./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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 ../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:03:53,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:03:53,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:03:54,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:03:54,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:03:54,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:03:54,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:03:54,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:03:54,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:03:54,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:03:54,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:03:54,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:03:54,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:03:54,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:03:54,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:03:54,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:03:54,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:03:54,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:03:54,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:03:54,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:03:54,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:03:54,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:03:54,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:03:54,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:03:54,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:03:54,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:03:54,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:03:54,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:03:54,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:03:54,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:03:54,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:03:54,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:03:54,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:03:54,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:03:54,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:03:54,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:03:54,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:03:54,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:03:54,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:03:54,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:03:54,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:03:54,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:03:54,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:03:54,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:03:54,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:03:54,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:03:54,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:03:54,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:03:54,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:03:54,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:03:54,077 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:03:54,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:03:54,077 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:03:54,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:03:54,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:03:54,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:03:54,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:03:54,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:03:54,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:03:54,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:03:54,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:03:54,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:03:54,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:03:54,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:03:54,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:03:54,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:03:54,080 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:03:54,080 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:03:54,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:03:54,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:03:54,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-12-15 11:03:54,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:03:54,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:03:54,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:03:54,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:03:54,330 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:03:54,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-12-15 11:03:54,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6859b613f/5a12c285ac3f4f6fb2d66711b4ef0d89/FLAG656b14596 [2021-12-15 11:03:54,815 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:03:54,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-12-15 11:03:54,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6859b613f/5a12c285ac3f4f6fb2d66711b4ef0d89/FLAG656b14596 [2021-12-15 11:03:55,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6859b613f/5a12c285ac3f4f6fb2d66711b4ef0d89 [2021-12-15 11:03:55,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:03:55,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:03:55,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:03:55,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:03:55,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:03:55,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b880ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55, skipping insertion in model container [2021-12-15 11:03:55,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:03:55,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:03:55,518 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-12-15 11:03:55,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:03:55,585 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:03:55,650 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-12-15 11:03:55,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:03:55,680 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:03:55,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55 WrapperNode [2021-12-15 11:03:55,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:03:55,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:03:55,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:03:55,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:03:55,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,746 INFO L137 Inliner]: procedures = 91, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 862 [2021-12-15 11:03:55,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:03:55,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:03:55,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:03:55,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:03:55,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:03:55,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:03:55,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:03:55,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:03:55,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (1/1) ... [2021-12-15 11:03:55,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:03:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:03:55,885 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) [2021-12-15 11:03:55,914 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 [2021-12-15 11:03:55,945 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-15 11:03:55,946 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-15 11:03:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:03:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-12-15 11:03:55,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-12-15 11:03:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-15 11:03:55,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-15 11:03:55,947 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-12-15 11:03:55,947 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-12-15 11:03:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-15 11:03:55,948 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-15 11:03:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-15 11:03:55,948 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-15 11:03:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-12-15 11:03:55,948 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-12-15 11:03:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-15 11:03:55,949 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-15 11:03:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-12-15 11:03:55,949 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-12-15 11:03:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-15 11:03:55,949 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-15 11:03:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-15 11:03:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-15 11:03:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-15 11:03:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-15 11:03:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-15 11:03:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-15 11:03:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-15 11:03:55,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-15 11:03:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-15 11:03:55,951 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-15 11:03:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-15 11:03:55,951 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-15 11:03:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-15 11:03:55,952 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-15 11:03:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-15 11:03:55,952 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-15 11:03:55,952 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-15 11:03:55,953 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-15 11:03:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-15 11:03:55,953 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-15 11:03:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:03:55,953 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-15 11:03:55,953 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-15 11:03:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-15 11:03:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-15 11:03:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-15 11:03:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-15 11:03:55,954 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-15 11:03:55,954 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-15 11:03:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:03:55,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:03:55,955 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-15 11:03:55,956 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-15 11:03:56,107 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:03:56,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:03:56,781 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:03:56,791 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:03:56,794 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 11:03:56,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:56 BoogieIcfgContainer [2021-12-15 11:03:56,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:03:56,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:03:56,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:03:56,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:03:56,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:03:55" (1/3) ... [2021-12-15 11:03:56,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ac94ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:56, skipping insertion in model container [2021-12-15 11:03:56,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:55" (2/3) ... [2021-12-15 11:03:56,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ac94ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:56, skipping insertion in model container [2021-12-15 11:03:56,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:56" (3/3) ... [2021-12-15 11:03:56,806 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2021-12-15 11:03:56,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:03:56,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:03:56,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:03:56,852 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:03:56,852 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:03:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 601 states, 474 states have (on average 1.6940928270042195) internal successors, (803), 492 states have internal predecessors, (803), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-15 11:03:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 11:03:56,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:03:56,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:03:56,920 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:03:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:03:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1730037928, now seen corresponding path program 1 times [2021-12-15 11:03:56,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:03:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512508176] [2021-12-15 11:03:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:03:56,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:03:56,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:03:56,983 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 11:03:56,990 INFO L158 Benchmark]: Toolchain (without parser) took 1853.74ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 69.0MB in the beginning and 78.8MB in the end (delta: -9.8MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2021-12-15 11:03:56,990 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:03:56,991 INFO L158 Benchmark]: CACSL2BoogieTranslator took 545.84ms. Allocated memory is still 109.1MB. Free memory was 68.8MB in the beginning and 57.3MB in the end (delta: 11.5MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-12-15 11:03:56,992 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.06ms. Allocated memory is still 109.1MB. Free memory was 57.3MB in the beginning and 52.0MB in the end (delta: 5.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:03:56,992 INFO L158 Benchmark]: Boogie Preprocessor took 100.22ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 52.0MB in the beginning and 109.5MB in the end (delta: -57.5MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-12-15 11:03:56,994 INFO L158 Benchmark]: RCFGBuilder took 947.44ms. Allocated memory is still 136.3MB. Free memory was 109.5MB in the beginning and 93.5MB in the end (delta: 15.9MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2021-12-15 11:03:56,997 INFO L158 Benchmark]: TraceAbstraction took 190.97ms. Allocated memory is still 136.3MB. Free memory was 93.5MB in the beginning and 78.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-15 11:03:57,002 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 88.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 545.84ms. Allocated memory is still 109.1MB. Free memory was 68.8MB in the beginning and 57.3MB in the end (delta: 11.5MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.06ms. Allocated memory is still 109.1MB. Free memory was 57.3MB in the beginning and 52.0MB in the end (delta: 5.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 100.22ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 52.0MB in the beginning and 109.5MB in the end (delta: -57.5MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * RCFGBuilder took 947.44ms. Allocated memory is still 136.3MB. Free memory was 109.5MB in the beginning and 93.5MB in the end (delta: 15.9MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. * TraceAbstraction took 190.97ms. Allocated memory is still 136.3MB. Free memory was 93.5MB in the beginning and 78.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:03:57,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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 ../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:03:58,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:03:58,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:03:58,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:03:58,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:03:58,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:03:58,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:03:58,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:03:58,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:03:58,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:03:58,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:03:58,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:03:58,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:03:58,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:03:58,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:03:58,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:03:58,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:03:58,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:03:58,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:03:58,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:03:58,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:03:58,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:03:58,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:03:58,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:03:58,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:03:58,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:03:58,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:03:58,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:03:58,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:03:58,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:03:58,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:03:58,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:03:58,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:03:58,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:03:58,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:03:58,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:03:58,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:03:58,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:03:58,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:03:58,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:03:58,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:03:58,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 11:03:58,810 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:03:58,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:03:58,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:03:58,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:03:58,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:03:58,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:03:58,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:03:58,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:03:58,814 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:03:58,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:03:58,815 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:03:58,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:03:58,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:03:58,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:03:58,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:03:58,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:03:58,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:03:58,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:03:58,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:03:58,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:03:58,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:03:58,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:03:58,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:03:58,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:03:58,822 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 11:03:58,822 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 11:03:58,823 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:03:58,823 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:03:58,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:03:58,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:03:58,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 11:03:58,823 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-12-15 11:03:59,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:03:59,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:03:59,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:03:59,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:03:59,118 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:03:59,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-12-15 11:03:59,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252bced5b/6dd20daedadd4106b12537885983dc85/FLAG69370a234 [2021-12-15 11:03:59,690 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:03:59,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-12-15 11:03:59,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252bced5b/6dd20daedadd4106b12537885983dc85/FLAG69370a234 [2021-12-15 11:04:00,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252bced5b/6dd20daedadd4106b12537885983dc85 [2021-12-15 11:04:00,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:04:00,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:04:00,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:04:00,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:04:00,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:04:00,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5c0088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00, skipping insertion in model container [2021-12-15 11:04:00,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:04:00,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:04:00,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-12-15 11:04:00,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:04:00,602 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-15 11:04:00,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:04:00,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-12-15 11:04:00,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:04:00,722 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:04:00,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-12-15 11:04:00,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:04:00,824 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:04:00,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00 WrapperNode [2021-12-15 11:04:00,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:04:00,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:04:00,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:04:00,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:04:00,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,882 INFO L137 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 810 [2021-12-15 11:04:00,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:04:00,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:04:00,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:04:00,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:04:00,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:04:00,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:04:00,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:04:00,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:04:00,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (1/1) ... [2021-12-15 11:04:00,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:04:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:04:01,000 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) [2021-12-15 11:04:01,039 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 [2021-12-15 11:04:01,055 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-15 11:04:01,056 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-15 11:04:01,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:04:01,056 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-12-15 11:04:01,056 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-12-15 11:04:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-15 11:04:01,057 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-15 11:04:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-12-15 11:04:01,057 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-12-15 11:04:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-15 11:04:01,057 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-15 11:04:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-15 11:04:01,057 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-15 11:04:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-12-15 11:04:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-12-15 11:04:01,058 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-15 11:04:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-15 11:04:01,058 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-12-15 11:04:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-12-15 11:04:01,058 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-15 11:04:01,058 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-15 11:04:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-15 11:04:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-15 11:04:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-15 11:04:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-15 11:04:01,059 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-15 11:04:01,059 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-15 11:04:01,060 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-15 11:04:01,060 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-15 11:04:01,060 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-15 11:04:01,060 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-15 11:04:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 11:04:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-15 11:04:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-15 11:04:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-15 11:04:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-15 11:04:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-15 11:04:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-15 11:04:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-15 11:04:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-15 11:04:01,062 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-15 11:04:01,062 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-15 11:04:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-15 11:04:01,063 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-15 11:04:01,063 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-15 11:04:01,063 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-15 11:04:01,064 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-15 11:04:01,064 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-15 11:04:01,064 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-15 11:04:01,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-15 11:04:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:04:01,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:04:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-15 11:04:01,066 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-15 11:04:01,203 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:04:01,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:04:01,997 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:04:02,009 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:04:02,009 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 11:04:02,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:04:02 BoogieIcfgContainer [2021-12-15 11:04:02,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:04:02,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:04:02,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:04:02,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:04:02,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:04:00" (1/3) ... [2021-12-15 11:04:02,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361f6757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:04:02, skipping insertion in model container [2021-12-15 11:04:02,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:04:00" (2/3) ... [2021-12-15 11:04:02,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361f6757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:04:02, skipping insertion in model container [2021-12-15 11:04:02,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:04:02" (3/3) ... [2021-12-15 11:04:02,023 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2021-12-15 11:04:02,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:04:02,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:04:02,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:04:02,061 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:04:02,061 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:04:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 601 states, 474 states have (on average 1.6940928270042195) internal successors, (803), 492 states have internal predecessors, (803), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-15 11:04:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 11:04:02,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:04:02,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:04:02,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:04:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:04:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1730037928, now seen corresponding path program 1 times [2021-12-15 11:04:02,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 11:04:02,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134446594] [2021-12-15 11:04:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:04:02,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 11:04:02,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 11:04:02,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 11:04:02,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 11:04:02,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 11:04:02,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 11:04:02,401 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 11:04:02,405 INFO L158 Benchmark]: Toolchain (without parser) took 2264.97ms. Allocated memory was 56.6MB in the beginning and 90.2MB in the end (delta: 33.6MB). Free memory was 32.7MB in the beginning and 47.2MB in the end (delta: -14.5MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. [2021-12-15 11:04:02,405 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 11:04:02,411 INFO L158 Benchmark]: CACSL2BoogieTranslator took 677.12ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 32.5MB in the beginning and 40.0MB in the end (delta: -7.5MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. [2021-12-15 11:04:02,412 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.80ms. Allocated memory is still 69.2MB. Free memory was 40.0MB in the beginning and 35.3MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-15 11:04:02,413 INFO L158 Benchmark]: Boogie Preprocessor took 73.51ms. Allocated memory is still 69.2MB. Free memory was 35.3MB in the beginning and 46.0MB in the end (delta: -10.7MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-12-15 11:04:02,417 INFO L158 Benchmark]: RCFGBuilder took 1060.00ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 46.0MB in the beginning and 63.1MB in the end (delta: -17.1MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2021-12-15 11:04:02,417 INFO L158 Benchmark]: TraceAbstraction took 384.25ms. Allocated memory is still 90.2MB. Free memory was 62.6MB in the beginning and 47.2MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-15 11:04:02,423 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 38.8MB in the beginning and 38.8MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 677.12ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 32.5MB in the beginning and 40.0MB in the end (delta: -7.5MB). Peak memory consumption was 15.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.80ms. Allocated memory is still 69.2MB. Free memory was 40.0MB in the beginning and 35.3MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.51ms. Allocated memory is still 69.2MB. Free memory was 35.3MB in the beginning and 46.0MB in the end (delta: -10.7MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * RCFGBuilder took 1060.00ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 46.0MB in the beginning and 63.1MB in the end (delta: -17.1MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. * TraceAbstraction took 384.25ms. Allocated memory is still 90.2MB. Free memory was 62.6MB in the beginning and 47.2MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 11:04:02,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable