,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:31:14,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:14,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336024328] [2023-01-28 06:31:14,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336024328] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:14,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:14,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:31:14,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591388728] [2023-01-28 06:31:14,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:14,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:14,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:14,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:14,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 128 [2023-01-28 06:31:14,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:14,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 128 [2023-01-28 06:31:14,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:14,269 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2023-01-28 06:31:14,269 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-01-28 06:31:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4263 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 879. Up to 164 conditions per place. [2023-01-28 06:31:14,271 INFO L137 encePairwiseOnDemand]: 120/128 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-01-28 06:31:14,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2023-01-28 06:31:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-28 06:31:14,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-01-28 06:31:14,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-28 06:31:14,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-28 06:31:14,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:14,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-28 06:31:14,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,273 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 3 states and 184 transitions. [2023-01-28 06:31:14,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2023-01-28 06:31:14,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 06:31:14,275 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-01-28 06:31:14,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-01-28 06:31:14,275 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2023-01-28 06:31:14,275 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-01-28 06:31:14,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:14,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-01-28 06:31:14,275 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-28 06:31:14,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-28 06:31:14,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-28 06:31:14,276 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-28 06:31:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:31:14,276 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:31:14,276 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:31:14,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:14,282 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-01-28 06:31:14,282 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:31:14,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-28 06:31:14,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:14,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:14,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:14,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:14,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 77 transitions, 186 flow [2023-01-28 06:31:14,287 INFO L130 PetriNetUnfolder]: 9/123 cut-off events. [2023-01-28 06:31:14,288 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:31:14,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 123 events. 9/123 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 224 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-01-28 06:31:14,289 INFO L119 LiptonReduction]: Number of co-enabled transitions 3120 [2023-01-28 06:31:14,807 INFO L134 LiptonReduction]: Checked pairs total: 13665 [2023-01-28 06:31:14,807 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-01-28 06:31:14,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:31:14,808 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:14,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:31:14,811 INFO L130 PetriNetUnfolder]: 3/51 cut-off events. [2023-01-28 06:31:14,811 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 06:31:14,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:14,811 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:14,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:31:14,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1882683571, now seen corresponding path program 1 times [2023-01-28 06:31:14,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:14,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415270900] [2023-01-28 06:31:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:14,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:14,819 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:31:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:14,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:31:14,826 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:31:14,826 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:31:14,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 06:31:14,826 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:31:14,826 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:31:14,826 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:31:14,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 06:31:14,848 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:31:14,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:14,855 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-01-28 06:31:14,856 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:31:14,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-01-28 06:31:14,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:14,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:14,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:14,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:14,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:14,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:14,863 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-01-28 06:31:14,863 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:31:14,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-01-28 06:31:14,866 INFO L119 LiptonReduction]: Number of co-enabled transitions 4680 [2023-01-28 06:31:15,774 INFO L134 LiptonReduction]: Checked pairs total: 18127 [2023-01-28 06:31:15,775 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-01-28 06:31:15,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:31:15,776 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:15,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-28 06:31:15,777 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-28 06:31:15,777 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:31:15,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:15,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:15,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 06:31:15,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:15,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1200455209, now seen corresponding path program 1 times [2023-01-28 06:31:15,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232854017] [2023-01-28 06:31:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:15,797 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 06:31:15,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:15,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232854017] [2023-01-28 06:31:15,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232854017] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:15,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:15,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:31:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413703889] [2023-01-28 06:31:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:15,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 150 [2023-01-28 06:31:15,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:15,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:15,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 150 [2023-01-28 06:31:15,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:29,147 INFO L130 PetriNetUnfolder]: 189321/251344 cut-off events. [2023-01-28 06:31:29,148 INFO L131 PetriNetUnfolder]: For 67150/67150 co-relation queries the response was YES. [2023-01-28 06:31:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527099 conditions, 251344 events. 189321/251344 cut-off events. For 67150/67150 co-relation queries the response was YES. Maximal size of possible extension queue 10541. Compared 1802998 event pairs, 106256 based on Foata normal form. 0/236979 useless extension candidates. Maximal degree in co-relation 57177. Up to 150074 conditions per place. [2023-01-28 06:31:30,589 INFO L137 encePairwiseOnDemand]: 128/150 looper letters, 56 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2023-01-28 06:31:30,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 351 flow [2023-01-28 06:31:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2023-01-28 06:31:30,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-01-28 06:31:30,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2023-01-28 06:31:30,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2023-01-28 06:31:30,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:30,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2023-01-28 06:31:30,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,592 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 147 flow. Second operand 3 states and 210 transitions. [2023-01-28 06:31:30,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 351 flow [2023-01-28 06:31:30,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 319 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-01-28 06:31:30,667 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 199 flow [2023-01-28 06:31:30,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-01-28 06:31:30,667 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-01-28 06:31:30,667 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 199 flow [2023-01-28 06:31:30,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:30,668 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:30,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 06:31:30,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 06:31:30,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1322325534, now seen corresponding path program 1 times [2023-01-28 06:31:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840768851] [2023-01-28 06:31:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:30,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:31:30,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840768851] [2023-01-28 06:31:30,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840768851] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:30,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:30,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:31:30,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655491892] [2023-01-28 06:31:30,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:30,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:30,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:30,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:30,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:30,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 150 [2023-01-28 06:31:30,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:30,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 150 [2023-01-28 06:31:30,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:30,955 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2023-01-28 06:31:30,955 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-01-28 06:31:30,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13505 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2227. Up to 436 conditions per place. [2023-01-28 06:31:30,958 INFO L137 encePairwiseOnDemand]: 140/150 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2023-01-28 06:31:30,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2023-01-28 06:31:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:31:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:31:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-01-28 06:31:30,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2023-01-28 06:31:30,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-01-28 06:31:30,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-01-28 06:31:30,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:30,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-01-28 06:31:30,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,960 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 199 flow. Second operand 3 states and 213 transitions. [2023-01-28 06:31:30,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2023-01-28 06:31:30,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 06:31:30,963 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-01-28 06:31:30,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-01-28 06:31:30,964 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-01-28 06:31:30,964 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-01-28 06:31:30,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:30,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-28 06:31:30,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-28 06:31:30,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-28 06:31:30,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-28 06:31:30,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-28 06:31:30,965 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-28 06:31:30,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 06:31:30,965 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 06:31:30,965 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 06:31:30,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:30,972 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-01-28 06:31:30,972 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:31:30,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-01-28 06:31:30,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:30,973 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:30,973 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:30,973 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:30,974 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:30,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 90 transitions, 225 flow [2023-01-28 06:31:30,981 INFO L130 PetriNetUnfolder]: 11/148 cut-off events. [2023-01-28 06:31:30,981 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:31:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 148 events. 11/148 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 281 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 136. Up to 12 conditions per place. [2023-01-28 06:31:30,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 4680 [2023-01-28 06:31:31,901 INFO L134 LiptonReduction]: Checked pairs total: 18397 [2023-01-28 06:31:31,902 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-01-28 06:31:31,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:31:31,903 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:31,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:31:31,906 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2023-01-28 06:31:31,906 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 06:31:31,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:31,906 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:31,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:31:31,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1776848280, now seen corresponding path program 1 times [2023-01-28 06:31:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951987049] [2023-01-28 06:31:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:31,914 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:31:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:31:31,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:31:31,921 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:31:31,921 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:31:31,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 06:31:31,921 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:31:31,921 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:31:31,921 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:31:31,921 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-28 06:31:31,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:31:31,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 266 flow [2023-01-28 06:31:31,942 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-01-28 06:31:31,942 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:31:31,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 13/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-01-28 06:31:31,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 103 transitions, 266 flow [2023-01-28 06:31:31,943 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 103 transitions, 266 flow [2023-01-28 06:31:31,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:31:31,943 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 103 transitions, 266 flow [2023-01-28 06:31:31,943 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 103 transitions, 266 flow [2023-01-28 06:31:31,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 103 transitions, 266 flow [2023-01-28 06:31:31,950 INFO L130 PetriNetUnfolder]: 13/173 cut-off events. [2023-01-28 06:31:31,951 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 06:31:31,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 173 events. 13/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 335 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2023-01-28 06:31:31,954 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-01-28 06:31:32,866 INFO L134 LiptonReduction]: Checked pairs total: 29552 [2023-01-28 06:31:32,866 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-01-28 06:31:32,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:31:32,867 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;@70d2849b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:31:32,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-28 06:31:32,868 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2023-01-28 06:31:32,868 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:31:32,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:32,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:32,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-28 06:31:32,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1039992346, now seen corresponding path program 1 times [2023-01-28 06:31:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:32,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86691101] [2023-01-28 06:31:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:32,882 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 06:31:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:32,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86691101] [2023-01-28 06:31:32,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86691101] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:32,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:32,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:31:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854123848] [2023-01-28 06:31:32,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:31:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:31:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:31:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 168 [2023-01-28 06:31:32,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:32,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:32,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 168 [2023-01-28 06:31:32,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand