/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:08:50,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:08:50,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:08:50,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:08:50,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:08:50,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:08:50,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:08:50,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:08:50,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:08:50,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:08:50,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:08:50,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:08:50,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:08:50,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:08:50,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:08:50,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:08:50,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:08:50,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:08:50,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:08:50,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:08:50,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:08:50,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:08:50,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:08:50,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:08:50,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 07:08:50,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 07:08:50,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 07:08:50,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 07:08:50,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 07:08:50,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 07:08:50,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:08:50,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:08:50,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:08:50,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:08:50,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:08:50,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:08:50,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:08:50,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:08:50,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:08:50,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:08:50,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:08:50,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 07:08:50,452 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:08:50,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:08:50,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:08:50,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:08:50,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:08:50,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:08:50,453 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:08:50,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:08:50,453 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:08:50,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:08:50,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:08:50,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:08:50,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:08:50,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:08:50,455 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:08:50,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:08:50,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:08:50,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:08:50,681 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:08:50,681 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:08:50,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-01-28 07:08:51,725 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:08:51,994 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:08:51,994 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-01-28 07:08:52,013 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec530092/5aef00c3703349a98e7848b171180358/FLAG78d7c4e8c [2023-01-28 07:08:52,021 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec530092/5aef00c3703349a98e7848b171180358 [2023-01-28 07:08:52,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:08:52,024 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:08:52,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:08:52,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:08:52,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:08:52,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd1aaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52, skipping insertion in model container [2023-01-28 07:08:52,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:08:52,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:08:52,476 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-01-28 07:08:52,507 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-01-28 07:08:52,510 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-01-28 07:08:52,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:08:52,537 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:08:52,605 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-01-28 07:08:52,629 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-01-28 07:08:52,631 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-01-28 07:08:52,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:08:52,717 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:08:52,718 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 07:08:52,722 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:08:52,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52 WrapperNode [2023-01-28 07:08:52,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:08:52,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:08:52,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:08:52,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:08:52,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,823 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1831 [2023-01-28 07:08:52,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:08:52,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:08:52,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:08:52,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:08:52,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:08:52,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:08:52,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:08:52,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:08:52,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (1/1) ... [2023-01-28 07:08:52,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:08:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:08:52,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 07:08:52,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:08:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-01-28 07:08:52,993 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:08:52,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:08:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:08:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-01-28 07:08:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:08:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:08:52,996 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:08:53,332 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:08:53,334 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:08:54,523 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:08:54,720 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:08:54,721 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-28 07:08:54,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:08:54 BoogieIcfgContainer [2023-01-28 07:08:54,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:08:54,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:08:54,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:08:54,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:08:54,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:08:52" (1/3) ... [2023-01-28 07:08:54,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5594ca2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:08:54, skipping insertion in model container [2023-01-28 07:08:54,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:08:52" (2/3) ... [2023-01-28 07:08:54,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5594ca2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:08:54, skipping insertion in model container [2023-01-28 07:08:54,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:08:54" (3/3) ... [2023-01-28 07:08:54,729 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-01-28 07:08:54,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:08:54,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-01-28 07:08:54,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:08:54,837 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:08:54,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:08:55,467 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-01-28 07:08:55,467 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:08:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-01-28 07:08:55,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:08:55,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:08:55,521 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:08:55,535 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:08:55,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:08:55,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:08:55,952 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-01-28 07:08:55,953 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:08:55,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-01-28 07:08:56,054 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-01-28 07:09:53,697 WARN L222 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 238 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 07:10:02,457 WARN L222 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 238 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 07:10:05,447 INFO L134 LiptonReduction]: Checked pairs total: 464451 [2023-01-28 07:10:05,447 INFO L136 LiptonReduction]: Total number of compositions: 1491 [2023-01-28 07:10:05,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:10:05,464 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;@663d3ca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:10:05,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 07:10:05,481 INFO L130 PetriNetUnfolder]: 2/27 cut-off events. [2023-01-28 07:10:05,481 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:10:05,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:10:05,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:10:05,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:10:05,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:10:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1810728901, now seen corresponding path program 1 times [2023-01-28 07:10:05,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:10:05,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751900488] [2023-01-28 07:10:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:10:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:10:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:10:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:10:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:10:05,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751900488] [2023-01-28 07:10:05,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751900488] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:10:05,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:10:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:10:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281558844] [2023-01-28 07:10:05,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:10:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:10:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:10:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:10:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:10:05,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1472 out of 3074 [2023-01-28 07:10:05,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 310 transitions, 628 flow. Second operand has 3 states, 3 states have (on average 1474.3333333333333) internal successors, (4423), 3 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:05,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:10:05,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1472 of 3074 [2023-01-28 07:10:05,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:10:08,837 INFO L130 PetriNetUnfolder]: 13558/24152 cut-off events. [2023-01-28 07:10:08,837 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:10:08,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48216 conditions, 24152 events. 13558/24152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 148243 event pairs, 4994 based on Foata normal form. 46/20372 useless extension candidates. Maximal degree in co-relation 48134. Up to 12075 conditions per place. [2023-01-28 07:10:08,930 INFO L137 encePairwiseOnDemand]: 3057/3074 looper letters, 578 selfloop transitions, 14 changer transitions 6/601 dead transitions. [2023-01-28 07:10:08,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 601 transitions, 2404 flow [2023-01-28 07:10:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:10:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:10:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5023 transitions. [2023-01-28 07:10:08,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446757753198872 [2023-01-28 07:10:08,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5023 transitions. [2023-01-28 07:10:08,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5023 transitions. [2023-01-28 07:10:08,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:10:08,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5023 transitions. [2023-01-28 07:10:08,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1674.3333333333333) internal successors, (5023), 3 states have internal predecessors, (5023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:08,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3074.0) internal successors, (12296), 4 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:08,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3074.0) internal successors, (12296), 4 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:08,992 INFO L175 Difference]: Start difference. First operand has 265 places, 310 transitions, 628 flow. Second operand 3 states and 5023 transitions. [2023-01-28 07:10:08,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 601 transitions, 2404 flow [2023-01-28 07:10:09,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 601 transitions, 2404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:10:09,008 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 682 flow [2023-01-28 07:10:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3074, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=682, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2023-01-28 07:10:09,013 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, 3 predicate places. [2023-01-28 07:10:09,013 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 682 flow [2023-01-28 07:10:09,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1474.3333333333333) internal successors, (4423), 3 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:09,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:10:09,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:10:09,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:10:09,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:10:09,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:10:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash -908627305, now seen corresponding path program 1 times [2023-01-28 07:10:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:10:09,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831071119] [2023-01-28 07:10:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:10:09,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:10:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:10:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:10:09,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:10:09,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831071119] [2023-01-28 07:10:09,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831071119] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:10:09,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80894309] [2023-01-28 07:10:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:10:09,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:10:09,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:10:09,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:10:09,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:10:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:10:09,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:10:09,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:10:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:10:09,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:10:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:10:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80894309] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:10:09,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:10:09,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:10:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028184767] [2023-01-28 07:10:09,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:10:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:10:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:10:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:10:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:10:09,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1472 out of 3074 [2023-01-28 07:10:09,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 1477.7142857142858) internal successors, (10344), 7 states have internal predecessors, (10344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:09,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:10:09,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1472 of 3074 [2023-01-28 07:10:09,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:10:09,612 INFO L130 PetriNetUnfolder]: 57/134 cut-off events. [2023-01-28 07:10:09,612 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-01-28 07:10:09,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 134 events. 57/134 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 273 event pairs, 19 based on Foata normal form. 26/148 useless extension candidates. Maximal degree in co-relation 295. Up to 99 conditions per place. [2023-01-28 07:10:09,613 INFO L137 encePairwiseOnDemand]: 3069/3074 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-01-28 07:10:09,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 64 transitions, 277 flow [2023-01-28 07:10:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:10:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:10:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8899 transitions. [2023-01-28 07:10:09,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48248752981999565 [2023-01-28 07:10:09,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8899 transitions. [2023-01-28 07:10:09,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8899 transitions. [2023-01-28 07:10:09,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:10:09,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8899 transitions. [2023-01-28 07:10:09,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1483.1666666666667) internal successors, (8899), 6 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:09,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3074.0) internal successors, (21518), 7 states have internal predecessors, (21518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:09,667 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3074.0) internal successors, (21518), 7 states have internal predecessors, (21518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:09,667 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 682 flow. Second operand 6 states and 8899 transitions. [2023-01-28 07:10:09,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 64 transitions, 277 flow [2023-01-28 07:10:09,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 64 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:10:09,668 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-01-28 07:10:09,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3074, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-01-28 07:10:09,669 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, -227 predicate places. [2023-01-28 07:10:09,669 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-01-28 07:10:09,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1477.7142857142858) internal successors, (10344), 7 states have internal predecessors, (10344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:10:09,673 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-01-28 07:10:09,674 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-28 07:10:09,674 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-28 07:10:09,674 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-28 07:10:09,674 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-28 07:10:09,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 07:10:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:10:09,880 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:10:09,882 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 07:10:09,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:10:10,318 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-01-28 07:10:10,318 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:10:10,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 2943 events. 131/2943 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14098 event pairs, 0 based on Foata normal form. 0/2799 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-01-28 07:10:10,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-01-28 07:10:10,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1512 places, 1578 transitions, 3161 flow [2023-01-28 07:10:10,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:10:10,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-01-28 07:10:10,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1512 places, 1578 transitions, 3161 flow [2023-01-28 07:10:10,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1512 places, 1578 transitions, 3161 flow [2023-01-28 07:10:10,766 INFO L130 PetriNetUnfolder]: 130/2938 cut-off events. [2023-01-28 07:10:10,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:10:10,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 2938 events. 130/2938 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14037 event pairs, 0 based on Foata normal form. 0/2794 useless extension candidates. Maximal degree in co-relation 1505. Up to 6 conditions per place. [2023-01-28 07:10:10,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-01-28 07:11:09,347 WARN L222 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 232 DAG size of output: 223 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 07:11:19,819 INFO L134 LiptonReduction]: Checked pairs total: 470527 [2023-01-28 07:11:19,819 INFO L136 LiptonReduction]: Total number of compositions: 1497 [2023-01-28 07:11:19,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:11:19,821 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;@663d3ca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:11:19,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:11:19,824 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-01-28 07:11:19,824 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:11:19,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:11:19,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 07:11:19,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:11:19,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:11:19,824 INFO L85 PathProgramCache]: Analyzing trace with hash 966382152, now seen corresponding path program 1 times [2023-01-28 07:11:19,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:11:19,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778996269] [2023-01-28 07:11:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:11:19,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:11:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:11:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:11:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:11:19,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778996269] [2023-01-28 07:11:19,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778996269] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:11:19,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:11:19,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:11:19,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993739772] [2023-01-28 07:11:19,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:11:19,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:11:19,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:11:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:11:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:11:19,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1472 out of 3080 [2023-01-28 07:11:19,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 312 transitions, 629 flow. Second operand has 3 states, 3 states have (on average 1473.6666666666667) internal successors, (4421), 3 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:19,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:11:19,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1472 of 3080 [2023-01-28 07:11:19,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:11:23,010 INFO L130 PetriNetUnfolder]: 15259/26838 cut-off events. [2023-01-28 07:11:23,010 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:11:23,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53581 conditions, 26838 events. 15259/26838 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 163138 event pairs, 5472 based on Foata normal form. 50/22322 useless extension candidates. Maximal degree in co-relation 53514. Up to 13444 conditions per place. [2023-01-28 07:11:23,055 INFO L137 encePairwiseOnDemand]: 3067/3080 looper letters, 62 selfloop transitions, 4 changer transitions 537/604 dead transitions. [2023-01-28 07:11:23,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 604 transitions, 2415 flow [2023-01-28 07:11:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:11:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:11:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5025 transitions. [2023-01-28 07:11:23,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438311688311688 [2023-01-28 07:11:23,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5025 transitions. [2023-01-28 07:11:23,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5025 transitions. [2023-01-28 07:11:23,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:11:23,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5025 transitions. [2023-01-28 07:11:23,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1675.0) internal successors, (5025), 3 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3080.0) internal successors, (12320), 4 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3080.0) internal successors, (12320), 4 states have internal predecessors, (12320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,168 INFO L175 Difference]: Start difference. First operand has 266 places, 312 transitions, 629 flow. Second operand 3 states and 5025 transitions. [2023-01-28 07:11:23,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 604 transitions, 2415 flow [2023-01-28 07:11:23,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 604 transitions, 2415 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:11:23,174 INFO L231 Difference]: Finished difference. Result has 266 places, 37 transitions, 93 flow [2023-01-28 07:11:23,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3080, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=266, PETRI_TRANSITIONS=37} [2023-01-28 07:11:23,177 INFO L281 CegarLoopForPetriNet]: 266 programPoint places, 0 predicate places. [2023-01-28 07:11:23,177 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 37 transitions, 93 flow [2023-01-28 07:11:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1473.6666666666667) internal successors, (4421), 3 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:11:23,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 07:11:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:11:23,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:11:23,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:11:23,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1754499281, now seen corresponding path program 1 times [2023-01-28 07:11:23,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:11:23,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424363894] [2023-01-28 07:11:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:11:23,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:11:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:11:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:11:23,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:11:23,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424363894] [2023-01-28 07:11:23,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424363894] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:11:23,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096628934] [2023-01-28 07:11:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:11:23,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:11:23,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:11:23,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:11:23,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:11:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:11:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:11:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:11:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:11:23,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:11:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 07:11:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096628934] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:11:23,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:11:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:11:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485444042] [2023-01-28 07:11:23,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:11:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:11:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:11:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:11:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:11:23,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1472 out of 3080 [2023-01-28 07:11:23,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 37 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 1473.5714285714287) internal successors, (10315), 7 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:11:23,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1472 of 3080 [2023-01-28 07:11:23,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:11:23,597 INFO L130 PetriNetUnfolder]: 64/171 cut-off events. [2023-01-28 07:11:23,597 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-01-28 07:11:23,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 171 events. 64/171 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 534 event pairs, 0 based on Foata normal form. 3/159 useless extension candidates. Maximal degree in co-relation 324. Up to 109 conditions per place. [2023-01-28 07:11:23,598 INFO L137 encePairwiseOnDemand]: 3076/3080 looper letters, 62 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2023-01-28 07:11:23,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 70 transitions, 303 flow [2023-01-28 07:11:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:11:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:11:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8904 transitions. [2023-01-28 07:11:23,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2023-01-28 07:11:23,610 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8904 transitions. [2023-01-28 07:11:23,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8904 transitions. [2023-01-28 07:11:23,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:11:23,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8904 transitions. [2023-01-28 07:11:23,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1484.0) internal successors, (8904), 6 states have internal predecessors, (8904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3080.0) internal successors, (21560), 7 states have internal predecessors, (21560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,641 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3080.0) internal successors, (21560), 7 states have internal predecessors, (21560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,641 INFO L175 Difference]: Start difference. First operand has 266 places, 37 transitions, 93 flow. Second operand 6 states and 8904 transitions. [2023-01-28 07:11:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 70 transitions, 303 flow [2023-01-28 07:11:23,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:11:23,643 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 117 flow [2023-01-28 07:11:23,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3080, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-01-28 07:11:23,644 INFO L281 CegarLoopForPetriNet]: 266 programPoint places, -226 predicate places. [2023-01-28 07:11:23,644 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 117 flow [2023-01-28 07:11:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1473.5714285714287) internal successors, (10315), 7 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:11:23,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:11:23,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 07:11:23,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 07:11:23,850 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,SelfDestructingSolverStorable3 [2023-01-28 07:11:23,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:11:23,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:11:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 93826184, now seen corresponding path program 2 times [2023-01-28 07:11:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:11:23,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500229982] [2023-01-28 07:11:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:11:23,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:11:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:11:23,925 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:11:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:11:23,991 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:11:23,992 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:11:23,993 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:11:23,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 07:11:23,993 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-01-28 07:11:23,994 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:11:23,994 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:11:23,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:11:24,061 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:11:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 07:11:24,941 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-01-28 07:11:24,941 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:11:24,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-01-28 07:11:24,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 07:11:25,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-01-28 07:11:25,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:11:25,032 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-01-28 07:11:25,032 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-01-28 07:11:25,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-01-28 07:11:25,811 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-01-28 07:11:25,812 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:11:25,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4502 conditions, 4488 events. 204/4488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26614 event pairs, 0 based on Foata normal form. 0/4264 useless extension candidates. Maximal degree in co-relation 2945. Up to 9 conditions per place. [2023-01-28 07:11:26,031 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-01-28 07:12:38,859 WARN L222 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 07:12:49,139 WARN L222 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 214 DAG size of output: 209 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-01-28 07:12:52,516 INFO L134 LiptonReduction]: Checked pairs total: 1019905 [2023-01-28 07:12:52,516 INFO L136 LiptonReduction]: Total number of compositions: 1619 [2023-01-28 07:12:52,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:12:52,542 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;@663d3ca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:12:52,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 07:12:52,545 INFO L130 PetriNetUnfolder]: 2/27 cut-off events. [2023-01-28 07:12:52,545 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:12:52,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:12:52,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:12:52,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:12:52,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:12:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash 475578972, now seen corresponding path program 1 times [2023-01-28 07:12:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:12:52,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395052924] [2023-01-28 07:12:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:12:52,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:12:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:12:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:12:52,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:12:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395052924] [2023-01-28 07:12:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395052924] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:12:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:12:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:12:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398700860] [2023-01-28 07:12:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:12:52,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:12:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:12:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:12:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:12:52,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3344 [2023-01-28 07:12:52,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 340 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 1609.3333333333333) internal successors, (4828), 3 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:12:52,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:12:52,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3344 [2023-01-28 07:12:52,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:14:17,138 INFO L130 PetriNetUnfolder]: 646028/919524 cut-off events. [2023-01-28 07:14:17,138 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-01-28 07:14:18,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835526 conditions, 919524 events. 646028/919524 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 4074. Compared 6638257 event pairs, 254886 based on Foata normal form. 2400/778275 useless extension candidates. Maximal degree in co-relation 1773715. Up to 460488 conditions per place. [2023-01-28 07:14:20,726 INFO L137 encePairwiseOnDemand]: 3327/3344 looper letters, 636 selfloop transitions, 14 changer transitions 6/661 dead transitions. [2023-01-28 07:14:20,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 661 transitions, 2656 flow [2023-01-28 07:14:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:14:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:14:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5486 transitions. [2023-01-28 07:14:20,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468500797448166 [2023-01-28 07:14:20,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5486 transitions. [2023-01-28 07:14:20,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5486 transitions. [2023-01-28 07:14:20,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:14:20,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5486 transitions. [2023-01-28 07:14:20,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1828.6666666666667) internal successors, (5486), 3 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:14:20,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3344.0) internal successors, (13376), 4 states have internal predecessors, (13376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:14:20,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3344.0) internal successors, (13376), 4 states have internal predecessors, (13376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:14:20,755 INFO L175 Difference]: Start difference. First operand has 291 places, 340 transitions, 698 flow. Second operand 3 states and 5486 transitions. [2023-01-28 07:14:20,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 661 transitions, 2656 flow [2023-01-28 07:14:20,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 661 transitions, 2656 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:14:20,764 INFO L231 Difference]: Finished difference. Result has 294 places, 342 transitions, 756 flow [2023-01-28 07:14:20,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3344, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=756, PETRI_PLACES=294, PETRI_TRANSITIONS=342} [2023-01-28 07:14:20,766 INFO L281 CegarLoopForPetriNet]: 291 programPoint places, 3 predicate places. [2023-01-28 07:14:20,766 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 342 transitions, 756 flow [2023-01-28 07:14:20,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1609.3333333333333) internal successors, (4828), 3 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:14:20,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:14:20,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:14:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:14:20,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-28 07:14:20,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:14:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1430036538, now seen corresponding path program 1 times [2023-01-28 07:14:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:14:20,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890627910] [2023-01-28 07:14:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:14:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:14:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:14:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:14:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:14:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890627910] [2023-01-28 07:14:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890627910] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:14:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360230315] [2023-01-28 07:14:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:14:20,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:14:20,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:14:20,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:14:20,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:14:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:14:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:14:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:14:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:14:21,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:14:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 07:14:21,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360230315] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:14:21,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:14:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:14:21,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069074850] [2023-01-28 07:14:21,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:14:21,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:14:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:14:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:14:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:14:21,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1607 out of 3344 [2023-01-28 07:14:21,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 342 transitions, 756 flow. Second operand has 7 states, 7 states have (on average 1612.7142857142858) internal successors, (11289), 7 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:14:21,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:14:21,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1607 of 3344 [2023-01-28 07:14:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand