/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/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:55:31,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:55:31,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:55:31,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 01:55:31,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:55:31,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:55:31,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:55:31,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:55:31,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:55:31,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:55:31,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:55:31,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:55:31,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:55:31,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:55:31,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:55:31,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:55:31,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 01:55:31,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:55:31,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:55:31,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:55:31,150 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 01:55:31,165 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:55:31,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:55:31,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:55:31,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:55:31,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:55:31,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:55:31,166 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:55:31,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:55:31,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:55:31,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:55:31,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:55:31,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:55:31,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:55:31,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:55:31,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:55:31,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:55:31,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:55:31,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:55:31,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:55:31,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:55:31,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:55:31,377 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:55:31,378 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:55:31,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-01-28 01:55:32,339 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:55:32,482 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:55:32,482 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-01-28 01:55:32,505 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168671fc2/bb61b77bd7c049dc94d19e6f2d586296/FLAGf1f1e2fde [2023-01-28 01:55:32,513 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168671fc2/bb61b77bd7c049dc94d19e6f2d586296 [2023-01-28 01:55:32,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:55:32,516 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:55:32,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:55:32,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:55:32,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:55:32,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:32,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631ec228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32, skipping insertion in model container [2023-01-28 01:55:32,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:32,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:55:32,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:55:32,836 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-01-28 01:55:32,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:55:32,867 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:55:32,898 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-01-28 01:55:32,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:55:32,953 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:55:32,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32 WrapperNode [2023-01-28 01:55:32,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:55:32,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:55:32,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:55:32,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:55:32,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:32,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,016 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-01-28 01:55:33,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:55:33,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:55:33,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:55:33,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:55:33,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,056 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:55:33,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:55:33,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:55:33,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:55:33,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (1/1) ... [2023-01-28 01:55:33,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:55:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:33,091 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 01:55:33,110 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 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 01:55:33,121 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 01:55:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:55:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:55:33,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:55:33,123 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 01:55:33,236 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:55:33,237 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:55:33,429 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:55:33,435 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:55:33,435 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-28 01:55:33,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:55:33 BoogieIcfgContainer [2023-01-28 01:55:33,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:55:33,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:55:33,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:55:33,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:55:33,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:55:32" (1/3) ... [2023-01-28 01:55:33,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fb32c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:55:33, skipping insertion in model container [2023-01-28 01:55:33,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:55:32" (2/3) ... [2023-01-28 01:55:33,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fb32c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:55:33, skipping insertion in model container [2023-01-28 01:55:33,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:55:33" (3/3) ... [2023-01-28 01:55:33,442 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-01-28 01:55:33,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:55:33,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 01:55:33,454 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:55:33,537 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 01:55:33,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 190 transitions, 388 flow [2023-01-28 01:55:33,654 INFO L130 PetriNetUnfolder]: 45/260 cut-off events. [2023-01-28 01:55:33,654 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-01-28 01:55:33,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 260 events. 45/260 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 817 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-28 01:55:33,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 190 transitions, 388 flow [2023-01-28 01:55:33,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 185 transitions, 375 flow [2023-01-28 01:55:33,670 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:33,686 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 185 transitions, 375 flow [2023-01-28 01:55:33,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 185 transitions, 375 flow [2023-01-28 01:55:33,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 185 transitions, 375 flow [2023-01-28 01:55:33,719 INFO L130 PetriNetUnfolder]: 44/255 cut-off events. [2023-01-28 01:55:33,719 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:33,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 255 events. 44/255 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 776 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-28 01:55:33,724 INFO L119 LiptonReduction]: Number of co-enabled transitions 10336 [2023-01-28 01:55:35,716 INFO L134 LiptonReduction]: Checked pairs total: 15158 [2023-01-28 01:55:35,716 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-01-28 01:55:35,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:35,731 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;@6d2b9c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:35,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:35,735 INFO L130 PetriNetUnfolder]: 11/41 cut-off events. [2023-01-28 01:55:35,735 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:35,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:35,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 01:55:35,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:35,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash -164803575, now seen corresponding path program 1 times [2023-01-28 01:55:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431862425] [2023-01-28 01:55:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:35,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431862425] [2023-01-28 01:55:35,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431862425] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:35,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:35,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:35,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099496774] [2023-01-28 01:55:35,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:35,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:35,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-28 01:55:35,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 65 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:35,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:35,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-28 01:55:35,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:36,080 INFO L130 PetriNetUnfolder]: 301/651 cut-off events. [2023-01-28 01:55:36,080 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:36,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 651 events. 301/651 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3189 event pairs, 266 based on Foata normal form. 107/643 useless extension candidates. Maximal degree in co-relation 1189. Up to 588 conditions per place. [2023-01-28 01:55:36,084 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 20 selfloop transitions, 2 changer transitions 19/46 dead transitions. [2023-01-28 01:55:36,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-01-28 01:55:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:55:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:55:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-01-28 01:55:36,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034213098729228 [2023-01-28 01:55:36,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-01-28 01:55:36,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-01-28 01:55:36,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:36,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-01-28 01:55:36,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,111 INFO L175 Difference]: Start difference. First operand has 45 places, 65 transitions, 135 flow. Second operand 3 states and 515 transitions. [2023-01-28 01:55:36,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-01-28 01:55:36,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:55:36,114 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 69 flow [2023-01-28 01:55:36,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-01-28 01:55:36,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-01-28 01:55:36,117 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 69 flow [2023-01-28 01:55:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:36,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:36,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:55:36,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:36,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:36,119 INFO L85 PathProgramCache]: Analyzing trace with hash 716448256, now seen corresponding path program 1 times [2023-01-28 01:55:36,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619706494] [2023-01-28 01:55:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:36,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:36,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619706494] [2023-01-28 01:55:36,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619706494] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:36,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25202021] [2023-01-28 01:55:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:36,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:36,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:55:36,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 01:55:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:36,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:55:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:36,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:36,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25202021] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:36,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:55:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088943990] [2023-01-28 01:55:36,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:36,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:55:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:55:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:55:36,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-28 01:55:36,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 153.57142857142858) internal successors, (1075), 7 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:36,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-28 01:55:36,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:36,446 INFO L130 PetriNetUnfolder]: 47/128 cut-off events. [2023-01-28 01:55:36,446 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:55:36,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 47/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 108 conditions per place. [2023-01-28 01:55:36,447 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-01-28 01:55:36,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-01-28 01:55:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:55:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:55:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 940 transitions. [2023-01-28 01:55:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45943304007820135 [2023-01-28 01:55:36,449 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 940 transitions. [2023-01-28 01:55:36,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 940 transitions. [2023-01-28 01:55:36,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:36,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 940 transitions. [2023-01-28 01:55:36,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.66666666666666) internal successors, (940), 6 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,455 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,455 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 69 flow. Second operand 6 states and 940 transitions. [2023-01-28 01:55:36,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-01-28 01:55:36,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:36,456 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-01-28 01:55:36,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-01-28 01:55:36,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-01-28 01:55:36,457 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-01-28 01:55:36,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.57142857142858) internal successors, (1075), 7 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:36,458 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:36,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:36,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:36,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:36,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1278120393, now seen corresponding path program 2 times [2023-01-28 01:55:36,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:36,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222363974] [2023-01-28 01:55:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:36,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:36,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:36,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222363974] [2023-01-28 01:55:36,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222363974] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:36,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498492182] [2023-01-28 01:55:36,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:55:36,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:36,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:55:36,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 01:55:36,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:55:36,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:55:36,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:55:36,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:36,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:55:36,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498492182] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:36,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:36,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:55:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566529956] [2023-01-28 01:55:36,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:36,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:55:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:55:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:55:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 341 [2023-01-28 01:55:36,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 153.30769230769232) internal successors, (1993), 13 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:36,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 341 [2023-01-28 01:55:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:36,974 INFO L130 PetriNetUnfolder]: 47/134 cut-off events. [2023-01-28 01:55:36,974 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 01:55:36,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 47/134 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 42 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 234. Up to 108 conditions per place. [2023-01-28 01:55:36,975 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-01-28 01:55:36,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-01-28 01:55:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:55:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:55:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1861 transitions. [2023-01-28 01:55:36,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478983382209187 [2023-01-28 01:55:36,978 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1861 transitions. [2023-01-28 01:55:36,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1861 transitions. [2023-01-28 01:55:36,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:36,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1861 transitions. [2023-01-28 01:55:36,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 155.08333333333334) internal successors, (1861), 12 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,989 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 341.0) internal successors, (4433), 13 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,989 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1861 transitions. [2023-01-28 01:55:36,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-01-28 01:55:36,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:36,992 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-01-28 01:55:36,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-01-28 01:55:36,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-01-28 01:55:36,993 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-01-28 01:55:36,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.30769230769232) internal successors, (1993), 13 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:36,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:36,994 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:37,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:37,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-01-28 01:55:37,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:37,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 766826089, now seen corresponding path program 3 times [2023-01-28 01:55:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381270736] [2023-01-28 01:55:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:37,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:55:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:37,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:55:37,279 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:55:37,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:55:37,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:55:37,281 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:55:37,282 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:55:37,283 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:55:37,283 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 01:55:37,304 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:55:37,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-01-28 01:55:37,344 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-01-28 01:55:37,345 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 01:55:37,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-01-28 01:55:37,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 260 transitions, 538 flow [2023-01-28 01:55:37,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 260 transitions, 538 flow [2023-01-28 01:55:37,351 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:37,351 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 260 transitions, 538 flow [2023-01-28 01:55:37,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 260 transitions, 538 flow [2023-01-28 01:55:37,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 260 transitions, 538 flow [2023-01-28 01:55:37,390 INFO L130 PetriNetUnfolder]: 75/424 cut-off events. [2023-01-28 01:55:37,390 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-01-28 01:55:37,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 75/424 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1687 event pairs, 0 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-01-28 01:55:37,408 INFO L119 LiptonReduction]: Number of co-enabled transitions 31416 [2023-01-28 01:55:39,831 INFO L134 LiptonReduction]: Checked pairs total: 55124 [2023-01-28 01:55:39,832 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-01-28 01:55:39,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:39,834 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;@6d2b9c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:39,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:39,839 INFO L130 PetriNetUnfolder]: 35/109 cut-off events. [2023-01-28 01:55:39,839 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 01:55:39,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:39,839 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:39,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:39,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1123911026, now seen corresponding path program 1 times [2023-01-28 01:55:39,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:39,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216890021] [2023-01-28 01:55:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:39,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216890021] [2023-01-28 01:55:39,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216890021] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:39,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:39,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:39,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696327794] [2023-01-28 01:55:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:39,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:39,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:39,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-28 01:55:39,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:39,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:39,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-28 01:55:39,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:40,815 INFO L130 PetriNetUnfolder]: 9872/15757 cut-off events. [2023-01-28 01:55:40,815 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-01-28 01:55:40,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30205 conditions, 15757 events. 9872/15757 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 104377 event pairs, 9112 based on Foata normal form. 2730/16056 useless extension candidates. Maximal degree in co-relation 12164. Up to 14349 conditions per place. [2023-01-28 01:55:40,847 INFO L137 encePairwiseOnDemand]: 444/478 looper letters, 36 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-01-28 01:55:40,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-01-28 01:55:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:55:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:55:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-01-28 01:55:40,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49511854951185497 [2023-01-28 01:55:40,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-01-28 01:55:40,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-01-28 01:55:40,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:40,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-01-28 01:55:40,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:40,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:40,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:40,853 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 710 transitions. [2023-01-28 01:55:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-01-28 01:55:40,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:55:40,857 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-01-28 01:55:40,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-01-28 01:55:40,858 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-01-28 01:55:40,859 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-01-28 01:55:40,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:40,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:40,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:55:40,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:40,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash -207077384, now seen corresponding path program 1 times [2023-01-28 01:55:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868066871] [2023-01-28 01:55:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:40,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:40,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868066871] [2023-01-28 01:55:40,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868066871] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563074511] [2023-01-28 01:55:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:40,906 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:55:40,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 01:55:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:55:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:40,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563074511] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:40,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:40,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:55:40,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860970401] [2023-01-28 01:55:40,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:55:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:55:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:55:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-28 01:55:40,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:40,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:40,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-28 01:55:40,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:41,252 INFO L130 PetriNetUnfolder]: 1738/2923 cut-off events. [2023-01-28 01:55:41,253 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2023-01-28 01:55:41,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 2923 events. 1738/2923 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16152 event pairs, 1617 based on Foata normal form. 0/2391 useless extension candidates. Maximal degree in co-relation 5636. Up to 2647 conditions per place. [2023-01-28 01:55:41,263 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-01-28 01:55:41,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 210 flow [2023-01-28 01:55:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:55:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:55:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-01-28 01:55:41,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44839609483960946 [2023-01-28 01:55:41,268 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-01-28 01:55:41,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-01-28 01:55:41,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-01-28 01:55:41,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,276 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 478.0) internal successors, (3346), 7 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,276 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1286 transitions. [2023-01-28 01:55:41,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 210 flow [2023-01-28 01:55:41,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:41,279 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-01-28 01:55:41,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-01-28 01:55:41,281 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-01-28 01:55:41,281 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-01-28 01:55:41,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:41,282 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:41,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:41,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:41,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:41,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1964701426, now seen corresponding path program 2 times [2023-01-28 01:55:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:41,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299351658] [2023-01-28 01:55:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:41,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:41,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299351658] [2023-01-28 01:55:41,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299351658] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:55:41,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031738742] [2023-01-28 01:55:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:55:41,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:55:41,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:55:41,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 01:55:41,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:55:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:55:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:55:41,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:55:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:41,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:55:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:55:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031738742] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:55:41,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:55:41,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:55:41,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729387519] [2023-01-28 01:55:41,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:55:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:55:41,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:55:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:55:41,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 478 [2023-01-28 01:55:41,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:41,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 478 [2023-01-28 01:55:41,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:55:41,878 INFO L130 PetriNetUnfolder]: 1738/2929 cut-off events. [2023-01-28 01:55:41,878 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-28 01:55:41,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 2929 events. 1738/2929 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16191 event pairs, 1617 based on Foata normal form. 6/2404 useless extension candidates. Maximal degree in co-relation 5621. Up to 2647 conditions per place. [2023-01-28 01:55:41,891 INFO L137 encePairwiseOnDemand]: 475/478 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-01-28 01:55:41,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 276 flow [2023-01-28 01:55:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:55:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:55:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2537 transitions. [2023-01-28 01:55:41,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422942817294282 [2023-01-28 01:55:41,897 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2537 transitions. [2023-01-28 01:55:41,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2537 transitions. [2023-01-28 01:55:41,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:55:41,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2537 transitions. [2023-01-28 01:55:41,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 211.41666666666666) internal successors, (2537), 12 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,908 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 478.0) internal successors, (6214), 13 states have internal predecessors, (6214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,908 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2537 transitions. [2023-01-28 01:55:41,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 276 flow [2023-01-28 01:55:41,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 262 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:55:41,911 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-01-28 01:55:41,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=478, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-01-28 01:55:41,912 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-01-28 01:55:41,912 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-01-28 01:55:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 208.3846153846154) internal successors, (2709), 13 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:41,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:41,913 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:55:41,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 01:55:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:55:42,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:42,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash -193054414, now seen corresponding path program 3 times [2023-01-28 01:55:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996596384] [2023-01-28 01:55:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:42,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:42,138 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:55:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:55:42,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:55:42,159 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:55:42,160 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:55:42,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:55:42,160 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:55:42,160 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:55:42,160 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:55:42,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 01:55:42,191 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 01:55:42,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-01-28 01:55:42,248 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-01-28 01:55:42,249 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 01:55:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-28 01:55:42,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 330 transitions, 690 flow [2023-01-28 01:55:42,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 330 transitions, 690 flow [2023-01-28 01:55:42,258 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:55:42,258 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 330 transitions, 690 flow [2023-01-28 01:55:42,259 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 330 transitions, 690 flow [2023-01-28 01:55:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 330 transitions, 690 flow [2023-01-28 01:55:42,310 INFO L130 PetriNetUnfolder]: 110/619 cut-off events. [2023-01-28 01:55:42,310 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-01-28 01:55:42,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 619 events. 110/619 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2706 event pairs, 1 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 432. Up to 16 conditions per place. [2023-01-28 01:55:42,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 61608 [2023-01-28 01:55:45,245 INFO L134 LiptonReduction]: Checked pairs total: 109900 [2023-01-28 01:55:45,246 INFO L136 LiptonReduction]: Total number of compositions: 271 [2023-01-28 01:55:45,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:55:45,247 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;@6d2b9c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:55:45,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:55:45,257 INFO L130 PetriNetUnfolder]: 62/180 cut-off events. [2023-01-28 01:55:45,257 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 01:55:45,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:55:45,257 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:55:45,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:55:45,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:55:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1033079782, now seen corresponding path program 1 times [2023-01-28 01:55:45,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:55:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768362316] [2023-01-28 01:55:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:55:45,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:55:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:55:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:55:45,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:55:45,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768362316] [2023-01-28 01:55:45,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768362316] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:55:45,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:55:45,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:55:45,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413699051] [2023-01-28 01:55:45,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:55:45,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:55:45,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:55:45,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:55:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:55:45,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-28 01:55:45,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:55:45,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:55:45,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-28 01:55:45,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:56:04,017 INFO L130 PetriNetUnfolder]: 252661/348965 cut-off events. [2023-01-28 01:56:04,018 INFO L131 PetriNetUnfolder]: For 3589/3589 co-relation queries the response was YES. [2023-01-28 01:56:04,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8440. Compared 2625001 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-01-28 01:56:04,755 INFO L137 encePairwiseOnDemand]: 556/601 looper letters, 53 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-01-28 01:56:04,755 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-01-28 01:56:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:56:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:56:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-01-28 01:56:04,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013865779256794 [2023-01-28 01:56:04,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-01-28 01:56:04,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-01-28 01:56:04,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:56:04,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-01-28 01:56:04,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:04,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:04,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:04,764 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 292 flow. Second operand 3 states and 904 transitions. [2023-01-28 01:56:04,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-01-28 01:56:04,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:56:04,768 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-01-28 01:56:04,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-01-28 01:56:04,769 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-01-28 01:56:04,769 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-01-28 01:56:04,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:04,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:04,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:56:04,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:04,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1353270178, now seen corresponding path program 1 times [2023-01-28 01:56:04,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:04,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994350341] [2023-01-28 01:56:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:04,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:04,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:56:04,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994350341] [2023-01-28 01:56:04,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994350341] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:56:04,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123206845] [2023-01-28 01:56:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:04,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:56:04,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:56:04,800 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:56:04,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 01:56:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:04,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:56:04,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:56:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:04,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:56:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:04,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123206845] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:56:04,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:56:04,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:56:04,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265272993] [2023-01-28 01:56:04,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:56:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:56:04,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:56:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:56:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:56:04,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-28 01:56:04,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 263.85714285714283) internal successors, (1847), 7 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:04,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:56:04,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-28 01:56:04,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:56:08,307 INFO L130 PetriNetUnfolder]: 46210/64953 cut-off events. [2023-01-28 01:56:08,307 INFO L131 PetriNetUnfolder]: For 1816/1816 co-relation queries the response was YES. [2023-01-28 01:56:08,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127740 conditions, 64953 events. 46210/64953 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431889 event pairs, 43965 based on Foata normal form. 0/53862 useless extension candidates. Maximal degree in co-relation 127726. Up to 61443 conditions per place. [2023-01-28 01:56:08,532 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-01-28 01:56:08,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 291 flow [2023-01-28 01:56:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:56:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:56:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1633 transitions. [2023-01-28 01:56:08,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528563505268996 [2023-01-28 01:56:08,536 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1633 transitions. [2023-01-28 01:56:08,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1633 transitions. [2023-01-28 01:56:08,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:56:08,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1633 transitions. [2023-01-28 01:56:08,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 272.1666666666667) internal successors, (1633), 6 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:08,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:08,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:08,544 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1633 transitions. [2023-01-28 01:56:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 291 flow [2023-01-28 01:56:08,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 281 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 01:56:08,547 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-01-28 01:56:08,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-01-28 01:56:08,548 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-01-28 01:56:08,548 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-01-28 01:56:08,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 263.85714285714283) internal successors, (1847), 7 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:08,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:08,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:08,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 01:56:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 01:56:08,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:08,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 756541926, now seen corresponding path program 2 times [2023-01-28 01:56:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316399626] [2023-01-28 01:56:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:08,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:56:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316399626] [2023-01-28 01:56:08,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316399626] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:56:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357278416] [2023-01-28 01:56:08,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:56:08,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:56:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:56:08,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 01:56:08,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 01:56:08,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:56:08,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:56:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:56:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:56:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:08,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:56:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:56:08,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357278416] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:56:08,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:56:08,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:56:08,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974902550] [2023-01-28 01:56:08,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:56:08,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:56:08,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:56:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:56:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:56:08,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 601 [2023-01-28 01:56:08,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:08,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:56:08,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 601 [2023-01-28 01:56:08,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:56:12,611 INFO L130 PetriNetUnfolder]: 46210/64959 cut-off events. [2023-01-28 01:56:12,611 INFO L131 PetriNetUnfolder]: For 822/822 co-relation queries the response was YES. [2023-01-28 01:56:12,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127353 conditions, 64959 events. 46210/64959 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 431856 event pairs, 43965 based on Foata normal form. 6/53875 useless extension candidates. Maximal degree in co-relation 127293. Up to 61443 conditions per place. [2023-01-28 01:56:12,871 INFO L137 encePairwiseOnDemand]: 598/601 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-01-28 01:56:12,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 353 flow [2023-01-28 01:56:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:56:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:56:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3214 transitions. [2023-01-28 01:56:12,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456461453133666 [2023-01-28 01:56:12,876 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3214 transitions. [2023-01-28 01:56:12,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3214 transitions. [2023-01-28 01:56:12,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:56:12,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3214 transitions. [2023-01-28 01:56:12,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 267.8333333333333) internal successors, (3214), 12 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:12,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:12,887 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:12,887 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3214 transitions. [2023-01-28 01:56:12,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 353 flow [2023-01-28 01:56:12,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:56:12,888 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-01-28 01:56:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-01-28 01:56:12,889 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-01-28 01:56:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-01-28 01:56:12,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:12,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:12,890 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:12,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 01:56:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:56:13,095 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:13,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1545885414, now seen corresponding path program 3 times [2023-01-28 01:56:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788760124] [2023-01-28 01:56:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:56:13,112 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:56:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:56:13,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:56:13,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:56:13,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:56:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:56:13,141 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:56:13,141 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:56:13,141 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:56:13,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 01:56:13,164 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 01:56:13,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-01-28 01:56:13,255 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-01-28 01:56:13,255 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-28 01:56:13,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-01-28 01:56:13,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 400 transitions, 844 flow [2023-01-28 01:56:13,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 400 transitions, 844 flow [2023-01-28 01:56:13,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:56:13,271 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 400 transitions, 844 flow [2023-01-28 01:56:13,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 400 transitions, 844 flow [2023-01-28 01:56:13,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 400 transitions, 844 flow [2023-01-28 01:56:13,500 INFO L130 PetriNetUnfolder]: 157/878 cut-off events. [2023-01-28 01:56:13,501 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2023-01-28 01:56:13,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 933 conditions, 878 events. 157/878 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4177 event pairs, 6 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 639. Up to 32 conditions per place. [2023-01-28 01:56:13,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 101456 [2023-01-28 01:56:16,669 INFO L134 LiptonReduction]: Checked pairs total: 181238 [2023-01-28 01:56:16,669 INFO L136 LiptonReduction]: Total number of compositions: 324 [2023-01-28 01:56:16,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:56:16,671 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;@6d2b9c67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:56:16,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:56:16,681 INFO L130 PetriNetUnfolder]: 85/247 cut-off events. [2023-01-28 01:56:16,681 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 01:56:16,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:56:16,682 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:56:16,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:56:16,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:56:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -154404429, now seen corresponding path program 1 times [2023-01-28 01:56:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:56:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933580311] [2023-01-28 01:56:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:56:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:56:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:56:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 01:56:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:56:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933580311] [2023-01-28 01:56:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933580311] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:56:16,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:56:16,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:56:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433980429] [2023-01-28 01:56:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:56:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:56:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:56:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:56:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:56:16,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 724 [2023-01-28 01:56:16,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 161 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 01:56:16,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:56:16,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 724 [2023-01-28 01:56:16,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand