./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:35:55,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:35:55,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:35:55,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:35:55,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:35:55,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:35:55,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:35:55,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:35:55,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:35:55,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:35:55,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:35:55,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:35:55,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:35:55,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:35:55,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:35:55,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:35:55,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:35:55,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:35:55,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:35:55,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:35:55,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:35:55,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:35:55,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:35:55,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:35:55,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:35:55,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:35:55,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:35:55,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:35:55,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:35:55,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:35:55,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:35:55,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:35:55,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:35:55,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:35:55,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:35:55,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:35:55,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:35:55,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:35:55,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:35:55,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:35:55,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:35:55,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:35:55,680 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:35:55,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:35:55,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:35:55,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:35:55,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:35:55,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:35:55,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:35:55,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:35:55,683 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:35:55,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:35:55,684 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:35:55,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:35:55,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:35:55,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:35:55,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:35:55,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:35:55,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:35:55,686 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:35:55,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:35:55,686 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:35:55,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:35:55,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:35:55,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:35:55,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:35:55,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:35:55,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:35:55,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:35:55,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:35:55,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:35:55,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:35:55,688 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:35:55,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:35:55,689 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:35:55,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:35:55,689 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:35:55,689 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:35:55,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:35:56,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:35:56,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:35:56,010 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:35:56,010 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:35:56,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-08-30 23:35:57,210 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:35:57,538 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:35:57,540 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-08-30 23:35:57,563 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0167ab263/fdbdcd1768b54f83a0449deb70ae929e/FLAG3514703c6 [2023-08-30 23:35:57,575 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0167ab263/fdbdcd1768b54f83a0449deb70ae929e [2023-08-30 23:35:57,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:35:57,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:35:57,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:35:57,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:35:57,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:35:57,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:35:57" (1/1) ... [2023-08-30 23:35:57,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97b1268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:57, skipping insertion in model container [2023-08-30 23:35:57,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:35:57" (1/1) ... [2023-08-30 23:35:57,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:35:57,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:35:58,269 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] [2023-08-30 23:35:58,303 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] [2023-08-30 23:35:58,307 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] [2023-08-30 23:35:58,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:35:58,327 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:35:58,378 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] [2023-08-30 23:35:58,391 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] [2023-08-30 23:35:58,393 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] [2023-08-30 23:35:58,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:35:58,522 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:35:58,522 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:35:58,528 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:35:58,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58 WrapperNode [2023-08-30 23:35:58,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:35:58,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:35:58,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:35:58,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:35:58,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,667 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1831 [2023-08-30 23:35:58,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:35:58,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:35:58,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:35:58,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:35:58,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:35:58,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:35:58,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:35:58,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:35:58,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (1/1) ... [2023-08-30 23:35:58,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:35:58,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:35:58,798 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) [2023-08-30 23:35:58,829 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 [2023-08-30 23:35:58,844 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-08-30 23:35:58,844 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-08-30 23:35:58,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:35:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:35:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 23:35:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:35:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:35:58,848 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:35:59,172 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:35:59,182 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:36:00,777 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:36:01,115 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:36:01,115 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 23:36:01,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:36:01 BoogieIcfgContainer [2023-08-30 23:36:01,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:36:01,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:36:01,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:36:01,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:36:01,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:35:57" (1/3) ... [2023-08-30 23:36:01,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3549506e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:36:01, skipping insertion in model container [2023-08-30 23:36:01,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:35:58" (2/3) ... [2023-08-30 23:36:01,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3549506e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:36:01, skipping insertion in model container [2023-08-30 23:36:01,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:36:01" (3/3) ... [2023-08-30 23:36:01,125 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-08-30 23:36:01,133 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:36:01,140 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:36:01,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-30 23:36:01,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:36:01,353 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 23:36:01,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 23:36:02,223 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-08-30 23:36:02,224 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:36:02,256 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. [2023-08-30 23:36:02,257 INFO L82 GeneralOperation]: Start removeDead. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 23:36:02,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1516 places, 1583 transitions, 3174 flow [2023-08-30 23:36:02,281 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:36:02,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1516 places, 1583 transitions, 3174 flow [2023-08-30 23:36:02,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1516 places, 1583 transitions, 3174 flow [2023-08-30 23:36:02,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1516 places, 1583 transitions, 3174 flow [2023-08-30 23:36:02,926 INFO L130 PetriNetUnfolder]: 131/2943 cut-off events. [2023-08-30 23:36:02,926 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:36:02,951 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. [2023-08-30 23:36:03,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 382480 [2023-08-30 23:37:07,481 WARN L222 SmtUtils]: Spent 6.05s 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) [2023-08-30 23:37:16,055 WARN L222 SmtUtils]: Spent 5.16s 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) [2023-08-30 23:37:19,046 INFO L134 LiptonReduction]: Checked pairs total: 464451 [2023-08-30 23:37:19,046 INFO L136 LiptonReduction]: Total number of compositions: 1491 [2023-08-30 23:37:19,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:37:19,063 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=true, 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;@178e03e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:37:19,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:37:19,068 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-08-30 23:37:19,068 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:37:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:37:19,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:37:19,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:37:19,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:37:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1810728901, now seen corresponding path program 1 times [2023-08-30 23:37:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:37:19,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177399433] [2023-08-30 23:37:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:37:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:37:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:37:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:37:19,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:37:19,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177399433] [2023-08-30 23:37:19,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177399433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:37:19,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:37:19,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:37:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449203417] [2023-08-30 23:37:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:37:19,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:37:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:37:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:37:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:37:19,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1490 out of 3074 [2023-08-30 23:37:19,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 310 transitions, 628 flow. Second operand has 3 states, 3 states have (on average 1492.3333333333333) internal successors, (4477), 3 states have internal predecessors, (4477), 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) [2023-08-30 23:37:19,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:37:19,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1490 of 3074 [2023-08-30 23:37:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:37:23,516 INFO L130 PetriNetUnfolder]: 13558/24152 cut-off events. [2023-08-30 23:37:23,517 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 23:37:23,538 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. [2023-08-30 23:37:23,623 INFO L137 encePairwiseOnDemand]: 3057/3074 looper letters, 579 selfloop transitions, 14 changer transitions 4/601 dead transitions. [2023-08-30 23:37:23,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 601 transitions, 2404 flow [2023-08-30 23:37:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:37:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:37:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5077 transitions. [2023-08-30 23:37:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505313381045326 [2023-08-30 23:37:23,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5077 transitions. [2023-08-30 23:37:23,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5077 transitions. [2023-08-30 23:37:23,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:37:23,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5077 transitions. [2023-08-30 23:37:23,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1692.3333333333333) internal successors, (5077), 3 states have internal predecessors, (5077), 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) [2023-08-30 23:37:23,692 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) [2023-08-30 23:37:23,698 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) [2023-08-30 23:37:23,700 INFO L175 Difference]: Start difference. First operand has 265 places, 310 transitions, 628 flow. Second operand 3 states and 5077 transitions. [2023-08-30 23:37:23,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 601 transitions, 2404 flow [2023-08-30 23:37:23,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 601 transitions, 2404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:37:23,722 INFO L231 Difference]: Finished difference. Result has 268 places, 312 transitions, 686 flow [2023-08-30 23:37:23,726 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=686, PETRI_PLACES=268, PETRI_TRANSITIONS=312} [2023-08-30 23:37:23,729 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, 3 predicate places. [2023-08-30 23:37:23,730 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 312 transitions, 686 flow [2023-08-30 23:37:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1492.3333333333333) internal successors, (4477), 3 states have internal predecessors, (4477), 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) [2023-08-30 23:37:23,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:37:23,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:37:23,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:37:23,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:37:23,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:37:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2056143509, now seen corresponding path program 1 times [2023-08-30 23:37:23,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:37:23,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287954524] [2023-08-30 23:37:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:37:23,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:37:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:37:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:37:23,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:37:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287954524] [2023-08-30 23:37:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287954524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:37:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925177343] [2023-08-30 23:37:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:37:23,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:37:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:37:23,869 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) [2023-08-30 23:37:23,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 23:37:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:37:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 23:37:24,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:37:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:37:24,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:37:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 23:37:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925177343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:37:24,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:37:24,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 23:37:24,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977903824] [2023-08-30 23:37:24,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:37:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 23:37:24,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:37:24,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 23:37:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 23:37:24,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1484 out of 3074 [2023-08-30 23:37:24,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 312 transitions, 686 flow. Second operand has 7 states, 7 states have (on average 1485.5714285714287) internal successors, (10399), 7 states have internal predecessors, (10399), 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) [2023-08-30 23:37:24,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:37:24,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1484 of 3074 [2023-08-30 23:37:24,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:37:24,368 INFO L130 PetriNetUnfolder]: 57/138 cut-off events. [2023-08-30 23:37:24,368 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-30 23:37:24,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 138 events. 57/138 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 19 based on Foata normal form. 26/152 useless extension candidates. Maximal degree in co-relation 295. Up to 99 conditions per place. [2023-08-30 23:37:24,369 INFO L137 encePairwiseOnDemand]: 3069/3074 looper letters, 56 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2023-08-30 23:37:24,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 281 flow [2023-08-30 23:37:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 23:37:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 23:37:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8971 transitions. [2023-08-30 23:37:24,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863912383430926 [2023-08-30 23:37:24,402 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8971 transitions. [2023-08-30 23:37:24,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8971 transitions. [2023-08-30 23:37:24,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:37:24,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8971 transitions. [2023-08-30 23:37:24,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1495.1666666666667) internal successors, (8971), 6 states have internal predecessors, (8971), 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) [2023-08-30 23:37:24,448 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) [2023-08-30 23:37:24,458 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) [2023-08-30 23:37:24,458 INFO L175 Difference]: Start difference. First operand has 268 places, 312 transitions, 686 flow. Second operand 6 states and 8971 transitions. [2023-08-30 23:37:24,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 281 flow [2023-08-30 23:37:24,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:37:24,460 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 113 flow [2023-08-30 23:37:24,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3074, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=113, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-30 23:37:24,461 INFO L281 CegarLoopForPetriNet]: 265 programPoint places, -226 predicate places. [2023-08-30 23:37:24,461 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 113 flow [2023-08-30 23:37:24,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1485.5714285714287) internal successors, (10399), 7 states have internal predecessors, (10399), 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) [2023-08-30 23:37:24,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:37:24,467 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-30 23:37:24,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 23:37:24,673 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 [2023-08-30 23:37:24,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:37:24,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:37:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1098724703, now seen corresponding path program 2 times [2023-08-30 23:37:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:37:24,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079557025] [2023-08-30 23:37:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:37:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:37:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:37:24,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:37:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:37:24,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:37:24,860 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:37:24,861 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:37:24,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:37:24,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 23:37:24,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:37:24,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:37:24,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:37:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:37:24,864 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-30 23:37:24,867 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:37:24,867 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:37:24,970 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 23:37:24,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-08-30 23:37:26,248 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-08-30 23:37:26,248 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 23:37:26,336 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. [2023-08-30 23:37:26,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1725 transitions, 3468 flow [2023-08-30 23:37:26,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1725 transitions, 3468 flow [2023-08-30 23:37:26,358 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:37:26,358 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-08-30 23:37:26,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1725 transitions, 3468 flow [2023-08-30 23:37:26,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1725 transitions, 3468 flow [2023-08-30 23:37:27,393 INFO L130 PetriNetUnfolder]: 204/4488 cut-off events. [2023-08-30 23:37:27,393 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 23:37:27,447 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. [2023-08-30 23:37:27,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 807240 [2023-08-30 23:38:44,766 WARN L222 SmtUtils]: Spent 6.98s on a formula simplification. DAG size of input: 227 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 23:38:54,969 WARN L222 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 227 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-30 23:38:58,311 INFO L134 LiptonReduction]: Checked pairs total: 972072 [2023-08-30 23:38:58,314 INFO L136 LiptonReduction]: Total number of compositions: 1622 [2023-08-30 23:38:58,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:38:58,325 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@178e03e4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:38:58,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:38:58,329 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2023-08-30 23:38:58,329 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:38:58,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:38:58,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:38:58,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:38:58,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:38:58,330 INFO L85 PathProgramCache]: Analyzing trace with hash 321816523, now seen corresponding path program 1 times [2023-08-30 23:38:58,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:38:58,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403707406] [2023-08-30 23:38:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:38:58,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:38:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:38:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:38:58,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:38:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403707406] [2023-08-30 23:38:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403707406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:38:58,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:38:58,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:38:58,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698141838] [2023-08-30 23:38:58,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:38:58,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:38:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:38:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:38:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:38:58,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1625 out of 3347 [2023-08-30 23:38:58,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 340 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 1627.3333333333333) internal successors, (4882), 3 states have internal predecessors, (4882), 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) [2023-08-30 23:38:58,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:38:58,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1625 of 3347 [2023-08-30 23:38:58,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:40:26,274 INFO L130 PetriNetUnfolder]: 642182/916878 cut-off events. [2023-08-30 23:40:26,274 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 23:40:27,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830234 conditions, 916878 events. 642182/916878 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 4033. Compared 6648056 event pairs, 253759 based on Foata normal form. 2400/777221 useless extension candidates. Maximal degree in co-relation 1768531. Up to 459165 conditions per place. [2023-08-30 23:40:29,858 INFO L137 encePairwiseOnDemand]: 3330/3347 looper letters, 636 selfloop transitions, 14 changer transitions 5/661 dead transitions. [2023-08-30 23:40:29,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 661 transitions, 2656 flow [2023-08-30 23:40:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:40:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:40:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5540 transitions. [2023-08-30 23:40:29,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551737874713674 [2023-08-30 23:40:29,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5540 transitions. [2023-08-30 23:40:29,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5540 transitions. [2023-08-30 23:40:29,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:40:29,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5540 transitions. [2023-08-30 23:40:29,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1846.6666666666667) internal successors, (5540), 3 states have internal predecessors, (5540), 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) [2023-08-30 23:40:29,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3347.0) internal successors, (13388), 4 states have internal predecessors, (13388), 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) [2023-08-30 23:40:29,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3347.0) internal successors, (13388), 4 states have internal predecessors, (13388), 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) [2023-08-30 23:40:29,896 INFO L175 Difference]: Start difference. First operand has 292 places, 340 transitions, 698 flow. Second operand 3 states and 5540 transitions. [2023-08-30 23:40:29,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 661 transitions, 2656 flow [2023-08-30 23:40:29,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 661 transitions, 2656 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:40:29,906 INFO L231 Difference]: Finished difference. Result has 295 places, 343 transitions, 762 flow [2023-08-30 23:40:29,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3347, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=292, 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=762, PETRI_PLACES=295, PETRI_TRANSITIONS=343} [2023-08-30 23:40:29,908 INFO L281 CegarLoopForPetriNet]: 292 programPoint places, 3 predicate places. [2023-08-30 23:40:29,908 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 343 transitions, 762 flow [2023-08-30 23:40:29,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1627.3333333333333) internal successors, (4882), 3 states have internal predecessors, (4882), 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) [2023-08-30 23:40:29,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:40:29,909 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 23:40:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:40:29,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:40:29,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:40:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash 921172357, now seen corresponding path program 1 times [2023-08-30 23:40:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:40:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669196646] [2023-08-30 23:40:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:40:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:40:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:40:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:40:30,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:40:30,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669196646] [2023-08-30 23:40:30,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669196646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 23:40:30,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866772581] [2023-08-30 23:40:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:40:30,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 23:40:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:40:30,029 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) [2023-08-30 23:40:30,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 23:40:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:40:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 23:40:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 23:40:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:40:30,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 23:40:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-30 23:40:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866772581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 23:40:30,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 23:40:30,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 23:40:30,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145061436] [2023-08-30 23:40:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 23:40:30,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 23:40:30,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:40:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 23:40:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 23:40:30,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1619 out of 3347 [2023-08-30 23:40:30,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 343 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 1620.7142857142858) internal successors, (11345), 7 states have internal predecessors, (11345), 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) [2023-08-30 23:40:30,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:40:30,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1619 of 3347 [2023-08-30 23:40:30,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand