./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-C-DAC/pthread-demo-datarace-1.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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 17:38:17,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 17:38:17,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 17:38:17,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 17:38:17,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 17:38:17,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 17:38:17,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 17:38:17,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 17:38:17,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 17:38:17,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 17:38:17,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 17:38:17,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 17:38:17,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 17:38:17,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 17:38:17,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 17:38:17,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 17:38:17,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 17:38:17,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 17:38:17,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 17:38:17,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 17:38:17,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 17:38:17,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 17:38:17,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 17:38:17,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 17:38:17,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 17:38:17,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 17:38:17,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 17:38:17,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 17:38:17,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 17:38:17,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 17:38:17,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 17:38:17,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 17:38:17,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 17:38:17,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 17:38:17,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 17:38:17,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 17:38:17,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 17:38:17,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 17:38:17,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 17:38:17,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 17:38:17,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 17:38:17,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 17:38:17,810 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 17:38:17,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 17:38:17,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 17:38:17,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 17:38:17,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 17:38:17,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 17:38:17,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 17:38:17,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 17:38:17,812 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 17:38:17,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 17:38:17,813 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 17:38:17,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 17:38:17,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 17:38:17,814 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 17:38:17,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 17:38:17,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 17:38:17,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 17:38:17,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 17:38:17,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:38:17,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 17:38:17,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 17:38:17,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 17:38:17,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 17:38:17,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 17:38:17,816 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 17:38:17,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 17:38:17,817 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 17:38:17,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 17:38:17,817 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 17:38:17,817 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 17:38:18,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 17:38:18,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 17:38:18,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 17:38:18,031 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 17:38:18,032 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 17:38:18,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-30 17:38:18,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 17:38:19,079 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 17:38:19,079 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-08-30 17:38:19,094 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd5ceff0/c9450558320f42b4ae0efab41ed1a329/FLAG14b9019fa [2023-08-30 17:38:19,103 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bd5ceff0/c9450558320f42b4ae0efab41ed1a329 [2023-08-30 17:38:19,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 17:38:19,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 17:38:19,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 17:38:19,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 17:38:19,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 17:38:19,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ae3646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19, skipping insertion in model container [2023-08-30 17:38:19,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 17:38:19,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 17:38:19,253 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-08-30 17:38:19,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:38:19,500 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 17:38:19,508 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-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-08-30 17:38:19,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 17:38:19,615 INFO L208 MainTranslator]: Completed translation [2023-08-30 17:38:19,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19 WrapperNode [2023-08-30 17:38:19,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 17:38:19,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 17:38:19,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 17:38:19,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 17:38:19,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,661 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2023-08-30 17:38:19,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 17:38:19,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 17:38:19,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 17:38:19,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 17:38:19,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 17:38:19,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 17:38:19,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 17:38:19,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 17:38:19,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (1/1) ... [2023-08-30 17:38:19,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 17:38:19,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:19,730 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 17:38:19,736 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 17:38:19,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 17:38:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 17:38:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 17:38:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 17:38:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 17:38:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 17:38:19,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-08-30 17:38:19,757 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-08-30 17:38:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 17:38:19,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 17:38:19,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 17:38:19,758 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 17:38:19,870 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 17:38:19,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 17:38:20,002 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 17:38:20,006 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 17:38:20,006 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 17:38:20,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:38:20 BoogieIcfgContainer [2023-08-30 17:38:20,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 17:38:20,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 17:38:20,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 17:38:20,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 17:38:20,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:38:19" (1/3) ... [2023-08-30 17:38:20,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20013c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:38:20, skipping insertion in model container [2023-08-30 17:38:20,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:38:19" (2/3) ... [2023-08-30 17:38:20,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20013c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:38:20, skipping insertion in model container [2023-08-30 17:38:20,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:38:20" (3/3) ... [2023-08-30 17:38:20,013 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-08-30 17:38:20,022 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 17:38:20,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 17:38:20,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 17:38:20,028 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 17:38:20,068 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 17:38:20,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2023-08-30 17:38:20,117 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2023-08-30 17:38:20,118 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:38:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-08-30 17:38:20,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2023-08-30 17:38:20,126 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2023-08-30 17:38:20,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 17:38:20,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2023-08-30 17:38:20,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2023-08-30 17:38:20,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2023-08-30 17:38:20,156 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-08-30 17:38:20,156 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:38:20,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-08-30 17:38:20,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 722 [2023-08-30 17:38:21,489 INFO L134 LiptonReduction]: Checked pairs total: 866 [2023-08-30 17:38:21,489 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-30 17:38:21,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 17:38:21,503 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;@7ff58d7e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 17:38:21,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 17:38:21,506 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 17:38:21,508 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:38:21,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:21,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:21,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:21,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1683658225, now seen corresponding path program 1 times [2023-08-30 17:38:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:21,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122130536] [2023-08-30 17:38:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:21,681 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 17:38:21,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:21,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122130536] [2023-08-30 17:38:21,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122130536] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:38:21,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:38:21,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 17:38:21,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381018274] [2023-08-30 17:38:21,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:38:21,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:38:21,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:38:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:38:21,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 154 [2023-08-30 17:38:21,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 17:38:21,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:21,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 154 [2023-08-30 17:38:21,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:21,765 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2023-08-30 17:38:21,766 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 17:38:21,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 205 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2023-08-30 17:38:21,768 INFO L137 encePairwiseOnDemand]: 151/154 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 17:38:21,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2023-08-30 17:38:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:38:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:38:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-08-30 17:38:21,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173160173160173 [2023-08-30 17:38:21,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-08-30 17:38:21,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-08-30 17:38:21,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:21,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-08-30 17:38:21,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 17:38:21,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 17:38:21,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 17:38:21,791 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 239 transitions. [2023-08-30 17:38:21,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2023-08-30 17:38:21,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 17:38:21,794 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2023-08-30 17:38:21,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-08-30 17:38:21,797 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-08-30 17:38:21,797 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2023-08-30 17:38:21,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 17:38:21,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:21,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 17:38:21,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:21,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1559967075, now seen corresponding path program 1 times [2023-08-30 17:38:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:21,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204533764] [2023-08-30 17:38:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:21,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204533764] [2023-08-30 17:38:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204533764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:38:21,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:38:21,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 17:38:21,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035829360] [2023-08-30 17:38:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:38:21,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:38:21,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:38:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:38:21,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-08-30 17:38:21,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 17:38:21,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:21,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-08-30 17:38:21,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:21,939 INFO L130 PetriNetUnfolder]: 61/143 cut-off events. [2023-08-30 17:38:21,939 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 17:38:21,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 486 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2023-08-30 17:38:21,940 INFO L137 encePairwiseOnDemand]: 151/154 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-30 17:38:21,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2023-08-30 17:38:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:38:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:38:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-30 17:38:21,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2023-08-30 17:38:21,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-30 17:38:21,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-30 17:38:21,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:21,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-30 17:38:21,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 17:38:21,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 17:38:21,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 17:38:21,945 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 236 transitions. [2023-08-30 17:38:21,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2023-08-30 17:38:21,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:38:21,945 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2023-08-30 17:38:21,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-08-30 17:38:21,946 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2023-08-30 17:38:21,946 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2023-08-30 17:38:21,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 17:38:21,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:21,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:21,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 17:38:21,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:21,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 517091689, now seen corresponding path program 1 times [2023-08-30 17:38:21,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:21,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41903540] [2023-08-30 17:38:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:21,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:22,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:22,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41903540] [2023-08-30 17:38:22,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41903540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:22,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880516577] [2023-08-30 17:38:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:22,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:22,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:22,016 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 17:38:22,053 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 17:38:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 17:38:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:22,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:22,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880516577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:22,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:22,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 17:38:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798131257] [2023-08-30 17:38:22,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 17:38:22,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 17:38:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 17:38:22,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 154 [2023-08-30 17:38:22,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:38:22,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:22,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 154 [2023-08-30 17:38:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:22,264 INFO L130 PetriNetUnfolder]: 111/264 cut-off events. [2023-08-30 17:38:22,264 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-08-30 17:38:22,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 930 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2023-08-30 17:38:22,268 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-08-30 17:38:22,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2023-08-30 17:38:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 17:38:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 17:38:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 468 transitions. [2023-08-30 17:38:22,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2023-08-30 17:38:22,272 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 468 transitions. [2023-08-30 17:38:22,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 468 transitions. [2023-08-30 17:38:22,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:22,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 468 transitions. [2023-08-30 17:38:22,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 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 17:38:22,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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 17:38:22,277 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 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 17:38:22,277 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 468 transitions. [2023-08-30 17:38:22,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2023-08-30 17:38:22,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:38:22,279 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2023-08-30 17:38:22,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-30 17:38:22,280 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2023-08-30 17:38:22,280 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2023-08-30 17:38:22,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 17:38:22,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:22,281 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:22,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 17:38:22,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:22,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:22,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:22,486 INFO L85 PathProgramCache]: Analyzing trace with hash 359100007, now seen corresponding path program 2 times [2023-08-30 17:38:22,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225243133] [2023-08-30 17:38:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-30 17:38:22,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:22,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225243133] [2023-08-30 17:38:22,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225243133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:22,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004112248] [2023-08-30 17:38:22,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 17:38:22,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:22,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:22,594 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 17:38:22,596 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 17:38:22,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 17:38:22,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:38:22,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 17:38:22,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:38:22,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 17:38:22,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004112248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:22,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:22,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-08-30 17:38:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490985028] [2023-08-30 17:38:22,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 17:38:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 17:38:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-30 17:38:22,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 154 [2023-08-30 17:38:22,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 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 17:38:22,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:22,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 154 [2023-08-30 17:38:22,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:23,192 INFO L130 PetriNetUnfolder]: 323/748 cut-off events. [2023-08-30 17:38:23,192 INFO L131 PetriNetUnfolder]: For 1511/1511 co-relation queries the response was YES. [2023-08-30 17:38:23,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 748 events. 323/748 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3110 event pairs, 10 based on Foata normal form. 107/855 useless extension candidates. Maximal degree in co-relation 588. Up to 168 conditions per place. [2023-08-30 17:38:23,199 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2023-08-30 17:38:23,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2023-08-30 17:38:23,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 17:38:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 17:38:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2500 transitions. [2023-08-30 17:38:23,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774637127578304 [2023-08-30 17:38:23,203 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2500 transitions. [2023-08-30 17:38:23,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2500 transitions. [2023-08-30 17:38:23,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:23,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2500 transitions. [2023-08-30 17:38:23,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.52941176470588) internal successors, (2500), 34 states have internal predecessors, (2500), 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 17:38:23,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 154.0) internal successors, (5390), 35 states have internal predecessors, (5390), 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 17:38:23,243 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 154.0) internal successors, (5390), 35 states have internal predecessors, (5390), 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 17:38:23,243 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 2500 transitions. [2023-08-30 17:38:23,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2023-08-30 17:38:23,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-08-30 17:38:23,251 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2023-08-30 17:38:23,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-08-30 17:38:23,253 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2023-08-30 17:38:23,253 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2023-08-30 17:38:23,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 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 17:38:23,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:23,254 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:23,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 17:38:23,460 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 [2023-08-30 17:38:23,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:23,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash -519767537, now seen corresponding path program 3 times [2023-08-30 17:38:23,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:23,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665202505] [2023-08-30 17:38:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-08-30 17:38:23,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:23,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665202505] [2023-08-30 17:38:23,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665202505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837474687] [2023-08-30 17:38:23,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 17:38:23,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:23,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:23,553 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) [2023-08-30 17:38:23,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 17:38:23,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 17:38:23,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:38:23,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 17:38:23,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-08-30 17:38:23,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-08-30 17:38:23,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837474687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:23,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:23,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-30 17:38:23,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845371506] [2023-08-30 17:38:23,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:23,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 17:38:23,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 17:38:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 17:38:23,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-08-30 17:38:23,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 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 17:38:23,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:23,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-08-30 17:38:23,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:23,950 INFO L130 PetriNetUnfolder]: 622/1299 cut-off events. [2023-08-30 17:38:23,950 INFO L131 PetriNetUnfolder]: For 19768/19770 co-relation queries the response was YES. [2023-08-30 17:38:23,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1299 events. 622/1299 cut-off events. For 19768/19770 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6285 event pairs, 78 based on Foata normal form. 94/1393 useless extension candidates. Maximal degree in co-relation 5480. Up to 324 conditions per place. [2023-08-30 17:38:23,959 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 128 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2023-08-30 17:38:23,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 167 transitions, 1986 flow [2023-08-30 17:38:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 17:38:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 17:38:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 631 transitions. [2023-08-30 17:38:23,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121753246753247 [2023-08-30 17:38:23,960 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 631 transitions. [2023-08-30 17:38:23,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 631 transitions. [2023-08-30 17:38:23,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:23,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 631 transitions. [2023-08-30 17:38:23,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 78.875) internal successors, (631), 8 states have internal predecessors, (631), 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 17:38:23,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 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 17:38:23,973 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 154.0) internal successors, (1386), 9 states have internal predecessors, (1386), 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 17:38:23,973 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 8 states and 631 transitions. [2023-08-30 17:38:23,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 167 transitions, 1986 flow [2023-08-30 17:38:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1900 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-30 17:38:24,008 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 860 flow [2023-08-30 17:38:24,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2023-08-30 17:38:24,009 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 76 predicate places. [2023-08-30 17:38:24,009 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 860 flow [2023-08-30 17:38:24,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 75.0) internal successors, (675), 9 states have internal predecessors, (675), 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 17:38:24,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:24,010 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:24,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 17:38:24,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:24,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:24,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:24,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1170256247, now seen corresponding path program 4 times [2023-08-30 17:38:24,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:24,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71538689] [2023-08-30 17:38:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:24,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-08-30 17:38:24,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71538689] [2023-08-30 17:38:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71538689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144070597] [2023-08-30 17:38:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 17:38:24,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:24,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:38:24,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 17:38:24,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 17:38:24,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:38:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 17:38:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-08-30 17:38:24,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-08-30 17:38:24,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144070597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:24,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:24,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-08-30 17:38:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424516771] [2023-08-30 17:38:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:24,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 17:38:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 17:38:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-30 17:38:24,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 154 [2023-08-30 17:38:24,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 860 flow. Second operand has 23 states, 23 states have (on average 72.65217391304348) internal successors, (1671), 23 states have internal predecessors, (1671), 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 17:38:24,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:24,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 154 [2023-08-30 17:38:24,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:25,402 INFO L130 PetriNetUnfolder]: 1162/2840 cut-off events. [2023-08-30 17:38:25,402 INFO L131 PetriNetUnfolder]: For 87720/87720 co-relation queries the response was YES. [2023-08-30 17:38:25,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13897 conditions, 2840 events. 1162/2840 cut-off events. For 87720/87720 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14961 event pairs, 61 based on Foata normal form. 270/3109 useless extension candidates. Maximal degree in co-relation 11881. Up to 594 conditions per place. [2023-08-30 17:38:25,424 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 327 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2023-08-30 17:38:25,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 394 transitions, 6238 flow [2023-08-30 17:38:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 17:38:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 17:38:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1723 transitions. [2023-08-30 17:38:25,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085596221959858 [2023-08-30 17:38:25,428 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1723 transitions. [2023-08-30 17:38:25,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1723 transitions. [2023-08-30 17:38:25,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:25,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1723 transitions. [2023-08-30 17:38:25,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.31818181818181) internal successors, (1723), 22 states have internal predecessors, (1723), 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 17:38:25,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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 17:38:25,435 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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 17:38:25,435 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 860 flow. Second operand 22 states and 1723 transitions. [2023-08-30 17:38:25,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 394 transitions, 6238 flow [2023-08-30 17:38:25,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 394 transitions, 5274 flow, removed 420 selfloop flow, removed 2 redundant places. [2023-08-30 17:38:25,497 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 1336 flow [2023-08-30 17:38:25,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1336, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2023-08-30 17:38:25,497 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 106 predicate places. [2023-08-30 17:38:25,498 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 1336 flow [2023-08-30 17:38:25,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 72.65217391304348) internal successors, (1671), 23 states have internal predecessors, (1671), 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 17:38:25,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:25,498 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:25,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 17:38:25,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:25,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:25,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:25,704 INFO L85 PathProgramCache]: Analyzing trace with hash -837674743, now seen corresponding path program 5 times [2023-08-30 17:38:25,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:25,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611852303] [2023-08-30 17:38:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:25,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-30 17:38:25,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611852303] [2023-08-30 17:38:25,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611852303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:25,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728079127] [2023-08-30 17:38:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 17:38:25,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:25,877 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:38:25,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 17:38:26,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-08-30 17:38:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:38:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 17:38:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-30 17:38:26,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-08-30 17:38:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728079127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:26,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:26,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-30 17:38:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788422752] [2023-08-30 17:38:26,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 17:38:26,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 17:38:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-08-30 17:38:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-08-30 17:38:26,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 1336 flow. Second operand has 17 states, 17 states have (on average 74.82352941176471) internal successors, (1272), 17 states have internal predecessors, (1272), 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 17:38:26,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:26,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-08-30 17:38:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:27,077 INFO L130 PetriNetUnfolder]: 2538/5271 cut-off events. [2023-08-30 17:38:27,077 INFO L131 PetriNetUnfolder]: For 98046/98048 co-relation queries the response was YES. [2023-08-30 17:38:27,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30779 conditions, 5271 events. 2538/5271 cut-off events. For 98046/98048 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 31846 event pairs, 198 based on Foata normal form. 346/5617 useless extension candidates. Maximal degree in co-relation 28711. Up to 1298 conditions per place. [2023-08-30 17:38:27,121 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 437 selfloop transitions, 46 changer transitions 0/484 dead transitions. [2023-08-30 17:38:27,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 484 transitions, 7162 flow [2023-08-30 17:38:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 17:38:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 17:38:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1267 transitions. [2023-08-30 17:38:27,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2023-08-30 17:38:27,124 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1267 transitions. [2023-08-30 17:38:27,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1267 transitions. [2023-08-30 17:38:27,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:27,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1267 transitions. [2023-08-30 17:38:27,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 79.1875) internal successors, (1267), 16 states have internal predecessors, (1267), 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 17:38:27,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 154.0) internal successors, (2618), 17 states have internal predecessors, (2618), 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 17:38:27,129 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 154.0) internal successors, (2618), 17 states have internal predecessors, (2618), 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 17:38:27,129 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 1336 flow. Second operand 16 states and 1267 transitions. [2023-08-30 17:38:27,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 484 transitions, 7162 flow [2023-08-30 17:38:27,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 484 transitions, 6892 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 17:38:27,211 INFO L231 Difference]: Finished difference. Result has 138 places, 128 transitions, 1588 flow [2023-08-30 17:38:27,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1588, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2023-08-30 17:38:27,212 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 121 predicate places. [2023-08-30 17:38:27,212 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 1588 flow [2023-08-30 17:38:27,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 74.82352941176471) internal successors, (1272), 17 states have internal predecessors, (1272), 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 17:38:27,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:27,212 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:27,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 17:38:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:27,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:27,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1128715209, now seen corresponding path program 6 times [2023-08-30 17:38:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:27,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24141504] [2023-08-30 17:38:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:27,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 320 proven. 378 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-08-30 17:38:27,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24141504] [2023-08-30 17:38:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24141504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703493761] [2023-08-30 17:38:27,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 17:38:27,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:27,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:38:27,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 17:38:28,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-08-30 17:38:28,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:38:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 17:38:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 320 proven. 378 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-08-30 17:38:28,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 320 proven. 378 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2023-08-30 17:38:28,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703493761] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:28,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:28,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-08-30 17:38:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364112336] [2023-08-30 17:38:28,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 17:38:28,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 17:38:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-08-30 17:38:28,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-08-30 17:38:28,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 1588 flow. Second operand has 23 states, 23 states have (on average 75.21739130434783) internal successors, (1730), 23 states have internal predecessors, (1730), 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 17:38:28,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:28,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-08-30 17:38:28,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:38:29,761 INFO L130 PetriNetUnfolder]: 3570/7335 cut-off events. [2023-08-30 17:38:29,761 INFO L131 PetriNetUnfolder]: For 168608/168610 co-relation queries the response was YES. [2023-08-30 17:38:29,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45389 conditions, 7335 events. 3570/7335 cut-off events. For 168608/168610 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 45296 event pairs, 198 based on Foata normal form. 260/7595 useless extension candidates. Maximal degree in co-relation 42529. Up to 1826 conditions per place. [2023-08-30 17:38:29,832 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 611 selfloop transitions, 52 changer transitions 0/664 dead transitions. [2023-08-30 17:38:29,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 664 transitions, 9734 flow [2023-08-30 17:38:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 17:38:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 17:38:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1739 transitions. [2023-08-30 17:38:29,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132821723730815 [2023-08-30 17:38:29,839 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1739 transitions. [2023-08-30 17:38:29,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1739 transitions. [2023-08-30 17:38:29,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:38:29,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1739 transitions. [2023-08-30 17:38:29,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.04545454545455) internal successors, (1739), 22 states have internal predecessors, (1739), 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 17:38:29,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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 17:38:29,848 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 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 17:38:29,848 INFO L175 Difference]: Start difference. First operand has 138 places, 128 transitions, 1588 flow. Second operand 22 states and 1739 transitions. [2023-08-30 17:38:29,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 664 transitions, 9734 flow [2023-08-30 17:38:29,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 664 transitions, 9674 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 17:38:29,986 INFO L231 Difference]: Finished difference. Result has 161 places, 135 transitions, 1826 flow [2023-08-30 17:38:29,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1826, PETRI_PLACES=161, PETRI_TRANSITIONS=135} [2023-08-30 17:38:29,987 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 144 predicate places. [2023-08-30 17:38:29,987 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 135 transitions, 1826 flow [2023-08-30 17:38:29,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 75.21739130434783) internal successors, (1730), 23 states have internal predecessors, (1730), 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 17:38:29,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:38:29,989 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:38:29,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 17:38:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:30,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:38:30,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:38:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash 172548031, now seen corresponding path program 7 times [2023-08-30 17:38:30,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:38:30,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86253621] [2023-08-30 17:38:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:38:30,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:38:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:33,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:38:33,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86253621] [2023-08-30 17:38:33,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86253621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:38:33,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075427875] [2023-08-30 17:38:33,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 17:38:33,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:38:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:38:33,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:38:33,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 17:38:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:38:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 17:38:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:38:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:33,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:38:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:38:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075427875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:38:34,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:38:34,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 17:38:34,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913396731] [2023-08-30 17:38:34,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:38:34,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 17:38:34,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:38:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 17:38:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 17:38:35,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2023-08-30 17:38:35,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 135 transitions, 1826 flow. Second operand has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 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 17:38:35,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:38:35,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2023-08-30 17:38:35,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:40:28,425 INFO L130 PetriNetUnfolder]: 111574/223171 cut-off events. [2023-08-30 17:40:28,426 INFO L131 PetriNetUnfolder]: For 8867754/8867754 co-relation queries the response was YES. [2023-08-30 17:40:31,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694039 conditions, 223171 events. 111574/223171 cut-off events. For 8867754/8867754 co-relation queries the response was YES. Maximal size of possible extension queue 1804. Compared 2322248 event pairs, 3065 based on Foata normal form. 1/223172 useless extension candidates. Maximal degree in co-relation 1681661. Up to 48711 conditions per place. [2023-08-30 17:40:32,704 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 10810 selfloop transitions, 1382 changer transitions 1/12193 dead transitions. [2023-08-30 17:40:32,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 12193 transitions, 219805 flow [2023-08-30 17:40:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 493 states. [2023-08-30 17:40:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2023-08-30 17:40:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 37878 transitions. [2023-08-30 17:40:32,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49890677274044415 [2023-08-30 17:40:32,748 INFO L72 ComplementDD]: Start complementDD. Operand 493 states and 37878 transitions. [2023-08-30 17:40:32,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 493 states and 37878 transitions. [2023-08-30 17:40:32,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:40:32,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 493 states and 37878 transitions. [2023-08-30 17:40:32,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 494 states, 493 states have (on average 76.8316430020284) internal successors, (37878), 493 states have internal predecessors, (37878), 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 17:40:32,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 494 states, 494 states have (on average 154.0) internal successors, (76076), 494 states have internal predecessors, (76076), 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 17:40:32,897 INFO L81 ComplementDD]: Finished complementDD. Result has 494 states, 494 states have (on average 154.0) internal successors, (76076), 494 states have internal predecessors, (76076), 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 17:40:32,898 INFO L175 Difference]: Start difference. First operand has 161 places, 135 transitions, 1826 flow. Second operand 493 states and 37878 transitions. [2023-08-30 17:40:32,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 12193 transitions, 219805 flow [2023-08-30 17:45:45,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 12193 transitions, 211235 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-08-30 17:45:45,486 INFO L231 Difference]: Finished difference. Result has 641 places, 1576 transitions, 7546 flow [2023-08-30 17:45:45,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=493, PETRI_FLOW=7546, PETRI_PLACES=641, PETRI_TRANSITIONS=1576} [2023-08-30 17:45:45,487 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 624 predicate places. [2023-08-30 17:45:45,488 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 1576 transitions, 7546 flow [2023-08-30 17:45:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 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 17:45:45,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:45:45,489 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:45:45,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 17:45:45,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:45:45,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:45:45,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:45:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1148916451, now seen corresponding path program 8 times [2023-08-30 17:45:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:45:45,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131587257] [2023-08-30 17:45:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:45:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:45:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:45:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2023-08-30 17:45:45,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:45:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131587257] [2023-08-30 17:45:45,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131587257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 17:45:45,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 17:45:45,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 17:45:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736727027] [2023-08-30 17:45:45,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 17:45:45,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 17:45:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:45:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 17:45:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 17:45:45,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 154 [2023-08-30 17:45:45,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 1576 transitions, 7546 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 17:45:45,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:45:45,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 154 [2023-08-30 17:45:45,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:45:53,236 INFO L130 PetriNetUnfolder]: 10744/35635 cut-off events. [2023-08-30 17:45:53,236 INFO L131 PetriNetUnfolder]: For 3230285/3230285 co-relation queries the response was YES. [2023-08-30 17:45:53,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353543 conditions, 35635 events. 10744/35635 cut-off events. For 3230285/3230285 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 399269 event pairs, 506 based on Foata normal form. 10012/45647 useless extension candidates. Maximal degree in co-relation 350101. Up to 23354 conditions per place. [2023-08-30 17:45:54,236 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 537 selfloop transitions, 112 changer transitions 0/1109 dead transitions. [2023-08-30 17:45:54,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1109 transitions, 7197 flow [2023-08-30 17:45:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 17:45:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 17:45:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-30 17:45:54,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2023-08-30 17:45:54,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-30 17:45:54,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-30 17:45:54,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:45:54,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-30 17:45:54,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 17:45:54,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 17:45:54,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 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 17:45:54,240 INFO L175 Difference]: Start difference. First operand has 641 places, 1576 transitions, 7546 flow. Second operand 3 states and 233 transitions. [2023-08-30 17:45:54,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1109 transitions, 7197 flow [2023-08-30 17:46:15,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1109 transitions, 7197 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 17:46:15,568 INFO L231 Difference]: Finished difference. Result has 612 places, 1094 transitions, 5842 flow [2023-08-30 17:46:15,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5618, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5842, PETRI_PLACES=612, PETRI_TRANSITIONS=1094} [2023-08-30 17:46:15,569 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 595 predicate places. [2023-08-30 17:46:15,569 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1094 transitions, 5842 flow [2023-08-30 17:46:15,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 17:46:15,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:46:15,570 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:46:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 17:46:15,570 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:46:15,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:46:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1655298021, now seen corresponding path program 9 times [2023-08-30 17:46:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:46:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119041363] [2023-08-30 17:46:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:46:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:46:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:46:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:18,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:46:18,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119041363] [2023-08-30 17:46:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119041363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:46:18,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806945215] [2023-08-30 17:46:18,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 17:46:18,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:46:18,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:46:18,222 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:46:18,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 17:46:18,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-08-30 17:46:18,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:46:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 17:46:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:46:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:19,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:46:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:46:19,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806945215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:46:19,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:46:19,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 17:46:19,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414654168] [2023-08-30 17:46:19,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:46:19,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 17:46:19,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:46:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 17:46:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 17:46:20,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2023-08-30 17:46:20,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1094 transitions, 5842 flow. Second operand has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 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 17:46:20,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:46:20,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2023-08-30 17:46:20,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:47:20,953 INFO L130 PetriNetUnfolder]: 19289/62900 cut-off events. [2023-08-30 17:47:20,953 INFO L131 PetriNetUnfolder]: For 5719220/5719220 co-relation queries the response was YES. [2023-08-30 17:47:21,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669763 conditions, 62900 events. 19289/62900 cut-off events. For 5719220/5719220 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 757935 event pairs, 6016 based on Foata normal form. 1/62901 useless extension candidates. Maximal degree in co-relation 664409. Up to 34273 conditions per place. [2023-08-30 17:47:21,827 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 4552 selfloop transitions, 1223 changer transitions 1/5776 dead transitions. [2023-08-30 17:47:21,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1031 places, 5776 transitions, 86231 flow [2023-08-30 17:47:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2023-08-30 17:47:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2023-08-30 17:47:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 31462 transitions. [2023-08-30 17:47:21,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48642547928262214 [2023-08-30 17:47:21,846 INFO L72 ComplementDD]: Start complementDD. Operand 420 states and 31462 transitions. [2023-08-30 17:47:21,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 420 states and 31462 transitions. [2023-08-30 17:47:21,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:47:21,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 420 states and 31462 transitions. [2023-08-30 17:47:21,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 421 states, 420 states have (on average 74.9095238095238) internal successors, (31462), 420 states have internal predecessors, (31462), 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 17:47:21,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 421 states, 421 states have (on average 154.0) internal successors, (64834), 421 states have internal predecessors, (64834), 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 17:47:21,948 INFO L81 ComplementDD]: Finished complementDD. Result has 421 states, 421 states have (on average 154.0) internal successors, (64834), 421 states have internal predecessors, (64834), 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 17:47:21,948 INFO L175 Difference]: Start difference. First operand has 612 places, 1094 transitions, 5842 flow. Second operand 420 states and 31462 transitions. [2023-08-30 17:47:21,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1031 places, 5776 transitions, 86231 flow [2023-08-30 17:47:48,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 5776 transitions, 83070 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 17:47:48,958 INFO L231 Difference]: Finished difference. Result has 1213 places, 2316 transitions, 15513 flow [2023-08-30 17:47:48,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=420, PETRI_FLOW=15513, PETRI_PLACES=1213, PETRI_TRANSITIONS=2316} [2023-08-30 17:47:48,959 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1196 predicate places. [2023-08-30 17:47:48,959 INFO L495 AbstractCegarLoop]: Abstraction has has 1213 places, 2316 transitions, 15513 flow [2023-08-30 17:47:48,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 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 17:47:48,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 17:47:48,960 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 17:47:48,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 17:47:49,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-30 17:47:49,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 17:47:49,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 17:47:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash -428446317, now seen corresponding path program 10 times [2023-08-30 17:47:49,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 17:47:49,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632835402] [2023-08-30 17:47:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 17:47:49,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 17:47:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 17:47:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:51,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 17:47:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632835402] [2023-08-30 17:47:51,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632835402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 17:47:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590701869] [2023-08-30 17:47:51,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 17:47:51,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 17:47:51,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 17:47:51,691 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 17:47:51,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 17:47:53,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 17:47:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 17:47:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 168 conjunts are in the unsatisfiable core [2023-08-30 17:47:53,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 17:47:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:53,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 17:47:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 17:47:53,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590701869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 17:47:53,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 17:47:53,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-08-30 17:47:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602188201] [2023-08-30 17:47:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 17:47:53,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-30 17:47:53,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 17:47:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-30 17:47:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-08-30 17:47:54,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 154 [2023-08-30 17:47:54,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1213 places, 2316 transitions, 15513 flow. Second operand has 63 states, 63 states have (on average 71.34920634920636) internal successors, (4495), 63 states have internal predecessors, (4495), 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 17:47:54,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 17:47:54,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 154 [2023-08-30 17:47:54,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 17:49:39,410 INFO L130 PetriNetUnfolder]: 30003/96779 cut-off events. [2023-08-30 17:49:39,411 INFO L131 PetriNetUnfolder]: For 9078908/9078908 co-relation queries the response was YES. [2023-08-30 17:49:46,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057194 conditions, 96779 events. 30003/96779 cut-off events. For 9078908/9078908 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 1250507 event pairs, 9582 based on Foata normal form. 1/96780 useless extension candidates. Maximal degree in co-relation 1056117. Up to 55932 conditions per place. [2023-08-30 17:49:47,001 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 5155 selfloop transitions, 1492 changer transitions 1/6648 dead transitions. [2023-08-30 17:49:47,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1608 places, 6648 transitions, 93682 flow [2023-08-30 17:49:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 396 states. [2023-08-30 17:49:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2023-08-30 17:49:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 29661 transitions. [2023-08-30 17:49:47,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48637347500983863 [2023-08-30 17:49:47,032 INFO L72 ComplementDD]: Start complementDD. Operand 396 states and 29661 transitions. [2023-08-30 17:49:47,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 29661 transitions. [2023-08-30 17:49:47,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 17:49:47,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 396 states and 29661 transitions. [2023-08-30 17:49:47,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 397 states, 396 states have (on average 74.90151515151516) internal successors, (29661), 396 states have internal predecessors, (29661), 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 17:49:47,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 397 states, 397 states have (on average 154.0) internal successors, (61138), 397 states have internal predecessors, (61138), 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 17:49:47,146 INFO L81 ComplementDD]: Finished complementDD. Result has 397 states, 397 states have (on average 154.0) internal successors, (61138), 397 states have internal predecessors, (61138), 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 17:49:47,146 INFO L175 Difference]: Start difference. First operand has 1213 places, 2316 transitions, 15513 flow. Second operand 396 states and 29661 transitions. [2023-08-30 17:49:47,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1608 places, 6648 transitions, 93682 flow Killed by 15