/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:11:16,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:11:16,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:11:16,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:11:16,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:11:16,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:11:16,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:11:16,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:11:16,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:11:16,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:11:16,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:11:16,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:11:16,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:11:16,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:11:16,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:11:16,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:11:16,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:11:16,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:11:16,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:11:16,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:11:16,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:11:16,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:11:16,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:11:16,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:11:16,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:11:16,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:11:16,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:11:16,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:11:16,515 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 [2023-01-27 19:11:16,549 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:11:16,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:11:16,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:11:16,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:11:16,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:11:16,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:11:16,552 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:11:16,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:11:16,552 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:11:16,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:11:16,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:11:16,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:11:16,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:11:16,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:11:16,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:11:16,553 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:11:16,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:11:16,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:11:16,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:11:16,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:11:16,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:11:16,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:11:16,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:11:16,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:11:16,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:11:16,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:11:16,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:11:16,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:11:16,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:11:16,812 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:11:16,813 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:11:16,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-01-27 19:11:17,885 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:11:18,096 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:11:18,097 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-01-27 19:11:18,110 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/409fdda21/b01eaa0ddaf04aa6b2100e5a1d7c5c53/FLAGa73a6c29f [2023-01-27 19:11:18,126 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/409fdda21/b01eaa0ddaf04aa6b2100e5a1d7c5c53 [2023-01-27 19:11:18,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:11:18,129 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:11:18,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:11:18,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:11:18,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:11:18,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61020a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18, skipping insertion in model container [2023-01-27 19:11:18,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:11:18,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:11:18,469 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_19-callback_racing.i[30212,30225] [2023-01-27 19:11:18,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:11:18,504 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:11:18,534 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_19-callback_racing.i[30212,30225] [2023-01-27 19:11:18,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:11:18,569 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 19:11:18,573 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:11:18,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18 WrapperNode [2023-01-27 19:11:18,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:11:18,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:11:18,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:11:18,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:11:18,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,607 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-01-27 19:11:18,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:11:18,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:11:18,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:11:18,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:11:18,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:11:18,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:11:18,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:11:18,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:11:18,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (1/1) ... [2023-01-27 19:11:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:11:18,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:18,659 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) [2023-01-27 19:11:18,663 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 [2023-01-27 19:11:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:11:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:11:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:11:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:11:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:11:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:11:18,688 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:11:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:11:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:11:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:11:18,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:11:18,690 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:11:18,821 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:11:18,822 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:11:19,093 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:11:19,100 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:11:19,100 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-27 19:11:19,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:11:19 BoogieIcfgContainer [2023-01-27 19:11:19,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:11:19,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:11:19,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:11:19,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:11:19,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:11:18" (1/3) ... [2023-01-27 19:11:19,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cca14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:11:19, skipping insertion in model container [2023-01-27 19:11:19,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:11:18" (2/3) ... [2023-01-27 19:11:19,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cca14b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:11:19, skipping insertion in model container [2023-01-27 19:11:19,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:11:19" (3/3) ... [2023-01-27 19:11:19,122 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-01-27 19:11:19,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:11:19,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:11:19,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:11:19,190 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:11:19,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 135 transitions, 278 flow [2023-01-27 19:11:19,281 INFO L130 PetriNetUnfolder]: 26/205 cut-off events. [2023-01-27 19:11:19,281 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:19,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 205 events. 26/205 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 529 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-01-27 19:11:19,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 135 transitions, 278 flow [2023-01-27 19:11:19,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 265 flow [2023-01-27 19:11:19,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:19,303 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 265 flow [2023-01-27 19:11:19,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 265 flow [2023-01-27 19:11:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 265 flow [2023-01-27 19:11:19,352 INFO L130 PetriNetUnfolder]: 25/200 cut-off events. [2023-01-27 19:11:19,352 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:19,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 200 events. 25/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 492 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-01-27 19:11:19,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 3040 [2023-01-27 19:11:22,430 INFO L134 LiptonReduction]: Checked pairs total: 4311 [2023-01-27 19:11:22,431 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-01-27 19:11:22,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:22,448 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;@5236867c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:22,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 19:11:22,453 INFO L130 PetriNetUnfolder]: 6/25 cut-off events. [2023-01-27 19:11:22,453 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:22,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:22,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:22,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 19:11:22,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:22,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2099220035, now seen corresponding path program 1 times [2023-01-27 19:11:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739460798] [2023-01-27 19:11:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:22,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:22,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739460798] [2023-01-27 19:11:22,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739460798] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:22,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:22,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:22,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706366945] [2023-01-27 19:11:22,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:22,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 254 [2023-01-27 19:11:22,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 34 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:22,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:22,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 254 [2023-01-27 19:11:22,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:22,859 INFO L130 PetriNetUnfolder]: 88/207 cut-off events. [2023-01-27 19:11:22,859 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:11:22,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 207 events. 88/207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 731 event pairs, 32 based on Foata normal form. 29/194 useless extension candidates. Maximal degree in co-relation 356. Up to 122 conditions per place. [2023-01-27 19:11:22,862 INFO L137 encePairwiseOnDemand]: 241/254 looper letters, 23 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-01-27 19:11:22,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 127 flow [2023-01-27 19:11:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-01-27 19:11:22,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091863517060368 [2023-01-27 19:11:22,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-01-27 19:11:22,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-01-27 19:11:22,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:22,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-01-27 19:11:22,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:22,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:22,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:22,900 INFO L175 Difference]: Start difference. First operand has 26 places, 34 transitions, 73 flow. Second operand 3 states and 388 transitions. [2023-01-27 19:11:22,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 127 flow [2023-01-27 19:11:22,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 32 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:22,905 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 63 flow [2023-01-27 19:11:22,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-01-27 19:11:22,912 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-01-27 19:11:22,912 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 63 flow [2023-01-27 19:11:22,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:22,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:22,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:11:22,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:11:22,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 19:11:22,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2099235342, now seen corresponding path program 1 times [2023-01-27 19:11:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:22,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33498351] [2023-01-27 19:11:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:22,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:22,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:22,977 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:22,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 19:11:22,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 19:11:22,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 19:11:22,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:11:22,981 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:11:22,983 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:22,983 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:11:22,998 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:11:23,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-01-27 19:11:23,030 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-01-27 19:11:23,030 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:11:23,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-01-27 19:11:23,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-01-27 19:11:23,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-01-27 19:11:23,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:23,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-01-27 19:11:23,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-01-27 19:11:23,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-01-27 19:11:23,060 INFO L130 PetriNetUnfolder]: 43/321 cut-off events. [2023-01-27 19:11:23,060 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:11:23,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 321 events. 43/321 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1104 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 207. Up to 9 conditions per place. [2023-01-27 19:11:23,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 7320 [2023-01-27 19:11:26,061 INFO L134 LiptonReduction]: Checked pairs total: 12194 [2023-01-27 19:11:26,061 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-01-27 19:11:26,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:26,064 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;@5236867c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:26,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 19:11:26,067 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-01-27 19:11:26,067 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:26,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:26,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:26,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:11:26,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1561690001, now seen corresponding path program 1 times [2023-01-27 19:11:26,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:26,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860255699] [2023-01-27 19:11:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:26,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:26,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:26,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860255699] [2023-01-27 19:11:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860255699] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:26,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038670645] [2023-01-27 19:11:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:26,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:26,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 290 [2023-01-27 19:11:26,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:26,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:26,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 290 [2023-01-27 19:11:26,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:26,380 INFO L130 PetriNetUnfolder]: 1919/3175 cut-off events. [2023-01-27 19:11:26,381 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2023-01-27 19:11:26,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6326 conditions, 3175 events. 1919/3175 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 15999 event pairs, 823 based on Foata normal form. 197/2722 useless extension candidates. Maximal degree in co-relation 2292. Up to 2046 conditions per place. [2023-01-27 19:11:26,394 INFO L137 encePairwiseOnDemand]: 274/290 looper letters, 46 selfloop transitions, 2 changer transitions 6/58 dead transitions. [2023-01-27 19:11:26,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 248 flow [2023-01-27 19:11:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-01-27 19:11:26,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298850574712644 [2023-01-27 19:11:26,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-01-27 19:11:26,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-01-27 19:11:26,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:26,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-01-27 19:11:26,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-01-27 19:11:26,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:26,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:26,400 INFO L175 Difference]: Start difference. First operand has 39 places, 49 transitions, 116 flow. Second operand 3 states and 461 transitions. [2023-01-27 19:11:26,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 248 flow [2023-01-27 19:11:26,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:26,402 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 110 flow [2023-01-27 19:11:26,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-01-27 19:11:26,403 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-01-27 19:11:26,403 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 110 flow [2023-01-27 19:11:26,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:26,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:26,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:11:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:11:26,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 19:11:26,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1130747368, now seen corresponding path program 1 times [2023-01-27 19:11:26,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:26,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494008946] [2023-01-27 19:11:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:26,418 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:26,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:26,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:26,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 19:11:26,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 19:11:26,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 19:11:26,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 19:11:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:11:26,444 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:11:26,445 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:26,445 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:11:26,466 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:11:26,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-01-27 19:11:26,510 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-01-27 19:11:26,510 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:11:26,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-01-27 19:11:26,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 179 transitions, 388 flow [2023-01-27 19:11:26,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 179 transitions, 388 flow [2023-01-27 19:11:26,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:26,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 179 transitions, 388 flow [2023-01-27 19:11:26,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 179 transitions, 388 flow [2023-01-27 19:11:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 179 transitions, 388 flow [2023-01-27 19:11:26,554 INFO L130 PetriNetUnfolder]: 65/468 cut-off events. [2023-01-27 19:11:26,554 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:11:26,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 468 events. 65/468 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1836 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2023-01-27 19:11:26,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 12360 [2023-01-27 19:11:29,630 INFO L134 LiptonReduction]: Checked pairs total: 22561 [2023-01-27 19:11:29,630 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-01-27 19:11:29,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:29,633 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;@5236867c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:29,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:11:29,635 INFO L130 PetriNetUnfolder]: 6/26 cut-off events. [2023-01-27 19:11:29,635 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:29,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:29,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:29,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:11:29,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash 409853202, now seen corresponding path program 1 times [2023-01-27 19:11:29,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:29,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579565820] [2023-01-27 19:11:29,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:29,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:29,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579565820] [2023-01-27 19:11:29,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579565820] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:29,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:29,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:29,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053318429] [2023-01-27 19:11:29,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:29,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:29,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:29,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 335 [2023-01-27 19:11:29,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:29,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:29,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 335 [2023-01-27 19:11:29,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:31,343 INFO L130 PetriNetUnfolder]: 15543/22667 cut-off events. [2023-01-27 19:11:31,344 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-01-27 19:11:31,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 22667 events. 15543/22667 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 137707 event pairs, 6456 based on Foata normal form. 1640/20475 useless extension candidates. Maximal degree in co-relation 5826. Up to 14692 conditions per place. [2023-01-27 19:11:31,515 INFO L137 encePairwiseOnDemand]: 317/335 looper letters, 56 selfloop transitions, 2 changer transitions 7/70 dead transitions. [2023-01-27 19:11:31,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 309 flow [2023-01-27 19:11:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-01-27 19:11:31,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194029850746269 [2023-01-27 19:11:31,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-01-27 19:11:31,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-01-27 19:11:31,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:31,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-01-27 19:11:31,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,522 INFO L175 Difference]: Start difference. First operand has 48 places, 59 transitions, 148 flow. Second operand 3 states and 522 transitions. [2023-01-27 19:11:31,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 309 flow [2023-01-27 19:11:31,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:31,527 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 136 flow [2023-01-27 19:11:31,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=136, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-01-27 19:11:31,529 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-01-27 19:11:31,530 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 136 flow [2023-01-27 19:11:31,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:31,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:31,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:11:31,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:11:31,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1615311293, now seen corresponding path program 1 times [2023-01-27 19:11:31,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:31,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713788687] [2023-01-27 19:11:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:31,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:31,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713788687] [2023-01-27 19:11:31,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713788687] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:11:31,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059438836] [2023-01-27 19:11:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:31,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:11:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:31,607 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) [2023-01-27 19:11:31,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:11:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:11:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:11:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:31,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:11:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:31,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059438836] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:11:31,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:11:31,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:11:31,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433902803] [2023-01-27 19:11:31,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:11:31,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:11:31,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:11:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:11:31,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 335 [2023-01-27 19:11:31,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:31,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 335 [2023-01-27 19:11:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:31,967 INFO L130 PetriNetUnfolder]: 1312/2176 cut-off events. [2023-01-27 19:11:31,967 INFO L131 PetriNetUnfolder]: For 635/635 co-relation queries the response was YES. [2023-01-27 19:11:31,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2176 events. 1312/2176 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11364 event pairs, 0 based on Foata normal form. 0/2176 useless extension candidates. Maximal degree in co-relation 4810. Up to 1248 conditions per place. [2023-01-27 19:11:31,976 INFO L137 encePairwiseOnDemand]: 332/335 looper letters, 48 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-01-27 19:11:31,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 238 flow [2023-01-27 19:11:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:11:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:11:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 926 transitions. [2023-01-27 19:11:31,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4606965174129353 [2023-01-27 19:11:31,979 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 926 transitions. [2023-01-27 19:11:31,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 926 transitions. [2023-01-27 19:11:31,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:31,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 926 transitions. [2023-01-27 19:11:31,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,986 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 136 flow. Second operand 6 states and 926 transitions. [2023-01-27 19:11:31,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 238 flow [2023-01-27 19:11:31,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 19:11:31,989 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 74 flow [2023-01-27 19:11:31,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=335, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-01-27 19:11:31,990 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -12 predicate places. [2023-01-27 19:11:31,990 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 74 flow [2023-01-27 19:11:31,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:31,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:31,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:11:32,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:11:32,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 19:11:32,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:11:32,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash 144683176, now seen corresponding path program 1 times [2023-01-27 19:11:32,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:32,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494058656] [2023-01-27 19:11:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:32,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:32,218 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:32,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:32,238 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:32,238 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:11:32,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:11:32,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:11:32,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:11:32,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:11:32,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:11:32,242 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:11:32,243 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:32,243 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:11:32,259 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:11:32,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-01-27 19:11:32,318 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-01-27 19:11:32,319 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:11:32,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-01-27 19:11:32,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 201 transitions, 446 flow [2023-01-27 19:11:32,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 201 transitions, 446 flow [2023-01-27 19:11:32,325 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:32,325 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 201 transitions, 446 flow [2023-01-27 19:11:32,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 201 transitions, 446 flow [2023-01-27 19:11:32,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 201 transitions, 446 flow [2023-01-27 19:11:32,375 INFO L130 PetriNetUnfolder]: 99/679 cut-off events. [2023-01-27 19:11:32,376 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:11:32,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 679 events. 99/679 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2925 event pairs, 6 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2023-01-27 19:11:32,393 INFO L119 LiptonReduction]: Number of co-enabled transitions 18320 [2023-01-27 19:11:35,750 INFO L134 LiptonReduction]: Checked pairs total: 32417 [2023-01-27 19:11:35,750 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-01-27 19:11:35,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:11:35,757 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;@5236867c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:11:35,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:11:35,760 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2023-01-27 19:11:35,760 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:11:35,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:35,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:11:35,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:11:35,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash -790134750, now seen corresponding path program 1 times [2023-01-27 19:11:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:35,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167032692] [2023-01-27 19:11:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:35,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167032692] [2023-01-27 19:11:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167032692] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:11:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:11:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:11:35,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872050585] [2023-01-27 19:11:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:11:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:11:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:11:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:11:35,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 373 [2023-01-27 19:11:35,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:35,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:35,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 373 [2023-01-27 19:11:35,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:46,905 INFO L130 PetriNetUnfolder]: 132302/183471 cut-off events. [2023-01-27 19:11:46,906 INFO L131 PetriNetUnfolder]: For 7370/7370 co-relation queries the response was YES. [2023-01-27 19:11:47,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364274 conditions, 183471 events. 132302/183471 cut-off events. For 7370/7370 co-relation queries the response was YES. Maximal size of possible extension queue 5167. Compared 1322902 event pairs, 58795 based on Foata normal form. 20324/171151 useless extension candidates. Maximal degree in co-relation 47736. Up to 113276 conditions per place. [2023-01-27 19:11:47,762 INFO L137 encePairwiseOnDemand]: 348/373 looper letters, 77 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2023-01-27 19:11:47,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 394 flow [2023-01-27 19:11:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:11:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:11:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-01-27 19:11:47,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308310991957105 [2023-01-27 19:11:47,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-01-27 19:11:47,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-01-27 19:11:47,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:47,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-01-27 19:11:47,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:47,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:47,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:47,769 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 186 flow. Second operand 3 states and 594 transitions. [2023-01-27 19:11:47,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 394 flow [2023-01-27 19:11:47,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:11:47,775 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 190 flow [2023-01-27 19:11:47,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-01-27 19:11:47,777 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-27 19:11:47,777 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 190 flow [2023-01-27 19:11:47,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:47,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:47,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:47,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:11:47,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:11:47,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1609168512, now seen corresponding path program 1 times [2023-01-27 19:11:47,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:47,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581613928] [2023-01-27 19:11:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:47,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:11:47,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581613928] [2023-01-27 19:11:47,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581613928] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:11:47,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666751146] [2023-01-27 19:11:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:47,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:11:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:11:47,833 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) [2023-01-27 19:11:47,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:11:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:11:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:11:47,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:11:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:47,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:11:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:11:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666751146] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:11:47,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:11:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:11:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216921922] [2023-01-27 19:11:47,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:11:47,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:11:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:11:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:11:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:11:47,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 373 [2023-01-27 19:11:47,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:47,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:11:47,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 373 [2023-01-27 19:11:47,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:11:57,333 INFO L130 PetriNetUnfolder]: 121992/168887 cut-off events. [2023-01-27 19:11:57,334 INFO L131 PetriNetUnfolder]: For 29796/29796 co-relation queries the response was YES. [2023-01-27 19:11:57,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370145 conditions, 168887 events. 121992/168887 cut-off events. For 29796/29796 co-relation queries the response was YES. Maximal size of possible extension queue 4832. Compared 1212095 event pairs, 21764 based on Foata normal form. 0/153825 useless extension candidates. Maximal degree in co-relation 84596. Up to 155017 conditions per place. [2023-01-27 19:11:58,244 INFO L137 encePairwiseOnDemand]: 369/373 looper letters, 96 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2023-01-27 19:11:58,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 502 flow [2023-01-27 19:11:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:11:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:11:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1069 transitions. [2023-01-27 19:11:58,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4776586237712243 [2023-01-27 19:11:58,249 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1069 transitions. [2023-01-27 19:11:58,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1069 transitions. [2023-01-27 19:11:58,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:11:58,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1069 transitions. [2023-01-27 19:11:58,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.16666666666666) internal successors, (1069), 6 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:58,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:58,257 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:58,258 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 190 flow. Second operand 6 states and 1069 transitions. [2023-01-27 19:11:58,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 502 flow [2023-01-27 19:11:58,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 19:11:58,309 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 224 flow [2023-01-27 19:11:58,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-01-27 19:11:58,309 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2023-01-27 19:11:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 224 flow [2023-01-27 19:11:58,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:11:58,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:11:58,310 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:11:58,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:11:58,514 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,SelfDestructingSolverStorable8 [2023-01-27 19:11:58,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 19:11:58,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:11:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1174682695, now seen corresponding path program 1 times [2023-01-27 19:11:58,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:11:58,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905712750] [2023-01-27 19:11:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:11:58,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:11:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:58,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:11:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:11:58,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:11:58,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:11:58,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:11:58,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:11:58,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:11:58,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:11:58,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:11:58,556 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:11:58,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:11:58,557 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:11:58,557 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:11:58,557 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:11:58,584 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:11:58,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 506 flow [2023-01-27 19:11:58,676 INFO L130 PetriNetUnfolder]: 161/1022 cut-off events. [2023-01-27 19:11:58,676 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:11:58,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 1022 events. 161/1022 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4919 event pairs, 23 based on Foata normal form. 0/872 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-01-27 19:11:58,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 223 transitions, 506 flow [2023-01-27 19:11:58,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 223 transitions, 506 flow [2023-01-27 19:11:58,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:11:58,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 223 transitions, 506 flow [2023-01-27 19:11:58,690 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 223 transitions, 506 flow [2023-01-27 19:11:58,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 506 flow [2023-01-27 19:11:58,777 INFO L130 PetriNetUnfolder]: 161/1022 cut-off events. [2023-01-27 19:11:58,778 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:11:58,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 1022 events. 161/1022 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4919 event pairs, 23 based on Foata normal form. 0/872 useless extension candidates. Maximal degree in co-relation 724. Up to 80 conditions per place. [2023-01-27 19:11:58,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 25200 [2023-01-27 19:12:01,900 INFO L134 LiptonReduction]: Checked pairs total: 46889 [2023-01-27 19:12:01,901 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-01-27 19:12:01,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:12:01,902 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;@5236867c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:12:01,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:12:01,904 INFO L130 PetriNetUnfolder]: 8/31 cut-off events. [2023-01-27 19:12:01,904 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:12:01,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:01,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 19:12:01,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:12:01,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -866863995, now seen corresponding path program 1 times [2023-01-27 19:12:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:01,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536732684] [2023-01-27 19:12:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:01,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:01,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536732684] [2023-01-27 19:12:01,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536732684] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:12:01,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:12:01,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:12:01,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740751399] [2023-01-27 19:12:01,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:12:01,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:12:01,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:12:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:12:01,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 411 [2023-01-27 19:12:01,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 83 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:12:01,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:01,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 411 [2023-01-27 19:12:01,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:04,761 INFO L130 PetriNetUnfolder]: 1236886/1576394 cut-off events. [2023-01-27 19:14:04,762 INFO L131 PetriNetUnfolder]: For 68908/68908 co-relation queries the response was YES. [2023-01-27 19:14:08,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163722 conditions, 1576394 events. 1236886/1576394 cut-off events. For 68908/68908 co-relation queries the response was YES. Maximal size of possible extension queue 29804. Compared 11035929 event pairs, 475757 based on Foata normal form. 151424/1450128 useless extension candidates. Maximal degree in co-relation 370168. Up to 1160270 conditions per place. [2023-01-27 19:14:15,516 INFO L137 encePairwiseOnDemand]: 384/411 looper letters, 81 selfloop transitions, 2 changer transitions 9/98 dead transitions. [2023-01-27 19:14:15,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 455 flow [2023-01-27 19:14:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:14:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:14:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-01-27 19:14:15,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296025952960259 [2023-01-27 19:14:15,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-01-27 19:14:15,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-01-27 19:14:15,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:15,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-01-27 19:14:15,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:15,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:15,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:15,542 INFO L175 Difference]: Start difference. First operand has 68 places, 83 transitions, 226 flow. Second operand 3 states and 653 transitions. [2023-01-27 19:14:15,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 455 flow [2023-01-27 19:14:15,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:14:15,569 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 206 flow [2023-01-27 19:14:15,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-01-27 19:14:15,570 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2023-01-27 19:14:15,570 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 206 flow [2023-01-27 19:14:15,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:15,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:15,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:14:15,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 19:14:15,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1905688617, now seen corresponding path program 1 times [2023-01-27 19:14:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767738523] [2023-01-27 19:14:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:15,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:15,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767738523] [2023-01-27 19:14:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767738523] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:14:15,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052049331] [2023-01-27 19:14:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:15,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:15,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:14:15,665 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) [2023-01-27 19:14:15,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:14:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:14:15,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:14:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:15,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:14:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:14:15,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052049331] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:14:15,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:14:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:14:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637999287] [2023-01-27 19:14:15,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:14:15,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:14:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:14:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:14:15,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 411 [2023-01-27 19:14:15,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:15,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:15,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 411 [2023-01-27 19:14:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand