/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 00:20:19,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 00:20:19,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 00:20:19,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 00:20:19,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 00:20:19,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 00:20:19,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 00:20:19,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 00:20:19,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 00:20:19,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 00:20:19,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 00:20:19,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 00:20:19,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 00:20:19,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 00:20:19,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 00:20:19,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 00:20:19,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 00:20:19,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 00:20:19,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 00:20:19,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 00:20:19,488 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 00:20:19,509 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 00:20:19,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 00:20:19,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 00:20:19,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 00:20:19,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 00:20:19,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 00:20:19,511 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 00:20:19,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 00:20:19,511 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 00:20:19,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 00:20:19,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 00:20:19,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 00:20:19,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 00:20:19,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 00:20:19,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 00:20:19,512 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 00:20:19,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 00:20:19,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:20:19,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 00:20:19,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 00:20:19,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 00:20:19,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 00:20:19,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 00:20:19,514 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 00:20:19,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 00:20:19,515 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 00:20:19,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 00:20:19,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 00:20:19,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 00:20:19,725 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 00:20:19,725 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 00:20:19,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-01-28 00:20:20,629 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 00:20:20,846 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 00:20:20,846 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-01-28 00:20:20,854 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b756958/ba52ebaeae8249d9b54314d07a7b77de/FLAG74ec8b5ac [2023-01-28 00:20:20,864 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b756958/ba52ebaeae8249d9b54314d07a7b77de [2023-01-28 00:20:20,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 00:20:20,867 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 00:20:20,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 00:20:20,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 00:20:20,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 00:20:20,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:20:20" (1/1) ... [2023-01-28 00:20:20,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb936d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:20, skipping insertion in model container [2023-01-28 00:20:20,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:20:20" (1/1) ... [2023-01-28 00:20:20,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 00:20:20,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 00:20:21,169 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/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-01-28 00:20:21,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:20:21,183 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 00:20:21,224 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/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-01-28 00:20:21,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 00:20:21,252 INFO L208 MainTranslator]: Completed translation [2023-01-28 00:20:21,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21 WrapperNode [2023-01-28 00:20:21,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 00:20:21,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 00:20:21,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 00:20:21,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 00:20:21,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,287 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2023-01-28 00:20:21,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 00:20:21,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 00:20:21,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 00:20:21,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 00:20:21,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,302 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 00:20:21,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 00:20:21,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 00:20:21,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 00:20:21,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (1/1) ... [2023-01-28 00:20:21,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 00:20:21,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 00:20:21,328 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 00:20:21,338 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 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 00:20:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 00:20:21,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 00:20:21,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 00:20:21,357 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 00:20:21,457 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 00:20:21,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 00:20:21,704 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 00:20:21,767 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 00:20:21,767 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 00:20:21,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:20:21 BoogieIcfgContainer [2023-01-28 00:20:21,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 00:20:21,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 00:20:21,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 00:20:21,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 00:20:21,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:20:20" (1/3) ... [2023-01-28 00:20:21,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28342fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:20:21, skipping insertion in model container [2023-01-28 00:20:21,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:20:21" (2/3) ... [2023-01-28 00:20:21,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28342fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:20:21, skipping insertion in model container [2023-01-28 00:20:21,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:20:21" (3/3) ... [2023-01-28 00:20:21,775 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-01-28 00:20:21,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 00:20:21,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 00:20:21,787 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 00:20:21,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:21,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2023-01-28 00:20:21,888 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2023-01-28 00:20:21,888 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:20:21,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 10/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-28 00:20:21,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 91 transitions, 187 flow [2023-01-28 00:20:21,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 91 transitions, 187 flow [2023-01-28 00:20:21,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:21,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 91 transitions, 187 flow [2023-01-28 00:20:21,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 91 transitions, 187 flow [2023-01-28 00:20:21,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2023-01-28 00:20:21,920 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2023-01-28 00:20:21,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:20:21,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 10/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-01-28 00:20:21,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 1612 [2023-01-28 00:20:23,204 INFO L134 LiptonReduction]: Checked pairs total: 2202 [2023-01-28 00:20:23,205 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-01-28 00:20:23,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:23,219 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:23,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:23,222 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-01-28 00:20:23,222 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 00:20:23,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:23,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 00:20:23,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:23,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash 439100169, now seen corresponding path program 1 times [2023-01-28 00:20:23,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:23,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783404795] [2023-01-28 00:20:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:23,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:23,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:23,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:23,316 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:23,317 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 00:20:23,318 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:23,320 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:23,320 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:23,320 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 00:20:23,341 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:23,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2023-01-28 00:20:23,365 INFO L130 PetriNetUnfolder]: 19/176 cut-off events. [2023-01-28 00:20:23,366 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 00:20:23,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 176 events. 19/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-01-28 00:20:23,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 320 flow [2023-01-28 00:20:23,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 154 transitions, 320 flow [2023-01-28 00:20:23,369 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:23,369 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 154 transitions, 320 flow [2023-01-28 00:20:23,369 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 154 transitions, 320 flow [2023-01-28 00:20:23,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2023-01-28 00:20:23,389 INFO L130 PetriNetUnfolder]: 19/176 cut-off events. [2023-01-28 00:20:23,390 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 00:20:23,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 176 events. 19/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-01-28 00:20:23,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 11036 [2023-01-28 00:20:24,808 INFO L134 LiptonReduction]: Checked pairs total: 20186 [2023-01-28 00:20:24,809 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-01-28 00:20:24,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:24,811 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:24,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:24,815 INFO L130 PetriNetUnfolder]: 2/33 cut-off events. [2023-01-28 00:20:24,816 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 00:20:24,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:24,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 00:20:24,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:24,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash -630136530, now seen corresponding path program 1 times [2023-01-28 00:20:24,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:24,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691043494] [2023-01-28 00:20:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:24,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:24,833 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:24,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:24,845 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:24,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:24,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 00:20:24,845 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:24,846 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:24,846 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:24,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 00:20:24,874 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:24,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 455 flow [2023-01-28 00:20:24,905 INFO L130 PetriNetUnfolder]: 28/251 cut-off events. [2023-01-28 00:20:24,905 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 00:20:24,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 251 events. 28/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-01-28 00:20:24,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 455 flow [2023-01-28 00:20:24,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 455 flow [2023-01-28 00:20:24,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:24,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 455 flow [2023-01-28 00:20:24,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 455 flow [2023-01-28 00:20:24,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 455 flow [2023-01-28 00:20:24,935 INFO L130 PetriNetUnfolder]: 28/251 cut-off events. [2023-01-28 00:20:24,936 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 00:20:24,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 251 events. 28/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-01-28 00:20:24,948 INFO L119 LiptonReduction]: Number of co-enabled transitions 28272 [2023-01-28 00:20:26,810 INFO L134 LiptonReduction]: Checked pairs total: 57548 [2023-01-28 00:20:26,811 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-01-28 00:20:26,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:26,813 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:26,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:26,817 INFO L130 PetriNetUnfolder]: 7/63 cut-off events. [2023-01-28 00:20:26,817 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 00:20:26,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:26,817 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 00:20:26,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:26,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1774801914, now seen corresponding path program 1 times [2023-01-28 00:20:26,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:26,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655097625] [2023-01-28 00:20:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:26,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:26,832 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:26,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:26,846 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:26,846 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 00:20:26,846 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:26,847 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:26,847 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:26,847 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 00:20:26,876 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:26,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 280 transitions, 592 flow [2023-01-28 00:20:26,910 INFO L130 PetriNetUnfolder]: 37/326 cut-off events. [2023-01-28 00:20:26,910 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 00:20:26,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 326 events. 37/326 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1138 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 10 conditions per place. [2023-01-28 00:20:26,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 280 transitions, 592 flow [2023-01-28 00:20:26,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 280 transitions, 592 flow [2023-01-28 00:20:26,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:26,916 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 280 transitions, 592 flow [2023-01-28 00:20:26,916 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 280 transitions, 592 flow [2023-01-28 00:20:26,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 280 transitions, 592 flow [2023-01-28 00:20:26,946 INFO L130 PetriNetUnfolder]: 37/326 cut-off events. [2023-01-28 00:20:26,946 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 00:20:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 326 events. 37/326 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1138 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 10 conditions per place. [2023-01-28 00:20:26,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 53320 [2023-01-28 00:20:28,846 INFO L134 LiptonReduction]: Checked pairs total: 109875 [2023-01-28 00:20:28,846 INFO L136 LiptonReduction]: Total number of compositions: 228 [2023-01-28 00:20:28,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:28,848 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:28,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:28,854 INFO L130 PetriNetUnfolder]: 12/95 cut-off events. [2023-01-28 00:20:28,854 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 00:20:28,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:28,854 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:28,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:28,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1252805735, now seen corresponding path program 1 times [2023-01-28 00:20:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:28,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131687755] [2023-01-28 00:20:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:28,871 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:28,885 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:28,885 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:28,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:28,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 00:20:28,886 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:28,886 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:28,886 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:28,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 00:20:28,914 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:28,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 343 transitions, 731 flow [2023-01-28 00:20:28,965 INFO L130 PetriNetUnfolder]: 46/401 cut-off events. [2023-01-28 00:20:28,965 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 00:20:28,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 401 events. 46/401 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1522 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-01-28 00:20:28,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 343 transitions, 731 flow [2023-01-28 00:20:28,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 343 transitions, 731 flow [2023-01-28 00:20:28,973 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:28,973 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 343 transitions, 731 flow [2023-01-28 00:20:28,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 343 transitions, 731 flow [2023-01-28 00:20:28,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 343 transitions, 731 flow [2023-01-28 00:20:29,019 INFO L130 PetriNetUnfolder]: 46/401 cut-off events. [2023-01-28 00:20:29,019 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 00:20:29,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 401 events. 46/401 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1522 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-01-28 00:20:29,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 86180 [2023-01-28 00:20:31,395 INFO L134 LiptonReduction]: Checked pairs total: 177753 [2023-01-28 00:20:31,395 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-01-28 00:20:31,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:31,397 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:31,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:31,405 INFO L130 PetriNetUnfolder]: 13/116 cut-off events. [2023-01-28 00:20:31,405 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 00:20:31,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:31,406 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:31,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:31,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash -528600392, now seen corresponding path program 1 times [2023-01-28 00:20:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112864316] [2023-01-28 00:20:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:31,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:31,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:31,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:31,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:31,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:31,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 00:20:31,456 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:31,456 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:31,456 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:31,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-28 00:20:31,490 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:31,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 370 places, 406 transitions, 872 flow [2023-01-28 00:20:31,554 INFO L130 PetriNetUnfolder]: 55/476 cut-off events. [2023-01-28 00:20:31,554 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 00:20:31,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 476 events. 55/476 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1910 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 420. Up to 14 conditions per place. [2023-01-28 00:20:31,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 370 places, 406 transitions, 872 flow [2023-01-28 00:20:31,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 370 places, 406 transitions, 872 flow [2023-01-28 00:20:31,566 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:31,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 370 places, 406 transitions, 872 flow [2023-01-28 00:20:31,566 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 370 places, 406 transitions, 872 flow [2023-01-28 00:20:31,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 370 places, 406 transitions, 872 flow [2023-01-28 00:20:31,636 INFO L130 PetriNetUnfolder]: 55/476 cut-off events. [2023-01-28 00:20:31,636 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 00:20:31,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 476 events. 55/476 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1910 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 420. Up to 14 conditions per place. [2023-01-28 00:20:31,665 INFO L119 LiptonReduction]: Number of co-enabled transitions 126852 [2023-01-28 00:20:34,231 INFO L134 LiptonReduction]: Checked pairs total: 264382 [2023-01-28 00:20:34,231 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-01-28 00:20:34,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:34,233 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:34,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:34,244 INFO L130 PetriNetUnfolder]: 19/147 cut-off events. [2023-01-28 00:20:34,245 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-28 00:20:34,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:34,245 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:34,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:34,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash -221858652, now seen corresponding path program 1 times [2023-01-28 00:20:34,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:34,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567740522] [2023-01-28 00:20:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:34,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:34,272 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:34,273 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:34,273 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:34,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 00:20:34,273 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:34,273 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:34,273 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:34,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-01-28 00:20:34,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:34,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 469 transitions, 1015 flow [2023-01-28 00:20:34,386 INFO L130 PetriNetUnfolder]: 64/551 cut-off events. [2023-01-28 00:20:34,387 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 00:20:34,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 551 events. 64/551 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2257 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 503. Up to 16 conditions per place. [2023-01-28 00:20:34,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 427 places, 469 transitions, 1015 flow [2023-01-28 00:20:34,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 427 places, 469 transitions, 1015 flow [2023-01-28 00:20:34,402 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:34,402 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 427 places, 469 transitions, 1015 flow [2023-01-28 00:20:34,402 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 427 places, 469 transitions, 1015 flow [2023-01-28 00:20:34,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 469 transitions, 1015 flow [2023-01-28 00:20:34,516 INFO L130 PetriNetUnfolder]: 64/551 cut-off events. [2023-01-28 00:20:34,516 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 00:20:34,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 551 events. 64/551 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2257 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 503. Up to 16 conditions per place. [2023-01-28 00:20:34,553 INFO L119 LiptonReduction]: Number of co-enabled transitions 175336 [2023-01-28 00:20:37,805 INFO L134 LiptonReduction]: Checked pairs total: 375636 [2023-01-28 00:20:37,805 INFO L136 LiptonReduction]: Total number of compositions: 368 [2023-01-28 00:20:37,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:37,807 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:37,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:37,821 INFO L130 PetriNetUnfolder]: 25/185 cut-off events. [2023-01-28 00:20:37,821 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-28 00:20:37,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:37,821 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:37,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:37,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash -282505083, now seen corresponding path program 1 times [2023-01-28 00:20:37,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:37,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306578274] [2023-01-28 00:20:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:37,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:37,848 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:37,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:37,876 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:37,877 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:37,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 00:20:37,878 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:37,879 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:37,879 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:37,879 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-01-28 00:20:37,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:37,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 484 places, 532 transitions, 1160 flow [2023-01-28 00:20:38,027 INFO L130 PetriNetUnfolder]: 73/626 cut-off events. [2023-01-28 00:20:38,027 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 00:20:38,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 626 events. 73/626 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2624 event pairs, 0 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 588. Up to 18 conditions per place. [2023-01-28 00:20:38,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 484 places, 532 transitions, 1160 flow [2023-01-28 00:20:38,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 484 places, 532 transitions, 1160 flow [2023-01-28 00:20:38,044 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:38,044 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 484 places, 532 transitions, 1160 flow [2023-01-28 00:20:38,045 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 484 places, 532 transitions, 1160 flow [2023-01-28 00:20:38,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 484 places, 532 transitions, 1160 flow [2023-01-28 00:20:38,150 INFO L130 PetriNetUnfolder]: 73/626 cut-off events. [2023-01-28 00:20:38,150 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 00:20:38,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 626 events. 73/626 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2624 event pairs, 0 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 588. Up to 18 conditions per place. [2023-01-28 00:20:38,255 INFO L119 LiptonReduction]: Number of co-enabled transitions 231632 [2023-01-28 00:20:41,728 INFO L134 LiptonReduction]: Checked pairs total: 488450 [2023-01-28 00:20:41,728 INFO L136 LiptonReduction]: Total number of compositions: 410 [2023-01-28 00:20:41,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:41,730 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:41,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:41,746 INFO L130 PetriNetUnfolder]: 27/207 cut-off events. [2023-01-28 00:20:41,746 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-28 00:20:41,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:41,746 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:41,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:41,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash 826540551, now seen corresponding path program 1 times [2023-01-28 00:20:41,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476117938] [2023-01-28 00:20:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:41,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:41,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:41,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:41,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 00:20:41,774 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:41,775 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:41,775 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:41,775 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-01-28 00:20:41,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:41,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 595 transitions, 1307 flow [2023-01-28 00:20:41,936 INFO L130 PetriNetUnfolder]: 82/701 cut-off events. [2023-01-28 00:20:41,936 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 00:20:41,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 701 events. 82/701 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2977 event pairs, 0 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 674. Up to 20 conditions per place. [2023-01-28 00:20:41,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 595 transitions, 1307 flow [2023-01-28 00:20:41,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 595 transitions, 1307 flow [2023-01-28 00:20:41,956 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:41,956 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 541 places, 595 transitions, 1307 flow [2023-01-28 00:20:41,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 541 places, 595 transitions, 1307 flow [2023-01-28 00:20:41,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 595 transitions, 1307 flow [2023-01-28 00:20:42,074 INFO L130 PetriNetUnfolder]: 82/701 cut-off events. [2023-01-28 00:20:42,074 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 00:20:42,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 701 events. 82/701 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2977 event pairs, 0 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 674. Up to 20 conditions per place. [2023-01-28 00:20:42,135 INFO L119 LiptonReduction]: Number of co-enabled transitions 295740 [2023-01-28 00:20:45,795 INFO L134 LiptonReduction]: Checked pairs total: 635952 [2023-01-28 00:20:45,796 INFO L136 LiptonReduction]: Total number of compositions: 473 [2023-01-28 00:20:45,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:45,797 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:45,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:45,817 INFO L130 PetriNetUnfolder]: 35/240 cut-off events. [2023-01-28 00:20:45,818 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-28 00:20:45,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:45,818 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:45,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:45,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash -423094892, now seen corresponding path program 1 times [2023-01-28 00:20:45,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:45,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646304392] [2023-01-28 00:20:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:45,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:45,832 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:45,845 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:45,845 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:45,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:45,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 00:20:45,845 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:45,846 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:45,846 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:45,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-01-28 00:20:45,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:45,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 598 places, 658 transitions, 1456 flow [2023-01-28 00:20:46,085 INFO L130 PetriNetUnfolder]: 91/776 cut-off events. [2023-01-28 00:20:46,086 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-28 00:20:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 776 events. 91/776 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3355 event pairs, 0 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 761. Up to 22 conditions per place. [2023-01-28 00:20:46,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 598 places, 658 transitions, 1456 flow [2023-01-28 00:20:46,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 598 places, 658 transitions, 1456 flow [2023-01-28 00:20:46,110 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:46,110 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 598 places, 658 transitions, 1456 flow [2023-01-28 00:20:46,110 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 598 places, 658 transitions, 1456 flow [2023-01-28 00:20:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 598 places, 658 transitions, 1456 flow [2023-01-28 00:20:46,254 INFO L130 PetriNetUnfolder]: 91/776 cut-off events. [2023-01-28 00:20:46,254 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-28 00:20:46,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 776 events. 91/776 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3355 event pairs, 0 based on Foata normal form. 0/664 useless extension candidates. Maximal degree in co-relation 761. Up to 22 conditions per place. [2023-01-28 00:20:46,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 367660 [2023-01-28 00:20:50,922 INFO L134 LiptonReduction]: Checked pairs total: 779380 [2023-01-28 00:20:50,922 INFO L136 LiptonReduction]: Total number of compositions: 527 [2023-01-28 00:20:50,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:50,923 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:50,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:50,955 INFO L130 PetriNetUnfolder]: 37/260 cut-off events. [2023-01-28 00:20:50,955 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-28 00:20:50,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:50,955 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:50,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:50,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -608990272, now seen corresponding path program 1 times [2023-01-28 00:20:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:50,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955101403] [2023-01-28 00:20:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:50,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:50,973 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:50,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:50,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:50,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:50,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 00:20:50,998 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:50,998 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:50,998 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:50,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-01-28 00:20:51,054 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:51,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 655 places, 721 transitions, 1607 flow [2023-01-28 00:20:51,229 INFO L130 PetriNetUnfolder]: 100/851 cut-off events. [2023-01-28 00:20:51,229 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-01-28 00:20:51,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 851 events. 100/851 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3729 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 849. Up to 24 conditions per place. [2023-01-28 00:20:51,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 655 places, 721 transitions, 1607 flow [2023-01-28 00:20:51,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 655 places, 721 transitions, 1607 flow [2023-01-28 00:20:51,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:51,259 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 655 places, 721 transitions, 1607 flow [2023-01-28 00:20:51,259 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 655 places, 721 transitions, 1607 flow [2023-01-28 00:20:51,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 655 places, 721 transitions, 1607 flow [2023-01-28 00:20:51,432 INFO L130 PetriNetUnfolder]: 100/851 cut-off events. [2023-01-28 00:20:51,432 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-01-28 00:20:51,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 851 events. 100/851 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3729 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 849. Up to 24 conditions per place. [2023-01-28 00:20:51,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 447392 [2023-01-28 00:20:55,803 INFO L134 LiptonReduction]: Checked pairs total: 940550 [2023-01-28 00:20:55,803 INFO L136 LiptonReduction]: Total number of compositions: 574 [2023-01-28 00:20:55,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:20:55,804 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:20:55,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:20:55,837 INFO L130 PetriNetUnfolder]: 42/297 cut-off events. [2023-01-28 00:20:55,837 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-01-28 00:20:55,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:20:55,838 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:20:55,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:20:55,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:20:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2041386709, now seen corresponding path program 1 times [2023-01-28 00:20:55,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:20:55,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842072415] [2023-01-28 00:20:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:20:55,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:20:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:55,855 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:20:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:20:55,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:20:55,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:20:55,871 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:20:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 00:20:55,871 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:20:55,871 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:20:55,872 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:20:55,872 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-01-28 00:20:55,923 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:20:55,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 712 places, 784 transitions, 1760 flow [2023-01-28 00:20:56,125 INFO L130 PetriNetUnfolder]: 109/926 cut-off events. [2023-01-28 00:20:56,125 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-01-28 00:20:56,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 926 events. 109/926 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4109 event pairs, 0 based on Foata normal form. 0/792 useless extension candidates. Maximal degree in co-relation 938. Up to 26 conditions per place. [2023-01-28 00:20:56,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 712 places, 784 transitions, 1760 flow [2023-01-28 00:20:56,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 712 places, 784 transitions, 1760 flow [2023-01-28 00:20:56,160 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:20:56,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 712 places, 784 transitions, 1760 flow [2023-01-28 00:20:56,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 712 places, 784 transitions, 1760 flow [2023-01-28 00:20:56,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 712 places, 784 transitions, 1760 flow [2023-01-28 00:20:56,434 INFO L130 PetriNetUnfolder]: 109/926 cut-off events. [2023-01-28 00:20:56,435 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-01-28 00:20:56,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 926 events. 109/926 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4109 event pairs, 0 based on Foata normal form. 0/792 useless extension candidates. Maximal degree in co-relation 938. Up to 26 conditions per place. [2023-01-28 00:20:56,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 534936 [2023-01-28 00:21:01,512 INFO L134 LiptonReduction]: Checked pairs total: 1128286 [2023-01-28 00:21:01,512 INFO L136 LiptonReduction]: Total number of compositions: 614 [2023-01-28 00:21:01,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:01,514 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:01,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:01,548 INFO L130 PetriNetUnfolder]: 44/321 cut-off events. [2023-01-28 00:21:01,548 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-01-28 00:21:01,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:01,549 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:01,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:01,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1785523453, now seen corresponding path program 1 times [2023-01-28 00:21:01,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:01,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184889524] [2023-01-28 00:21:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:01,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:01,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:01,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:01,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:01,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:01,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 00:21:01,606 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:01,607 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:01,607 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:01,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-01-28 00:21:01,679 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:01,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 769 places, 847 transitions, 1915 flow [2023-01-28 00:21:01,927 INFO L130 PetriNetUnfolder]: 118/1001 cut-off events. [2023-01-28 00:21:01,927 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-01-28 00:21:01,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1001 events. 118/1001 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4473 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 1028. Up to 28 conditions per place. [2023-01-28 00:21:01,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 769 places, 847 transitions, 1915 flow [2023-01-28 00:21:01,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 847 transitions, 1915 flow [2023-01-28 00:21:01,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:01,970 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 769 places, 847 transitions, 1915 flow [2023-01-28 00:21:01,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 769 places, 847 transitions, 1915 flow [2023-01-28 00:21:01,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 769 places, 847 transitions, 1915 flow [2023-01-28 00:21:02,233 INFO L130 PetriNetUnfolder]: 118/1001 cut-off events. [2023-01-28 00:21:02,233 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-01-28 00:21:02,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 1001 events. 118/1001 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4473 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 1028. Up to 28 conditions per place. [2023-01-28 00:21:02,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 630292 [2023-01-28 00:21:08,207 INFO L134 LiptonReduction]: Checked pairs total: 1341615 [2023-01-28 00:21:08,207 INFO L136 LiptonReduction]: Total number of compositions: 679 [2023-01-28 00:21:08,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:08,209 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:08,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:08,248 INFO L130 PetriNetUnfolder]: 52/353 cut-off events. [2023-01-28 00:21:08,248 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-01-28 00:21:08,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:08,248 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:08,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:08,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash 127424546, now seen corresponding path program 1 times [2023-01-28 00:21:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911237008] [2023-01-28 00:21:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:08,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:08,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:08,296 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:08,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 00:21:08,296 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:08,297 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:08,297 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:08,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-01-28 00:21:08,363 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 826 places, 910 transitions, 2072 flow [2023-01-28 00:21:08,689 INFO L130 PetriNetUnfolder]: 127/1076 cut-off events. [2023-01-28 00:21:08,689 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-01-28 00:21:08,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 127/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4865 event pairs, 0 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 1119. Up to 30 conditions per place. [2023-01-28 00:21:08,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 826 places, 910 transitions, 2072 flow [2023-01-28 00:21:08,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 826 places, 910 transitions, 2072 flow [2023-01-28 00:21:08,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:08,736 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 826 places, 910 transitions, 2072 flow [2023-01-28 00:21:08,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 826 places, 910 transitions, 2072 flow [2023-01-28 00:21:08,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 826 places, 910 transitions, 2072 flow [2023-01-28 00:21:09,021 INFO L130 PetriNetUnfolder]: 127/1076 cut-off events. [2023-01-28 00:21:09,022 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-01-28 00:21:09,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 127/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 4865 event pairs, 0 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 1119. Up to 30 conditions per place. [2023-01-28 00:21:09,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 733460 [2023-01-28 00:21:14,787 INFO L134 LiptonReduction]: Checked pairs total: 1586939 [2023-01-28 00:21:14,788 INFO L136 LiptonReduction]: Total number of compositions: 725 [2023-01-28 00:21:14,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:14,789 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:14,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:14,834 INFO L130 PetriNetUnfolder]: 55/383 cut-off events. [2023-01-28 00:21:14,835 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-01-28 00:21:14,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:14,835 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:14,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:14,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1402274288, now seen corresponding path program 1 times [2023-01-28 00:21:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658821780] [2023-01-28 00:21:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:14,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:14,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:14,890 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:14,890 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:14,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 00:21:14,890 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:14,890 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:14,890 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:14,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-01-28 00:21:14,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:14,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 883 places, 973 transitions, 2231 flow [2023-01-28 00:21:15,315 INFO L130 PetriNetUnfolder]: 136/1151 cut-off events. [2023-01-28 00:21:15,315 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-01-28 00:21:15,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 1151 events. 136/1151 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5240 event pairs, 0 based on Foata normal form. 0/984 useless extension candidates. Maximal degree in co-relation 1211. Up to 32 conditions per place. [2023-01-28 00:21:15,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 883 places, 973 transitions, 2231 flow [2023-01-28 00:21:15,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 883 places, 973 transitions, 2231 flow [2023-01-28 00:21:15,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:15,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 883 places, 973 transitions, 2231 flow [2023-01-28 00:21:15,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 883 places, 973 transitions, 2231 flow [2023-01-28 00:21:15,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 883 places, 973 transitions, 2231 flow [2023-01-28 00:21:15,717 INFO L130 PetriNetUnfolder]: 136/1151 cut-off events. [2023-01-28 00:21:15,717 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-01-28 00:21:15,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 1151 events. 136/1151 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5240 event pairs, 0 based on Foata normal form. 0/984 useless extension candidates. Maximal degree in co-relation 1211. Up to 32 conditions per place. [2023-01-28 00:21:15,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 844440 [2023-01-28 00:21:22,792 INFO L134 LiptonReduction]: Checked pairs total: 1824903 [2023-01-28 00:21:22,792 INFO L136 LiptonReduction]: Total number of compositions: 780 [2023-01-28 00:21:22,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:22,793 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:22,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:22,843 INFO L130 PetriNetUnfolder]: 60/405 cut-off events. [2023-01-28 00:21:22,843 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-01-28 00:21:22,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:22,843 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:22,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:22,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1657160077, now seen corresponding path program 1 times [2023-01-28 00:21:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465452298] [2023-01-28 00:21:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:22,866 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:22,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:22,888 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:22,888 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:22,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 00:21:22,888 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:22,889 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:22,889 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:22,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-01-28 00:21:22,963 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:22,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1036 transitions, 2392 flow [2023-01-28 00:21:23,367 INFO L130 PetriNetUnfolder]: 145/1226 cut-off events. [2023-01-28 00:21:23,367 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-01-28 00:21:23,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 1226 events. 145/1226 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5607 event pairs, 0 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 1304. Up to 34 conditions per place. [2023-01-28 00:21:23,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 940 places, 1036 transitions, 2392 flow [2023-01-28 00:21:23,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 940 places, 1036 transitions, 2392 flow [2023-01-28 00:21:23,425 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:23,425 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 940 places, 1036 transitions, 2392 flow [2023-01-28 00:21:23,425 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 940 places, 1036 transitions, 2392 flow [2023-01-28 00:21:23,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1036 transitions, 2392 flow [2023-01-28 00:21:23,799 INFO L130 PetriNetUnfolder]: 145/1226 cut-off events. [2023-01-28 00:21:23,799 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-01-28 00:21:23,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411 conditions, 1226 events. 145/1226 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 5607 event pairs, 0 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 1304. Up to 34 conditions per place. [2023-01-28 00:21:24,017 INFO L119 LiptonReduction]: Number of co-enabled transitions 963232 [2023-01-28 00:21:30,817 INFO L134 LiptonReduction]: Checked pairs total: 2061306 [2023-01-28 00:21:30,818 INFO L136 LiptonReduction]: Total number of compositions: 820 [2023-01-28 00:21:30,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:30,819 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:30,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:30,881 INFO L130 PetriNetUnfolder]: 66/449 cut-off events. [2023-01-28 00:21:30,881 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-01-28 00:21:30,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:30,881 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:30,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:30,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:30,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1701743203, now seen corresponding path program 1 times [2023-01-28 00:21:30,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:30,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239764721] [2023-01-28 00:21:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:30,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:30,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:30,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:30,937 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:30,937 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:30,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 00:21:30,937 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:30,937 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:30,937 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:30,937 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-01-28 00:21:31,009 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 997 places, 1099 transitions, 2555 flow [2023-01-28 00:21:31,486 INFO L130 PetriNetUnfolder]: 154/1301 cut-off events. [2023-01-28 00:21:31,486 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-01-28 00:21:31,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1301 events. 154/1301 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6007 event pairs, 0 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 1398. Up to 36 conditions per place. [2023-01-28 00:21:31,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 997 places, 1099 transitions, 2555 flow [2023-01-28 00:21:31,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 997 places, 1099 transitions, 2555 flow [2023-01-28 00:21:31,530 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:31,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 997 places, 1099 transitions, 2555 flow [2023-01-28 00:21:31,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 997 places, 1099 transitions, 2555 flow [2023-01-28 00:21:31,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 997 places, 1099 transitions, 2555 flow [2023-01-28 00:21:31,935 INFO L130 PetriNetUnfolder]: 154/1301 cut-off events. [2023-01-28 00:21:31,935 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-01-28 00:21:31,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1301 events. 154/1301 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6007 event pairs, 0 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 1398. Up to 36 conditions per place. [2023-01-28 00:21:32,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 1089836 [2023-01-28 00:21:39,666 INFO L134 LiptonReduction]: Checked pairs total: 2316243 [2023-01-28 00:21:39,666 INFO L136 LiptonReduction]: Total number of compositions: 882 [2023-01-28 00:21:39,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:39,668 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:39,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:39,727 INFO L130 PetriNetUnfolder]: 68/465 cut-off events. [2023-01-28 00:21:39,727 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-01-28 00:21:39,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:39,727 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:39,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:39,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1644266573, now seen corresponding path program 1 times [2023-01-28 00:21:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:39,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138584769] [2023-01-28 00:21:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:39,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:39,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:39,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:39,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 00:21:39,771 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:39,771 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:39,771 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:39,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-01-28 00:21:39,854 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:39,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1054 places, 1162 transitions, 2720 flow [2023-01-28 00:21:40,320 INFO L130 PetriNetUnfolder]: 163/1376 cut-off events. [2023-01-28 00:21:40,320 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-01-28 00:21:40,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 1376 events. 163/1376 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6358 event pairs, 0 based on Foata normal form. 0/1176 useless extension candidates. Maximal degree in co-relation 1493. Up to 38 conditions per place. [2023-01-28 00:21:40,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 1054 places, 1162 transitions, 2720 flow [2023-01-28 00:21:40,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1054 places, 1162 transitions, 2720 flow [2023-01-28 00:21:40,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:40,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1054 places, 1162 transitions, 2720 flow [2023-01-28 00:21:40,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1054 places, 1162 transitions, 2720 flow [2023-01-28 00:21:40,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1054 places, 1162 transitions, 2720 flow [2023-01-28 00:21:40,894 INFO L130 PetriNetUnfolder]: 163/1376 cut-off events. [2023-01-28 00:21:40,894 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-01-28 00:21:40,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 1376 events. 163/1376 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6358 event pairs, 0 based on Foata normal form. 0/1176 useless extension candidates. Maximal degree in co-relation 1493. Up to 38 conditions per place. [2023-01-28 00:21:41,107 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224252 [2023-01-28 00:21:48,753 INFO L134 LiptonReduction]: Checked pairs total: 2620887 [2023-01-28 00:21:48,754 INFO L136 LiptonReduction]: Total number of compositions: 933 [2023-01-28 00:21:48,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:48,755 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:48,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:48,829 INFO L130 PetriNetUnfolder]: 78/509 cut-off events. [2023-01-28 00:21:48,829 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-01-28 00:21:48,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:48,829 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:48,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:48,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash -520845519, now seen corresponding path program 1 times [2023-01-28 00:21:48,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181989783] [2023-01-28 00:21:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:48,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:48,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:48,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:48,930 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:48,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 00:21:48,930 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:48,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:48,930 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:48,930 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-01-28 00:21:49,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:49,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1225 transitions, 2887 flow [2023-01-28 00:21:49,534 INFO L130 PetriNetUnfolder]: 172/1451 cut-off events. [2023-01-28 00:21:49,535 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-01-28 00:21:49,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1451 events. 172/1451 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6735 event pairs, 0 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 1589. Up to 40 conditions per place. [2023-01-28 00:21:49,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 1111 places, 1225 transitions, 2887 flow [2023-01-28 00:21:49,627 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1111 places, 1225 transitions, 2887 flow [2023-01-28 00:21:49,627 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:21:49,627 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1111 places, 1225 transitions, 2887 flow [2023-01-28 00:21:49,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1111 places, 1225 transitions, 2887 flow [2023-01-28 00:21:49,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1225 transitions, 2887 flow [2023-01-28 00:21:50,203 INFO L130 PetriNetUnfolder]: 172/1451 cut-off events. [2023-01-28 00:21:50,203 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-01-28 00:21:50,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1451 events. 172/1451 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 6735 event pairs, 0 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 1589. Up to 40 conditions per place. [2023-01-28 00:21:50,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 1366480 [2023-01-28 00:21:59,372 INFO L134 LiptonReduction]: Checked pairs total: 2910520 [2023-01-28 00:21:59,372 INFO L136 LiptonReduction]: Total number of compositions: 974 [2023-01-28 00:21:59,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:21:59,374 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:21:59,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:21:59,457 INFO L130 PetriNetUnfolder]: 78/532 cut-off events. [2023-01-28 00:21:59,458 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-01-28 00:21:59,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:21:59,458 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:21:59,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:21:59,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:21:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 909094616, now seen corresponding path program 1 times [2023-01-28 00:21:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:21:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379853598] [2023-01-28 00:21:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:21:59,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:21:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:59,496 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:21:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:21:59,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:21:59,524 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:21:59,524 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:21:59,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-28 00:21:59,524 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:21:59,525 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:21:59,525 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:21:59,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-01-28 00:21:59,617 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:21:59,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1168 places, 1288 transitions, 3056 flow [2023-01-28 00:22:00,209 INFO L130 PetriNetUnfolder]: 181/1526 cut-off events. [2023-01-28 00:22:00,210 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-01-28 00:22:00,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 1526 events. 181/1526 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7128 event pairs, 0 based on Foata normal form. 0/1304 useless extension candidates. Maximal degree in co-relation 1686. Up to 42 conditions per place. [2023-01-28 00:22:00,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 1168 places, 1288 transitions, 3056 flow [2023-01-28 00:22:00,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1168 places, 1288 transitions, 3056 flow [2023-01-28 00:22:00,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:22:00,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1168 places, 1288 transitions, 3056 flow [2023-01-28 00:22:00,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1168 places, 1288 transitions, 3056 flow [2023-01-28 00:22:00,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1168 places, 1288 transitions, 3056 flow [2023-01-28 00:22:00,851 INFO L130 PetriNetUnfolder]: 181/1526 cut-off events. [2023-01-28 00:22:00,851 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-01-28 00:22:00,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 1526 events. 181/1526 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7128 event pairs, 0 based on Foata normal form. 0/1304 useless extension candidates. Maximal degree in co-relation 1686. Up to 42 conditions per place. [2023-01-28 00:22:01,207 INFO L119 LiptonReduction]: Number of co-enabled transitions 1516520 [2023-01-28 00:22:10,262 INFO L134 LiptonReduction]: Checked pairs total: 3237949 [2023-01-28 00:22:10,263 INFO L136 LiptonReduction]: Total number of compositions: 1025 [2023-01-28 00:22:10,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:22:10,264 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:22:10,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:22:10,358 INFO L130 PetriNetUnfolder]: 86/564 cut-off events. [2023-01-28 00:22:10,358 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-01-28 00:22:10,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:22:10,358 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:22:10,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:22:10,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:22:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1441880411, now seen corresponding path program 1 times [2023-01-28 00:22:10,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:22:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287250663] [2023-01-28 00:22:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:22:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:22:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:10,385 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:22:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:10,409 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:22:10,409 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:22:10,409 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:22:10,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-28 00:22:10,409 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:22:10,409 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:22:10,410 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:22:10,410 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-01-28 00:22:10,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:22:10,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1225 places, 1351 transitions, 3227 flow [2023-01-28 00:22:11,185 INFO L130 PetriNetUnfolder]: 190/1601 cut-off events. [2023-01-28 00:22:11,185 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-01-28 00:22:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 1601 events. 190/1601 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7474 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1784. Up to 44 conditions per place. [2023-01-28 00:22:11,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 1225 places, 1351 transitions, 3227 flow [2023-01-28 00:22:11,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1225 places, 1351 transitions, 3227 flow [2023-01-28 00:22:11,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:22:11,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1225 places, 1351 transitions, 3227 flow [2023-01-28 00:22:11,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1225 places, 1351 transitions, 3227 flow [2023-01-28 00:22:11,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1225 places, 1351 transitions, 3227 flow [2023-01-28 00:22:11,872 INFO L130 PetriNetUnfolder]: 190/1601 cut-off events. [2023-01-28 00:22:11,872 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-01-28 00:22:11,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 1601 events. 190/1601 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7474 event pairs, 0 based on Foata normal form. 0/1368 useless extension candidates. Maximal degree in co-relation 1784. Up to 44 conditions per place. [2023-01-28 00:22:12,263 INFO L119 LiptonReduction]: Number of co-enabled transitions 1674372 [2023-01-28 00:22:21,865 INFO L134 LiptonReduction]: Checked pairs total: 3555833 [2023-01-28 00:22:21,865 INFO L136 LiptonReduction]: Total number of compositions: 1067 [2023-01-28 00:22:21,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:22:21,866 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:22:21,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:22:21,970 INFO L130 PetriNetUnfolder]: 86/591 cut-off events. [2023-01-28 00:22:21,971 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-01-28 00:22:21,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:22:21,971 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:22:21,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:22:21,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:22:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1988911458, now seen corresponding path program 1 times [2023-01-28 00:22:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:22:21,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429077615] [2023-01-28 00:22:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:22:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:22:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:22,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:22:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:22,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:22:22,043 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:22:22,043 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:22:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 00:22:22,043 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:22:22,043 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:22:22,043 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:22:22,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-01-28 00:22:22,145 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:22:22,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1282 places, 1414 transitions, 3400 flow [2023-01-28 00:22:22,869 INFO L130 PetriNetUnfolder]: 199/1676 cut-off events. [2023-01-28 00:22:22,870 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-01-28 00:22:22,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1676 events. 199/1676 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7881 event pairs, 0 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 1883. Up to 46 conditions per place. [2023-01-28 00:22:22,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 1282 places, 1414 transitions, 3400 flow [2023-01-28 00:22:22,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1282 places, 1414 transitions, 3400 flow [2023-01-28 00:22:22,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:22:22,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1282 places, 1414 transitions, 3400 flow [2023-01-28 00:22:22,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1282 places, 1414 transitions, 3400 flow [2023-01-28 00:22:22,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1282 places, 1414 transitions, 3400 flow [2023-01-28 00:22:23,616 INFO L130 PetriNetUnfolder]: 199/1676 cut-off events. [2023-01-28 00:22:23,616 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-01-28 00:22:23,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1676 events. 199/1676 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 7881 event pairs, 0 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 1883. Up to 46 conditions per place. [2023-01-28 00:22:24,059 INFO L119 LiptonReduction]: Number of co-enabled transitions 1840036 [2023-01-28 00:22:34,323 INFO L134 LiptonReduction]: Checked pairs total: 3933991 [2023-01-28 00:22:34,323 INFO L136 LiptonReduction]: Total number of compositions: 1117 [2023-01-28 00:22:34,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:22:34,325 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:22:34,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:22:34,434 INFO L130 PetriNetUnfolder]: 90/617 cut-off events. [2023-01-28 00:22:34,435 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-01-28 00:22:34,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:22:34,435 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:22:34,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:22:34,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:22:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1604119119, now seen corresponding path program 1 times [2023-01-28 00:22:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:22:34,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125866247] [2023-01-28 00:22:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:22:34,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:22:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:34,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:22:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:34,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:22:34,496 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:22:34,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:22:34,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-28 00:22:34,496 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:22:34,496 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:22:34,497 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:22:34,497 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-01-28 00:22:34,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:22:34,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1339 places, 1477 transitions, 3575 flow [2023-01-28 00:22:35,500 INFO L130 PetriNetUnfolder]: 208/1751 cut-off events. [2023-01-28 00:22:35,500 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-01-28 00:22:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1751 events. 208/1751 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8236 event pairs, 0 based on Foata normal form. 0/1496 useless extension candidates. Maximal degree in co-relation 1983. Up to 48 conditions per place. [2023-01-28 00:22:35,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 1339 places, 1477 transitions, 3575 flow [2023-01-28 00:22:35,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1339 places, 1477 transitions, 3575 flow [2023-01-28 00:22:35,641 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:22:35,642 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1339 places, 1477 transitions, 3575 flow [2023-01-28 00:22:35,642 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1339 places, 1477 transitions, 3575 flow [2023-01-28 00:22:35,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1339 places, 1477 transitions, 3575 flow [2023-01-28 00:22:36,361 INFO L130 PetriNetUnfolder]: 208/1751 cut-off events. [2023-01-28 00:22:36,361 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-01-28 00:22:36,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1751 events. 208/1751 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8236 event pairs, 0 based on Foata normal form. 0/1496 useless extension candidates. Maximal degree in co-relation 1983. Up to 48 conditions per place. [2023-01-28 00:22:36,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 2013512 [2023-01-28 00:22:48,167 INFO L134 LiptonReduction]: Checked pairs total: 4273711 [2023-01-28 00:22:48,168 INFO L136 LiptonReduction]: Total number of compositions: 1183 [2023-01-28 00:22:48,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:22:48,169 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:22:48,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:22:48,290 INFO L130 PetriNetUnfolder]: 100/657 cut-off events. [2023-01-28 00:22:48,290 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-01-28 00:22:48,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:22:48,291 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:22:48,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:22:48,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:22:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash 488388468, now seen corresponding path program 1 times [2023-01-28 00:22:48,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:22:48,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219076816] [2023-01-28 00:22:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:22:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:22:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:48,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:22:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:22:48,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:22:48,353 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:22:48,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:22:48,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-01-28 00:22:48,353 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:22:48,353 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:22:48,353 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:22:48,354 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-01-28 00:22:48,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:22:48,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1396 places, 1540 transitions, 3752 flow [2023-01-28 00:22:49,282 INFO L130 PetriNetUnfolder]: 217/1826 cut-off events. [2023-01-28 00:22:49,283 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-01-28 00:22:49,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1826 events. 217/1826 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8543 event pairs, 0 based on Foata normal form. 0/1560 useless extension candidates. Maximal degree in co-relation 2084. Up to 50 conditions per place. [2023-01-28 00:22:49,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 1396 places, 1540 transitions, 3752 flow [2023-01-28 00:22:49,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1396 places, 1540 transitions, 3752 flow [2023-01-28 00:22:49,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:22:49,433 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1396 places, 1540 transitions, 3752 flow [2023-01-28 00:22:49,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1396 places, 1540 transitions, 3752 flow [2023-01-28 00:22:49,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1396 places, 1540 transitions, 3752 flow [2023-01-28 00:22:50,322 INFO L130 PetriNetUnfolder]: 217/1826 cut-off events. [2023-01-28 00:22:50,322 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-01-28 00:22:50,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1826 events. 217/1826 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8543 event pairs, 0 based on Foata normal form. 0/1560 useless extension candidates. Maximal degree in co-relation 2084. Up to 50 conditions per place. [2023-01-28 00:22:50,684 INFO L119 LiptonReduction]: Number of co-enabled transitions 2194800 [2023-01-28 00:23:02,225 INFO L134 LiptonReduction]: Checked pairs total: 4750852 [2023-01-28 00:23:02,225 INFO L136 LiptonReduction]: Total number of compositions: 1227 [2023-01-28 00:23:02,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:23:02,227 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:23:02,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:23:02,399 INFO L130 PetriNetUnfolder]: 106/688 cut-off events. [2023-01-28 00:23:02,400 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-01-28 00:23:02,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:23:02,400 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:23:02,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:23:02,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:23:02,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1429520027, now seen corresponding path program 1 times [2023-01-28 00:23:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:23:02,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100050188] [2023-01-28 00:23:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:23:02,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:23:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:02,440 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:23:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:02,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:23:02,476 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:23:02,476 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:23:02,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-01-28 00:23:02,476 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:23:02,476 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:23:02,476 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:23:02,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-01-28 00:23:02,604 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:23:02,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1453 places, 1603 transitions, 3931 flow [2023-01-28 00:23:03,573 INFO L130 PetriNetUnfolder]: 226/1901 cut-off events. [2023-01-28 00:23:03,573 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-01-28 00:23:03,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1901 events. 226/1901 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8975 event pairs, 0 based on Foata normal form. 0/1624 useless extension candidates. Maximal degree in co-relation 2186. Up to 52 conditions per place. [2023-01-28 00:23:03,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 1453 places, 1603 transitions, 3931 flow [2023-01-28 00:23:03,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1453 places, 1603 transitions, 3931 flow [2023-01-28 00:23:03,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:23:03,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1453 places, 1603 transitions, 3931 flow [2023-01-28 00:23:03,751 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1453 places, 1603 transitions, 3931 flow [2023-01-28 00:23:03,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1453 places, 1603 transitions, 3931 flow [2023-01-28 00:23:04,694 INFO L130 PetriNetUnfolder]: 226/1901 cut-off events. [2023-01-28 00:23:04,694 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-01-28 00:23:04,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1901 events. 226/1901 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 8975 event pairs, 0 based on Foata normal form. 0/1624 useless extension candidates. Maximal degree in co-relation 2186. Up to 52 conditions per place. [2023-01-28 00:23:05,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 2383900 [2023-01-28 00:23:17,141 INFO L134 LiptonReduction]: Checked pairs total: 5066667 [2023-01-28 00:23:17,141 INFO L136 LiptonReduction]: Total number of compositions: 1277 [2023-01-28 00:23:17,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:23:17,142 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:23:17,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:23:17,287 INFO L130 PetriNetUnfolder]: 103/705 cut-off events. [2023-01-28 00:23:17,287 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-01-28 00:23:17,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:23:17,287 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:23:17,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:23:17,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:23:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1833648452, now seen corresponding path program 1 times [2023-01-28 00:23:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:23:17,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834331262] [2023-01-28 00:23:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:23:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:23:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:17,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:23:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:17,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:23:17,353 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:23:17,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:23:17,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-01-28 00:23:17,353 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:23:17,354 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:23:17,354 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:23:17,354 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-01-28 00:23:17,476 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:23:17,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1510 places, 1666 transitions, 4112 flow [2023-01-28 00:23:18,533 INFO L130 PetriNetUnfolder]: 235/1976 cut-off events. [2023-01-28 00:23:18,533 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-01-28 00:23:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1976 events. 235/1976 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 9363 event pairs, 0 based on Foata normal form. 0/1688 useless extension candidates. Maximal degree in co-relation 2289. Up to 54 conditions per place. [2023-01-28 00:23:18,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 1510 places, 1666 transitions, 4112 flow [2023-01-28 00:23:18,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1510 places, 1666 transitions, 4112 flow [2023-01-28 00:23:18,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:23:18,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1510 places, 1666 transitions, 4112 flow [2023-01-28 00:23:18,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1510 places, 1666 transitions, 4112 flow [2023-01-28 00:23:18,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1510 places, 1666 transitions, 4112 flow [2023-01-28 00:23:19,864 INFO L130 PetriNetUnfolder]: 235/1976 cut-off events. [2023-01-28 00:23:19,864 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-01-28 00:23:19,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1976 events. 235/1976 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 9363 event pairs, 0 based on Foata normal form. 0/1688 useless extension candidates. Maximal degree in co-relation 2289. Up to 54 conditions per place. [2023-01-28 00:23:20,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 2580812 [2023-01-28 00:23:32,923 INFO L134 LiptonReduction]: Checked pairs total: 5625808 [2023-01-28 00:23:32,924 INFO L136 LiptonReduction]: Total number of compositions: 1319 [2023-01-28 00:23:32,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:23:32,925 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:23:32,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:23:33,141 INFO L130 PetriNetUnfolder]: 114/753 cut-off events. [2023-01-28 00:23:33,141 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-01-28 00:23:33,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:23:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:23:33,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:23:33,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:23:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1230829260, now seen corresponding path program 1 times [2023-01-28 00:23:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:23:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864058177] [2023-01-28 00:23:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:23:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:23:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:33,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:23:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:33,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:23:33,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:23:33,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:23:33,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-01-28 00:23:33,216 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:23:33,216 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:23:33,216 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:23:33,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-01-28 00:23:33,350 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:23:33,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1567 places, 1729 transitions, 4295 flow [2023-01-28 00:23:34,486 INFO L130 PetriNetUnfolder]: 244/2051 cut-off events. [2023-01-28 00:23:34,486 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-01-28 00:23:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 2051 events. 244/2051 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9772 event pairs, 0 based on Foata normal form. 0/1752 useless extension candidates. Maximal degree in co-relation 2393. Up to 56 conditions per place. [2023-01-28 00:23:34,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 1567 places, 1729 transitions, 4295 flow [2023-01-28 00:23:34,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1567 places, 1729 transitions, 4295 flow [2023-01-28 00:23:34,697 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:23:34,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1567 places, 1729 transitions, 4295 flow [2023-01-28 00:23:34,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1567 places, 1729 transitions, 4295 flow [2023-01-28 00:23:34,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1567 places, 1729 transitions, 4295 flow [2023-01-28 00:23:35,800 INFO L130 PetriNetUnfolder]: 244/2051 cut-off events. [2023-01-28 00:23:35,800 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-01-28 00:23:35,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 2051 events. 244/2051 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9772 event pairs, 0 based on Foata normal form. 0/1752 useless extension candidates. Maximal degree in co-relation 2393. Up to 56 conditions per place. [2023-01-28 00:23:36,349 INFO L119 LiptonReduction]: Number of co-enabled transitions 2785536 [2023-01-28 00:23:49,804 INFO L134 LiptonReduction]: Checked pairs total: 6047258 [2023-01-28 00:23:49,804 INFO L136 LiptonReduction]: Total number of compositions: 1376 [2023-01-28 00:23:49,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:23:49,806 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:23:49,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:23:49,975 INFO L130 PetriNetUnfolder]: 118/777 cut-off events. [2023-01-28 00:23:49,975 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-01-28 00:23:49,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:23:49,976 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:23:49,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:23:49,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:23:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash 299161815, now seen corresponding path program 1 times [2023-01-28 00:23:49,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:23:49,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583313777] [2023-01-28 00:23:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:23:49,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:23:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:50,023 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:23:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:23:50,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:23:50,058 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:23:50,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:23:50,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-01-28 00:23:50,058 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:23:50,058 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:23:50,058 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:23:50,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-01-28 00:23:50,193 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:23:50,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1624 places, 1792 transitions, 4480 flow [2023-01-28 00:23:51,559 INFO L130 PetriNetUnfolder]: 253/2126 cut-off events. [2023-01-28 00:23:51,559 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-01-28 00:23:51,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 2126 events. 253/2126 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10053 event pairs, 0 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 2498. Up to 58 conditions per place. [2023-01-28 00:23:51,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 1624 places, 1792 transitions, 4480 flow [2023-01-28 00:23:51,690 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1624 places, 1792 transitions, 4480 flow [2023-01-28 00:23:51,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:23:51,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1624 places, 1792 transitions, 4480 flow [2023-01-28 00:23:51,695 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1624 places, 1792 transitions, 4480 flow [2023-01-28 00:23:51,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1624 places, 1792 transitions, 4480 flow [2023-01-28 00:23:52,901 INFO L130 PetriNetUnfolder]: 253/2126 cut-off events. [2023-01-28 00:23:52,902 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-01-28 00:23:53,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 2126 events. 253/2126 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10053 event pairs, 0 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 2498. Up to 58 conditions per place. [2023-01-28 00:23:53,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 2998072 [2023-01-28 00:24:08,145 INFO L134 LiptonReduction]: Checked pairs total: 6551977 [2023-01-28 00:24:08,145 INFO L136 LiptonReduction]: Total number of compositions: 1431 [2023-01-28 00:24:08,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:24:08,147 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:24:08,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:24:08,329 INFO L130 PetriNetUnfolder]: 122/807 cut-off events. [2023-01-28 00:24:08,329 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-01-28 00:24:08,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:24:08,329 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:24:08,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:24:08,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:24:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1332006675, now seen corresponding path program 1 times [2023-01-28 00:24:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:24:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459751270] [2023-01-28 00:24:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:24:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:24:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:24:08,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:24:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:24:08,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:24:08,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:24:08,456 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:24:08,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-01-28 00:24:08,456 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:24:08,456 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:24:08,456 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:24:08,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-01-28 00:24:08,587 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:24:08,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1681 places, 1855 transitions, 4667 flow [2023-01-28 00:24:10,116 INFO L130 PetriNetUnfolder]: 262/2201 cut-off events. [2023-01-28 00:24:10,116 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-01-28 00:24:10,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 2201 events. 262/2201 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10438 event pairs, 0 based on Foata normal form. 0/1880 useless extension candidates. Maximal degree in co-relation 2604. Up to 60 conditions per place. [2023-01-28 00:24:10,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 1681 places, 1855 transitions, 4667 flow [2023-01-28 00:24:10,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1681 places, 1855 transitions, 4667 flow [2023-01-28 00:24:10,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:24:10,255 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1681 places, 1855 transitions, 4667 flow [2023-01-28 00:24:10,255 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1681 places, 1855 transitions, 4667 flow [2023-01-28 00:24:10,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1681 places, 1855 transitions, 4667 flow [2023-01-28 00:24:11,543 INFO L130 PetriNetUnfolder]: 262/2201 cut-off events. [2023-01-28 00:24:11,544 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-01-28 00:24:11,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2724 conditions, 2201 events. 262/2201 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10438 event pairs, 0 based on Foata normal form. 0/1880 useless extension candidates. Maximal degree in co-relation 2604. Up to 60 conditions per place. [2023-01-28 00:24:12,329 INFO L119 LiptonReduction]: Number of co-enabled transitions 3218420 [2023-01-28 00:24:27,123 INFO L134 LiptonReduction]: Checked pairs total: 6841439 [2023-01-28 00:24:27,123 INFO L136 LiptonReduction]: Total number of compositions: 1469 [2023-01-28 00:24:27,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:24:27,125 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:24:27,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:24:27,317 INFO L130 PetriNetUnfolder]: 123/827 cut-off events. [2023-01-28 00:24:27,317 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-01-28 00:24:27,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:24:27,317 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:24:27,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:24:27,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:24:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1437393751, now seen corresponding path program 1 times [2023-01-28 00:24:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:24:27,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678322240] [2023-01-28 00:24:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:24:27,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:24:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:24:27,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:24:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:24:27,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:24:27,404 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:24:27,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:24:27,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-01-28 00:24:27,405 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:24:27,405 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:24:27,405 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:24:27,405 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-01-28 00:24:27,547 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:24:27,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1738 places, 1918 transitions, 4856 flow [2023-01-28 00:24:29,039 INFO L130 PetriNetUnfolder]: 271/2276 cut-off events. [2023-01-28 00:24:29,039 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-01-28 00:24:29,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 2276 events. 271/2276 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10819 event pairs, 0 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 2711. Up to 62 conditions per place. [2023-01-28 00:24:29,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 1738 places, 1918 transitions, 4856 flow [2023-01-28 00:24:29,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1738 places, 1918 transitions, 4856 flow [2023-01-28 00:24:29,212 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:24:29,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1738 places, 1918 transitions, 4856 flow [2023-01-28 00:24:29,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1738 places, 1918 transitions, 4856 flow [2023-01-28 00:24:29,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1738 places, 1918 transitions, 4856 flow [2023-01-28 00:24:30,820 INFO L130 PetriNetUnfolder]: 271/2276 cut-off events. [2023-01-28 00:24:30,821 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-01-28 00:24:30,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 2276 events. 271/2276 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 10819 event pairs, 0 based on Foata normal form. 0/1944 useless extension candidates. Maximal degree in co-relation 2711. Up to 62 conditions per place. [2023-01-28 00:24:31,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 3446580 [2023-01-28 00:24:46,713 INFO L134 LiptonReduction]: Checked pairs total: 7413504 [2023-01-28 00:24:46,713 INFO L136 LiptonReduction]: Total number of compositions: 1505 [2023-01-28 00:24:46,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:24:46,715 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:24:46,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:24:46,924 INFO L130 PetriNetUnfolder]: 126/857 cut-off events. [2023-01-28 00:24:46,924 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-01-28 00:24:46,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:24:46,925 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:24:46,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:24:46,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:24:46,925 INFO L85 PathProgramCache]: Analyzing trace with hash -797141172, now seen corresponding path program 1 times [2023-01-28 00:24:46,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:24:46,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245654318] [2023-01-28 00:24:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:24:46,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:24:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:24:46,992 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:24:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:24:47,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:24:47,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:24:47,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:24:47,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-01-28 00:24:47,036 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:24:47,037 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:24:47,037 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:24:47,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-01-28 00:24:47,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:24:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1795 places, 1981 transitions, 5047 flow [2023-01-28 00:24:48,736 INFO L130 PetriNetUnfolder]: 280/2351 cut-off events. [2023-01-28 00:24:48,736 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-01-28 00:24:48,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 2351 events. 280/2351 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11119 event pairs, 0 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 2819. Up to 64 conditions per place. [2023-01-28 00:24:48,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 1795 places, 1981 transitions, 5047 flow [2023-01-28 00:24:49,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1795 places, 1981 transitions, 5047 flow [2023-01-28 00:24:49,029 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:24:49,029 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1795 places, 1981 transitions, 5047 flow [2023-01-28 00:24:49,029 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1795 places, 1981 transitions, 5047 flow [2023-01-28 00:24:49,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1795 places, 1981 transitions, 5047 flow [2023-01-28 00:24:50,700 INFO L130 PetriNetUnfolder]: 280/2351 cut-off events. [2023-01-28 00:24:50,701 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-01-28 00:24:50,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2941 conditions, 2351 events. 280/2351 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11119 event pairs, 0 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 2819. Up to 64 conditions per place. [2023-01-28 00:24:51,538 INFO L119 LiptonReduction]: Number of co-enabled transitions 3682552 [2023-01-28 00:25:08,076 INFO L134 LiptonReduction]: Checked pairs total: 7882226 [2023-01-28 00:25:08,076 INFO L136 LiptonReduction]: Total number of compositions: 1563 [2023-01-28 00:25:08,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:25:08,078 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:25:08,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:25:08,351 INFO L130 PetriNetUnfolder]: 134/894 cut-off events. [2023-01-28 00:25:08,351 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-01-28 00:25:08,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:25:08,352 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:25:08,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:25:08,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:25:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash 291964691, now seen corresponding path program 1 times [2023-01-28 00:25:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:25:08,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735370396] [2023-01-28 00:25:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:25:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:25:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:25:08,398 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:25:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:25:08,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:25:08,440 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:25:08,440 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:25:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-01-28 00:25:08,441 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:25:08,441 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:25:08,441 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:25:08,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-01-28 00:25:08,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:25:08,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1852 places, 2044 transitions, 5240 flow [2023-01-28 00:25:10,316 INFO L130 PetriNetUnfolder]: 289/2426 cut-off events. [2023-01-28 00:25:10,316 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-01-28 00:25:10,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 2426 events. 289/2426 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11516 event pairs, 0 based on Foata normal form. 0/2072 useless extension candidates. Maximal degree in co-relation 2928. Up to 66 conditions per place. [2023-01-28 00:25:10,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 1852 places, 2044 transitions, 5240 flow [2023-01-28 00:25:10,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1852 places, 2044 transitions, 5240 flow [2023-01-28 00:25:10,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:25:10,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1852 places, 2044 transitions, 5240 flow [2023-01-28 00:25:10,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1852 places, 2044 transitions, 5240 flow [2023-01-28 00:25:10,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1852 places, 2044 transitions, 5240 flow [2023-01-28 00:25:12,061 INFO L130 PetriNetUnfolder]: 289/2426 cut-off events. [2023-01-28 00:25:12,062 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-01-28 00:25:12,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 2426 events. 289/2426 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11516 event pairs, 0 based on Foata normal form. 0/2072 useless extension candidates. Maximal degree in co-relation 2928. Up to 66 conditions per place. [2023-01-28 00:25:13,008 INFO L119 LiptonReduction]: Number of co-enabled transitions 3926336 [2023-01-28 00:25:30,103 INFO L134 LiptonReduction]: Checked pairs total: 8328060 [2023-01-28 00:25:30,104 INFO L136 LiptonReduction]: Total number of compositions: 1616 [2023-01-28 00:25:30,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:25:30,105 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:25:30,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:25:30,351 INFO L130 PetriNetUnfolder]: 140/926 cut-off events. [2023-01-28 00:25:30,351 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-01-28 00:25:30,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:25:30,351 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:25:30,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:25:30,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:25:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash 639229301, now seen corresponding path program 1 times [2023-01-28 00:25:30,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:25:30,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612992260] [2023-01-28 00:25:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:25:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:25:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:25:30,400 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:25:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:25:30,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:25:30,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:25:30,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:25:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-01-28 00:25:30,443 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:25:30,443 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:25:30,443 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:25:30,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-01-28 00:25:30,589 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:25:30,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1909 places, 2107 transitions, 5435 flow [2023-01-28 00:25:32,344 INFO L130 PetriNetUnfolder]: 298/2501 cut-off events. [2023-01-28 00:25:32,344 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-01-28 00:25:32,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 2501 events. 298/2501 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11896 event pairs, 0 based on Foata normal form. 0/2136 useless extension candidates. Maximal degree in co-relation 3038. Up to 68 conditions per place. [2023-01-28 00:25:32,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 1909 places, 2107 transitions, 5435 flow [2023-01-28 00:25:32,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1909 places, 2107 transitions, 5435 flow [2023-01-28 00:25:32,564 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:25:32,564 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1909 places, 2107 transitions, 5435 flow [2023-01-28 00:25:32,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1909 places, 2107 transitions, 5435 flow [2023-01-28 00:25:32,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1909 places, 2107 transitions, 5435 flow [2023-01-28 00:25:34,436 INFO L130 PetriNetUnfolder]: 298/2501 cut-off events. [2023-01-28 00:25:34,437 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-01-28 00:25:34,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 2501 events. 298/2501 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 11896 event pairs, 0 based on Foata normal form. 0/2136 useless extension candidates. Maximal degree in co-relation 3038. Up to 68 conditions per place. [2023-01-28 00:25:35,205 INFO L119 LiptonReduction]: Number of co-enabled transitions 4177932 [2023-01-28 00:25:52,478 INFO L134 LiptonReduction]: Checked pairs total: 8834959 [2023-01-28 00:25:52,478 INFO L136 LiptonReduction]: Total number of compositions: 1670 [2023-01-28 00:25:52,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:25:52,479 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:25:52,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:25:52,747 INFO L130 PetriNetUnfolder]: 144/953 cut-off events. [2023-01-28 00:25:52,747 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-01-28 00:25:52,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:25:52,747 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:25:52,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:25:52,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:25:52,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1609482391, now seen corresponding path program 1 times [2023-01-28 00:25:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:25:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226755735] [2023-01-28 00:25:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:25:52,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:25:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:25:52,803 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:25:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:25:52,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:25:52,851 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:25:52,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:25:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-01-28 00:25:52,851 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:25:52,852 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:25:52,852 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:25:52,852 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-01-28 00:25:53,014 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:25:53,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1966 places, 2170 transitions, 5632 flow [2023-01-28 00:25:54,894 INFO L130 PetriNetUnfolder]: 307/2576 cut-off events. [2023-01-28 00:25:54,895 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-01-28 00:25:55,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 2576 events. 307/2576 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12301 event pairs, 0 based on Foata normal form. 0/2200 useless extension candidates. Maximal degree in co-relation 3149. Up to 70 conditions per place. [2023-01-28 00:25:55,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 1966 places, 2170 transitions, 5632 flow [2023-01-28 00:25:55,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1966 places, 2170 transitions, 5632 flow [2023-01-28 00:25:55,113 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:25:55,113 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1966 places, 2170 transitions, 5632 flow [2023-01-28 00:25:55,113 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1966 places, 2170 transitions, 5632 flow [2023-01-28 00:25:55,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1966 places, 2170 transitions, 5632 flow [2023-01-28 00:25:57,091 INFO L130 PetriNetUnfolder]: 307/2576 cut-off events. [2023-01-28 00:25:57,092 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-01-28 00:25:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3274 conditions, 2576 events. 307/2576 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12301 event pairs, 0 based on Foata normal form. 0/2200 useless extension candidates. Maximal degree in co-relation 3149. Up to 70 conditions per place. [2023-01-28 00:25:58,094 INFO L119 LiptonReduction]: Number of co-enabled transitions 4437340 [2023-01-28 00:26:16,961 INFO L134 LiptonReduction]: Checked pairs total: 9480268 [2023-01-28 00:26:16,961 INFO L136 LiptonReduction]: Total number of compositions: 1724 [2023-01-28 00:26:16,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:26:16,963 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:26:16,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:26:17,250 INFO L130 PetriNetUnfolder]: 146/976 cut-off events. [2023-01-28 00:26:17,250 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-01-28 00:26:17,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:26:17,251 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:26:17,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:26:17,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:26:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1413739277, now seen corresponding path program 1 times [2023-01-28 00:26:17,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:26:17,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212098350] [2023-01-28 00:26:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:26:17,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:26:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:26:17,307 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:26:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:26:17,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:26:17,359 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:26:17,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:26:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-01-28 00:26:17,359 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:26:17,360 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:26:17,360 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:26:17,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-01-28 00:26:17,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:26:17,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2023 places, 2233 transitions, 5831 flow [2023-01-28 00:26:19,680 INFO L130 PetriNetUnfolder]: 316/2651 cut-off events. [2023-01-28 00:26:19,680 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-01-28 00:26:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 2651 events. 316/2651 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12670 event pairs, 0 based on Foata normal form. 0/2264 useless extension candidates. Maximal degree in co-relation 3261. Up to 72 conditions per place. [2023-01-28 00:26:19,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 2023 places, 2233 transitions, 5831 flow [2023-01-28 00:26:19,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2023 places, 2233 transitions, 5831 flow [2023-01-28 00:26:19,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:26:19,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2023 places, 2233 transitions, 5831 flow [2023-01-28 00:26:19,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2023 places, 2233 transitions, 5831 flow [2023-01-28 00:26:19,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2023 places, 2233 transitions, 5831 flow [2023-01-28 00:26:21,927 INFO L130 PetriNetUnfolder]: 316/2651 cut-off events. [2023-01-28 00:26:21,927 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-01-28 00:26:22,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 2651 events. 316/2651 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12670 event pairs, 0 based on Foata normal form. 0/2264 useless extension candidates. Maximal degree in co-relation 3261. Up to 72 conditions per place. [2023-01-28 00:26:22,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 4704560 [2023-01-28 00:26:43,019 INFO L134 LiptonReduction]: Checked pairs total: 10199493 [2023-01-28 00:26:43,020 INFO L136 LiptonReduction]: Total number of compositions: 1769 [2023-01-28 00:26:43,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:26:43,021 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:26:43,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:26:43,317 INFO L130 PetriNetUnfolder]: 151/1006 cut-off events. [2023-01-28 00:26:43,317 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-01-28 00:26:43,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:26:43,317 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:26:43,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:26:43,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:26:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 836937154, now seen corresponding path program 1 times [2023-01-28 00:26:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:26:43,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126430384] [2023-01-28 00:26:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:26:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:26:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:26:43,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:26:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:26:43,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:26:43,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:26:43,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:26:43,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-01-28 00:26:43,429 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:26:43,429 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:26:43,429 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:26:43,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-01-28 00:26:43,609 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:26:43,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2080 places, 2296 transitions, 6032 flow [2023-01-28 00:26:45,869 INFO L130 PetriNetUnfolder]: 325/2726 cut-off events. [2023-01-28 00:26:45,869 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-01-28 00:26:46,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 2726 events. 325/2726 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12996 event pairs, 0 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 3374. Up to 74 conditions per place. [2023-01-28 00:26:46,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 2080 places, 2296 transitions, 6032 flow [2023-01-28 00:26:46,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2080 places, 2296 transitions, 6032 flow [2023-01-28 00:26:46,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:26:46,090 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2080 places, 2296 transitions, 6032 flow [2023-01-28 00:26:46,090 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2080 places, 2296 transitions, 6032 flow [2023-01-28 00:26:46,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2080 places, 2296 transitions, 6032 flow [2023-01-28 00:26:48,149 INFO L130 PetriNetUnfolder]: 325/2726 cut-off events. [2023-01-28 00:26:48,149 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-01-28 00:26:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 2726 events. 325/2726 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 12996 event pairs, 0 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 3374. Up to 74 conditions per place. [2023-01-28 00:26:49,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 4979592 [2023-01-28 00:27:09,889 INFO L134 LiptonReduction]: Checked pairs total: 10597483 [2023-01-28 00:27:09,889 INFO L136 LiptonReduction]: Total number of compositions: 1803 [2023-01-28 00:27:09,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:27:09,891 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:27:09,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:27:10,215 INFO L130 PetriNetUnfolder]: 154/1042 cut-off events. [2023-01-28 00:27:10,215 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-01-28 00:27:10,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:27:10,216 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:27:10,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:27:10,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:27:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash -563754587, now seen corresponding path program 1 times [2023-01-28 00:27:10,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:27:10,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369701990] [2023-01-28 00:27:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:27:10,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:27:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:27:10,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:27:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:27:10,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:27:10,343 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:27:10,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:27:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-01-28 00:27:10,343 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:27:10,343 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:27:10,343 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:27:10,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-01-28 00:27:10,506 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:27:10,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2137 places, 2359 transitions, 6235 flow [2023-01-28 00:27:12,724 INFO L130 PetriNetUnfolder]: 334/2801 cut-off events. [2023-01-28 00:27:12,725 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-01-28 00:27:12,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 2801 events. 334/2801 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13406 event pairs, 0 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 3488. Up to 76 conditions per place. [2023-01-28 00:27:12,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 2137 places, 2359 transitions, 6235 flow [2023-01-28 00:27:12,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2137 places, 2359 transitions, 6235 flow [2023-01-28 00:27:12,956 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:27:12,956 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2137 places, 2359 transitions, 6235 flow [2023-01-28 00:27:12,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2137 places, 2359 transitions, 6235 flow [2023-01-28 00:27:12,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2137 places, 2359 transitions, 6235 flow [2023-01-28 00:27:15,125 INFO L130 PetriNetUnfolder]: 334/2801 cut-off events. [2023-01-28 00:27:15,125 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-01-28 00:27:15,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 2801 events. 334/2801 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13406 event pairs, 0 based on Foata normal form. 0/2392 useless extension candidates. Maximal degree in co-relation 3488. Up to 76 conditions per place. [2023-01-28 00:27:16,280 INFO L119 LiptonReduction]: Number of co-enabled transitions 5262436 [2023-01-28 00:27:38,441 INFO L134 LiptonReduction]: Checked pairs total: 11293475 [2023-01-28 00:27:38,441 INFO L136 LiptonReduction]: Total number of compositions: 1881 [2023-01-28 00:27:38,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:27:38,443 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:27:38,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:27:38,788 INFO L130 PetriNetUnfolder]: 163/1064 cut-off events. [2023-01-28 00:27:38,788 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-01-28 00:27:38,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:27:38,788 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:27:38,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:27:38,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:27:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2126582502, now seen corresponding path program 1 times [2023-01-28 00:27:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:27:38,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059591291] [2023-01-28 00:27:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:27:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:27:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:27:38,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:27:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:27:38,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:27:38,939 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:27:38,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:27:38,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-01-28 00:27:38,940 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:27:38,940 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:27:38,940 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:27:38,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-01-28 00:27:39,107 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:27:39,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2194 places, 2422 transitions, 6440 flow [2023-01-28 00:27:41,507 INFO L130 PetriNetUnfolder]: 343/2876 cut-off events. [2023-01-28 00:27:41,507 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-01-28 00:27:41,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 2876 events. 343/2876 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13743 event pairs, 0 based on Foata normal form. 0/2456 useless extension candidates. Maximal degree in co-relation 3603. Up to 78 conditions per place. [2023-01-28 00:27:41,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 2194 places, 2422 transitions, 6440 flow [2023-01-28 00:27:41,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2194 places, 2422 transitions, 6440 flow [2023-01-28 00:27:41,735 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:27:41,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2194 places, 2422 transitions, 6440 flow [2023-01-28 00:27:41,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2194 places, 2422 transitions, 6440 flow [2023-01-28 00:27:41,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2194 places, 2422 transitions, 6440 flow [2023-01-28 00:27:44,025 INFO L130 PetriNetUnfolder]: 343/2876 cut-off events. [2023-01-28 00:27:44,025 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-01-28 00:27:44,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 2876 events. 343/2876 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13743 event pairs, 0 based on Foata normal form. 0/2456 useless extension candidates. Maximal degree in co-relation 3603. Up to 78 conditions per place. [2023-01-28 00:27:45,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 5553092 [2023-01-28 00:28:07,292 INFO L134 LiptonReduction]: Checked pairs total: 12006321 [2023-01-28 00:28:07,292 INFO L136 LiptonReduction]: Total number of compositions: 1909 [2023-01-28 00:28:07,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:28:07,294 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:28:07,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:28:07,719 INFO L130 PetriNetUnfolder]: 165/1108 cut-off events. [2023-01-28 00:28:07,719 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-01-28 00:28:07,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:28:07,720 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:28:07,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:28:07,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:28:07,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1334897437, now seen corresponding path program 1 times [2023-01-28 00:28:07,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:28:07,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261985096] [2023-01-28 00:28:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:28:07,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:28:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:28:07,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:28:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:28:07,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:28:07,846 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:28:07,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:28:07,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-01-28 00:28:07,847 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:28:07,847 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:28:07,847 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:28:07,847 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-01-28 00:28:08,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:28:08,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2251 places, 2485 transitions, 6647 flow [2023-01-28 00:28:10,511 INFO L130 PetriNetUnfolder]: 352/2951 cut-off events. [2023-01-28 00:28:10,511 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-01-28 00:28:10,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 2951 events. 352/2951 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14144 event pairs, 0 based on Foata normal form. 0/2520 useless extension candidates. Maximal degree in co-relation 3719. Up to 80 conditions per place. [2023-01-28 00:28:10,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 2251 places, 2485 transitions, 6647 flow [2023-01-28 00:28:10,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2251 places, 2485 transitions, 6647 flow [2023-01-28 00:28:10,759 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:28:10,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2251 places, 2485 transitions, 6647 flow [2023-01-28 00:28:10,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2251 places, 2485 transitions, 6647 flow [2023-01-28 00:28:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2251 places, 2485 transitions, 6647 flow [2023-01-28 00:28:13,277 INFO L130 PetriNetUnfolder]: 352/2951 cut-off events. [2023-01-28 00:28:13,277 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-01-28 00:28:13,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 2951 events. 352/2951 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14144 event pairs, 0 based on Foata normal form. 0/2520 useless extension candidates. Maximal degree in co-relation 3719. Up to 80 conditions per place. [2023-01-28 00:28:14,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 5851560 [2023-01-28 00:28:37,861 INFO L134 LiptonReduction]: Checked pairs total: 12510362 [2023-01-28 00:28:37,861 INFO L136 LiptonReduction]: Total number of compositions: 1947 [2023-01-28 00:28:37,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:28:37,863 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:28:37,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:28:38,257 INFO L130 PetriNetUnfolder]: 168/1130 cut-off events. [2023-01-28 00:28:38,257 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-01-28 00:28:38,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:28:38,258 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:28:38,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:28:38,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:28:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1078599162, now seen corresponding path program 1 times [2023-01-28 00:28:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:28:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386605978] [2023-01-28 00:28:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:28:38,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:28:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:28:38,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:28:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:28:38,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:28:38,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:28:38,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:28:38,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-01-28 00:28:38,439 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:28:38,439 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:28:38,440 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:28:38,440 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-01-28 00:28:38,631 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:28:38,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2308 places, 2548 transitions, 6856 flow [2023-01-28 00:28:41,386 INFO L130 PetriNetUnfolder]: 361/3026 cut-off events. [2023-01-28 00:28:41,386 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-01-28 00:28:41,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 3026 events. 361/3026 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14471 event pairs, 0 based on Foata normal form. 0/2584 useless extension candidates. Maximal degree in co-relation 3836. Up to 82 conditions per place. [2023-01-28 00:28:41,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 2308 places, 2548 transitions, 6856 flow [2023-01-28 00:28:41,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2308 places, 2548 transitions, 6856 flow [2023-01-28 00:28:41,642 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:28:41,642 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2308 places, 2548 transitions, 6856 flow [2023-01-28 00:28:41,642 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2308 places, 2548 transitions, 6856 flow [2023-01-28 00:28:41,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2308 places, 2548 transitions, 6856 flow [2023-01-28 00:28:44,370 INFO L130 PetriNetUnfolder]: 361/3026 cut-off events. [2023-01-28 00:28:44,370 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-01-28 00:28:44,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 3026 events. 361/3026 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14471 event pairs, 0 based on Foata normal form. 0/2584 useless extension candidates. Maximal degree in co-relation 3836. Up to 82 conditions per place. [2023-01-28 00:28:45,673 INFO L119 LiptonReduction]: Number of co-enabled transitions 6157840 [2023-01-28 00:29:09,048 INFO L134 LiptonReduction]: Checked pairs total: 13048176 [2023-01-28 00:29:09,048 INFO L136 LiptonReduction]: Total number of compositions: 2051 [2023-01-28 00:29:09,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:29:09,050 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:29:09,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:29:09,477 INFO L130 PetriNetUnfolder]: 179/1153 cut-off events. [2023-01-28 00:29:09,477 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-01-28 00:29:09,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:29:09,477 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:29:09,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:29:09,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:29:09,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1090438301, now seen corresponding path program 1 times [2023-01-28 00:29:09,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:29:09,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746590386] [2023-01-28 00:29:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:29:09,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:29:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:29:09,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:29:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:29:09,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:29:09,706 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:29:09,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:29:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-01-28 00:29:09,706 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:29:09,707 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:29:09,707 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:29:09,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-01-28 00:29:09,985 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:29:09,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2365 places, 2611 transitions, 7067 flow [2023-01-28 00:29:12,813 INFO L130 PetriNetUnfolder]: 370/3101 cut-off events. [2023-01-28 00:29:12,813 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-01-28 00:29:13,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 3101 events. 370/3101 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14872 event pairs, 0 based on Foata normal form. 0/2648 useless extension candidates. Maximal degree in co-relation 3954. Up to 84 conditions per place. [2023-01-28 00:29:13,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 2365 places, 2611 transitions, 7067 flow [2023-01-28 00:29:13,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2365 places, 2611 transitions, 7067 flow [2023-01-28 00:29:13,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:29:13,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2365 places, 2611 transitions, 7067 flow [2023-01-28 00:29:13,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2365 places, 2611 transitions, 7067 flow [2023-01-28 00:29:13,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2365 places, 2611 transitions, 7067 flow [2023-01-28 00:29:15,832 INFO L130 PetriNetUnfolder]: 370/3101 cut-off events. [2023-01-28 00:29:15,832 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-01-28 00:29:16,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 3101 events. 370/3101 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 14872 event pairs, 0 based on Foata normal form. 0/2648 useless extension candidates. Maximal degree in co-relation 3954. Up to 84 conditions per place. [2023-01-28 00:29:17,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 6471932 [2023-01-28 00:29:43,149 INFO L134 LiptonReduction]: Checked pairs total: 13928867 [2023-01-28 00:29:43,149 INFO L136 LiptonReduction]: Total number of compositions: 2060 [2023-01-28 00:29:43,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:29:43,151 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:29:43,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:29:43,713 INFO L130 PetriNetUnfolder]: 182/1198 cut-off events. [2023-01-28 00:29:43,713 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-01-28 00:29:43,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:29:43,713 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:29:43,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:29:43,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:29:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash -275774233, now seen corresponding path program 1 times [2023-01-28 00:29:43,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:29:43,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455840660] [2023-01-28 00:29:43,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:29:43,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:29:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:29:43,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:29:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:29:43,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:29:43,856 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:29:43,856 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:29:43,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-01-28 00:29:43,856 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:29:43,857 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:29:43,857 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:29:43,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-01-28 00:29:44,052 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:29:44,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2422 places, 2674 transitions, 7280 flow [2023-01-28 00:29:46,919 INFO L130 PetriNetUnfolder]: 379/3176 cut-off events. [2023-01-28 00:29:46,919 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-01-28 00:29:47,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 3176 events. 379/3176 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15265 event pairs, 0 based on Foata normal form. 0/2712 useless extension candidates. Maximal degree in co-relation 4073. Up to 86 conditions per place. [2023-01-28 00:29:47,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 2422 places, 2674 transitions, 7280 flow [2023-01-28 00:29:47,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2422 places, 2674 transitions, 7280 flow [2023-01-28 00:29:47,381 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:29:47,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2422 places, 2674 transitions, 7280 flow [2023-01-28 00:29:47,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2422 places, 2674 transitions, 7280 flow [2023-01-28 00:29:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2422 places, 2674 transitions, 7280 flow [2023-01-28 00:29:50,175 INFO L130 PetriNetUnfolder]: 379/3176 cut-off events. [2023-01-28 00:29:50,176 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-01-28 00:29:50,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 3176 events. 379/3176 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15265 event pairs, 0 based on Foata normal form. 0/2712 useless extension candidates. Maximal degree in co-relation 4073. Up to 86 conditions per place. [2023-01-28 00:29:51,799 INFO L119 LiptonReduction]: Number of co-enabled transitions 6793836 [2023-01-28 00:30:18,297 INFO L134 LiptonReduction]: Checked pairs total: 14291282 [2023-01-28 00:30:18,297 INFO L136 LiptonReduction]: Total number of compositions: 2108 [2023-01-28 00:30:18,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:30:18,299 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:30:18,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:30:18,788 INFO L130 PetriNetUnfolder]: 179/1207 cut-off events. [2023-01-28 00:30:18,788 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-01-28 00:30:18,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:30:18,788 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:30:18,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:30:18,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:30:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1189822175, now seen corresponding path program 1 times [2023-01-28 00:30:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:30:18,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009179953] [2023-01-28 00:30:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:30:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:30:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:30:18,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:30:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:30:18,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:30:18,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:30:18,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:30:18,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-01-28 00:30:18,943 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:30:18,944 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:30:18,944 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:30:18,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-01-28 00:30:19,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:30:19,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2479 places, 2737 transitions, 7495 flow [2023-01-28 00:30:22,303 INFO L130 PetriNetUnfolder]: 388/3251 cut-off events. [2023-01-28 00:30:22,303 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-01-28 00:30:22,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 3251 events. 388/3251 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15653 event pairs, 0 based on Foata normal form. 0/2776 useless extension candidates. Maximal degree in co-relation 4193. Up to 88 conditions per place. [2023-01-28 00:30:22,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 2479 places, 2737 transitions, 7495 flow [2023-01-28 00:30:22,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2479 places, 2737 transitions, 7495 flow [2023-01-28 00:30:22,620 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:30:22,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2479 places, 2737 transitions, 7495 flow [2023-01-28 00:30:22,620 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2479 places, 2737 transitions, 7495 flow [2023-01-28 00:30:22,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2479 places, 2737 transitions, 7495 flow [2023-01-28 00:30:25,719 INFO L130 PetriNetUnfolder]: 388/3251 cut-off events. [2023-01-28 00:30:25,719 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-01-28 00:30:25,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 3251 events. 388/3251 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15653 event pairs, 0 based on Foata normal form. 0/2776 useless extension candidates. Maximal degree in co-relation 4193. Up to 88 conditions per place. [2023-01-28 00:30:27,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 7123552 [2023-01-28 00:30:53,925 INFO L134 LiptonReduction]: Checked pairs total: 15226044 [2023-01-28 00:30:53,926 INFO L136 LiptonReduction]: Total number of compositions: 2178 [2023-01-28 00:30:53,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:30:53,927 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:30:53,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:30:54,512 INFO L130 PetriNetUnfolder]: 188/1241 cut-off events. [2023-01-28 00:30:54,512 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-01-28 00:30:54,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:30:54,513 INFO L208 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:30:54,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:30:54,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:30:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash -977110885, now seen corresponding path program 1 times [2023-01-28 00:30:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:30:54,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959646128] [2023-01-28 00:30:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:30:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:30:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:30:54,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:30:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:30:54,669 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:30:54,669 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:30:54,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:30:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-01-28 00:30:54,669 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:30:54,670 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:30:54,670 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:30:54,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2023-01-28 00:30:54,924 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:30:54,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2536 places, 2800 transitions, 7712 flow [2023-01-28 00:30:58,166 INFO L130 PetriNetUnfolder]: 397/3326 cut-off events. [2023-01-28 00:30:58,166 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-01-28 00:30:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4449 conditions, 3326 events. 397/3326 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15992 event pairs, 0 based on Foata normal form. 0/2840 useless extension candidates. Maximal degree in co-relation 4314. Up to 90 conditions per place. [2023-01-28 00:30:58,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 2536 places, 2800 transitions, 7712 flow [2023-01-28 00:30:58,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2536 places, 2800 transitions, 7712 flow [2023-01-28 00:30:58,518 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:30:58,518 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2536 places, 2800 transitions, 7712 flow [2023-01-28 00:30:58,518 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2536 places, 2800 transitions, 7712 flow [2023-01-28 00:30:58,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2536 places, 2800 transitions, 7712 flow [2023-01-28 00:31:01,855 INFO L130 PetriNetUnfolder]: 397/3326 cut-off events. [2023-01-28 00:31:01,855 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-01-28 00:31:02,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4449 conditions, 3326 events. 397/3326 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 15992 event pairs, 0 based on Foata normal form. 0/2840 useless extension candidates. Maximal degree in co-relation 4314. Up to 90 conditions per place. [2023-01-28 00:31:03,435 INFO L119 LiptonReduction]: Number of co-enabled transitions 7461080 [2023-01-28 00:31:31,710 INFO L134 LiptonReduction]: Checked pairs total: 16068851 [2023-01-28 00:31:31,710 INFO L136 LiptonReduction]: Total number of compositions: 2213 [2023-01-28 00:31:31,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:31:31,712 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:31:31,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:31:32,204 INFO L130 PetriNetUnfolder]: 191/1274 cut-off events. [2023-01-28 00:31:32,204 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-01-28 00:31:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:31:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:31:32,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:31:32,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:31:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1806817172, now seen corresponding path program 1 times [2023-01-28 00:31:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:31:32,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743816689] [2023-01-28 00:31:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:31:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:31:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:31:32,346 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:31:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:31:32,409 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:31:32,409 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:31:32,409 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:31:32,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-01-28 00:31:32,410 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:31:32,410 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:31:32,410 WARN L233 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:31:32,410 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2023-01-28 00:31:32,608 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:31:32,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2593 places, 2863 transitions, 7931 flow [2023-01-28 00:31:35,888 INFO L130 PetriNetUnfolder]: 406/3401 cut-off events. [2023-01-28 00:31:35,888 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-01-28 00:31:36,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4572 conditions, 3401 events. 406/3401 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 16381 event pairs, 0 based on Foata normal form. 0/2904 useless extension candidates. Maximal degree in co-relation 4436. Up to 92 conditions per place. [2023-01-28 00:31:36,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 2593 places, 2863 transitions, 7931 flow [2023-01-28 00:31:36,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2593 places, 2863 transitions, 7931 flow [2023-01-28 00:31:36,234 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:31:36,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2593 places, 2863 transitions, 7931 flow [2023-01-28 00:31:36,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2593 places, 2863 transitions, 7931 flow [2023-01-28 00:31:36,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2593 places, 2863 transitions, 7931 flow [2023-01-28 00:31:39,585 INFO L130 PetriNetUnfolder]: 406/3401 cut-off events. [2023-01-28 00:31:39,585 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-01-28 00:31:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4572 conditions, 3401 events. 406/3401 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 16381 event pairs, 0 based on Foata normal form. 0/2904 useless extension candidates. Maximal degree in co-relation 4436. Up to 92 conditions per place. [2023-01-28 00:31:41,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 7806420 [2023-01-28 00:32:09,587 INFO L134 LiptonReduction]: Checked pairs total: 16736207 [2023-01-28 00:32:09,588 INFO L136 LiptonReduction]: Total number of compositions: 2274 [2023-01-28 00:32:09,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 00:32:09,589 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;@107c3e43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 00:32:09,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 00:32:10,126 INFO L130 PetriNetUnfolder]: 203/1318 cut-off events. [2023-01-28 00:32:10,126 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-01-28 00:32:10,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 00:32:10,127 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 00:32:10,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 00:32:10,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 00:32:10,127 INFO L85 PathProgramCache]: Analyzing trace with hash 789368598, now seen corresponding path program 1 times [2023-01-28 00:32:10,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 00:32:10,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712086377] [2023-01-28 00:32:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 00:32:10,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 00:32:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:32:10,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 00:32:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 00:32:10,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 00:32:10,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 00:32:10,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 00:32:10,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-01-28 00:32:10,360 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 00:32:10,363 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 00:32:10,363 WARN L233 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 00:32:10,366 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2023-01-28 00:32:10,584 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 00:32:10,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2650 places, 2926 transitions, 8152 flow [2023-01-28 00:32:14,177 INFO L130 PetriNetUnfolder]: 415/3476 cut-off events. [2023-01-28 00:32:14,178 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-01-28 00:32:14,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 3476 events. 415/3476 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 16735 event pairs, 0 based on Foata normal form. 0/2968 useless extension candidates. Maximal degree in co-relation 4559. Up to 94 conditions per place. [2023-01-28 00:32:14,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 2650 places, 2926 transitions, 8152 flow [2023-01-28 00:32:14,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2650 places, 2926 transitions, 8152 flow [2023-01-28 00:32:14,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 00:32:14,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2650 places, 2926 transitions, 8152 flow [2023-01-28 00:32:14,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2650 places, 2926 transitions, 8152 flow [2023-01-28 00:32:14,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2650 places, 2926 transitions, 8152 flow [2023-01-28 00:32:17,977 INFO L130 PetriNetUnfolder]: 415/3476 cut-off events. [2023-01-28 00:32:17,977 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-01-28 00:32:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4696 conditions, 3476 events. 415/3476 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 16735 event pairs, 0 based on Foata normal form. 0/2968 useless extension candidates. Maximal degree in co-relation 4559. Up to 94 conditions per place. [2023-01-28 00:32:19,862 INFO L119 LiptonReduction]: Number of co-enabled transitions 8159572 Received shutdown request... [2023-01-28 00:32:33,664 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 00:32:34,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown