java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/SifaC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-2989841 [2019-08-09 16:54:55,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-09 16:54:55,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-09 16:54:55,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-09 16:54:55,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-09 16:54:55,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-09 16:54:55,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-09 16:54:55,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-09 16:54:55,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-09 16:54:55,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-09 16:54:55,541 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-09 16:54:55,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-09 16:54:55,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-09 16:54:55,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-09 16:54:55,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-09 16:54:55,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-09 16:54:55,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-09 16:54:55,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-09 16:54:55,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-09 16:54:55,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-09 16:54:55,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-09 16:54:55,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-09 16:54:55,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-09 16:54:55,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-09 16:54:55,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-09 16:54:55,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-09 16:54:55,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-09 16:54:55,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-09 16:54:55,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-09 16:54:55,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-09 16:54:55,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-09 16:54:55,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-09 16:54:55,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-09 16:54:55,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-09 16:54:55,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-09 16:54:55,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-09 16:54:55,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-09 16:54:55,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-09 16:54:55,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-09 16:54:55,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-09 16:54:55,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-09 16:54:55,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-08-09 16:54:55,603 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-09 16:54:55,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-09 16:54:55,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-09 16:54:55,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-09 16:54:55,605 INFO L138 SettingsManager]: * Use SBE=true [2019-08-09 16:54:55,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-09 16:54:55,605 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-09 16:54:55,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-09 16:54:55,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-09 16:54:55,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-09 16:54:55,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-09 16:54:55,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-09 16:54:55,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-09 16:54:55,607 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-09 16:54:55,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-09 16:54:55,607 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-09 16:54:55,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-09 16:54:55,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-09 16:54:55,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-09 16:54:55,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-09 16:54:55,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-09 16:54:55,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-09 16:54:55,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-09 16:54:55,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-09 16:54:55,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-09 16:54:55,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-09 16:54:55,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-09 16:54:55,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-09 16:54:55,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-09 16:54:55,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-09 16:54:55,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-09 16:54:55,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-09 16:54:55,659 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-09 16:54:55,659 INFO L275 PluginConnector]: CDTParser initialized [2019-08-09 16:54:55,663 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label51.c [2019-08-09 16:54:55,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d46bb4d10/d19fb32f6bef45c78ac0e0908207fe9e/FLAG582fd7f71 [2019-08-09 16:54:56,491 INFO L306 CDTParser]: Found 1 translation units. [2019-08-09 16:54:56,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label51.c [2019-08-09 16:54:56,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d46bb4d10/d19fb32f6bef45c78ac0e0908207fe9e/FLAG582fd7f71 [2019-08-09 16:54:56,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d46bb4d10/d19fb32f6bef45c78ac0e0908207fe9e [2019-08-09 16:54:56,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-09 16:54:56,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-09 16:54:56,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-09 16:54:56,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-09 16:54:56,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-09 16:54:56,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:54:56" (1/1) ... [2019-08-09 16:54:56,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e21d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:56, skipping insertion in model container [2019-08-09 16:54:56,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:54:56" (1/1) ... [2019-08-09 16:54:56,608 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-09 16:54:56,781 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-09 16:54:58,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:54:58,392 INFO L188 MainTranslator]: Completed pre-run [2019-08-09 16:54:59,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:54:59,079 INFO L192 MainTranslator]: Completed translation [2019-08-09 16:54:59,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59 WrapperNode [2019-08-09 16:54:59,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-09 16:54:59,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-09 16:54:59,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-09 16:54:59,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-09 16:54:59,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... [2019-08-09 16:54:59,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-09 16:54:59,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-09 16:54:59,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-09 16:54:59,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-09 16:54:59,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:54:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-09 16:54:59,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-09 16:54:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-09 16:54:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-08-09 16:54:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-08-09 16:54:59,454 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-08-09 16:54:59,455 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-08-09 16:54:59,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-09 16:54:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-08-09 16:54:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-08-09 16:54:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-08-09 16:54:59,455 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-08-09 16:54:59,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-09 16:54:59,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-09 16:54:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-08-09 16:54:59,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-09 16:54:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-09 16:54:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-09 16:55:04,455 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-09 16:55:04,456 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-09 16:55:04,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:55:04 BoogieIcfgContainer [2019-08-09 16:55:04,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-09 16:55:04,464 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-09 16:55:04,464 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-09 16:55:04,465 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-09 16:55:04,466 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:55:04" (1/1) ... [2019-08-09 16:55:09,221 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-09 16:55:09,230 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-09 16:55:09,234 INFO L168 Benchmark]: Toolchain (without parser) took 12640.84 ms. Allocated memory was 137.9 MB in the beginning and 593.5 MB in the end (delta: 455.6 MB). Free memory was 72.2 MB in the beginning and 394.7 MB in the end (delta: -322.5 MB). Peak memory consumption was 401.4 MB. Max. memory is 7.1 GB. [2019-08-09 16:55:09,236 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-08-09 16:55:09,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2489.10 ms. Allocated memory was 137.9 MB in the beginning and 270.0 MB in the end (delta: 132.1 MB). Free memory was 72.0 MB in the beginning and 205.1 MB in the end (delta: -133.1 MB). Peak memory consumption was 107.7 MB. Max. memory is 7.1 GB. [2019-08-09 16:55:09,239 INFO L168 Benchmark]: Boogie Preprocessor took 287.78 ms. Allocated memory is still 270.0 MB. Free memory was 205.1 MB in the beginning and 175.6 MB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2019-08-09 16:55:09,242 INFO L168 Benchmark]: RCFGBuilder took 5093.92 ms. Allocated memory was 270.0 MB in the beginning and 431.0 MB in the end (delta: 161.0 MB). Free memory was 175.6 MB in the beginning and 327.9 MB in the end (delta: -152.3 MB). Peak memory consumption was 216.2 MB. Max. memory is 7.1 GB. [2019-08-09 16:55:09,243 INFO L168 Benchmark]: Symbolic Interpretation took 4766.17 ms. Allocated memory was 431.0 MB in the beginning and 593.5 MB in the end (delta: 162.5 MB). Free memory was 327.9 MB in the beginning and 394.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 364.0 MB. Max. memory is 7.1 GB. [2019-08-09 16:55:09,256 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 4718]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: Interpreter reached this location of interest. Location might be reachable. Predicate is 67417#(and (= 1 ~a1~0) (= 1 ~a3~0) (= ~a26~0 18) (= ~a28~0 17) (= ~a14~0 20) (not (= 1 ~a7~0)) (= ~a25~0 1) (= 16 ~a4~0)). Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2489.10 ms. Allocated memory was 137.9 MB in the beginning and 270.0 MB in the end (delta: 132.1 MB). Free memory was 72.0 MB in the beginning and 205.1 MB in the end (delta: -133.1 MB). Peak memory consumption was 107.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 287.78 ms. Allocated memory is still 270.0 MB. Free memory was 205.1 MB in the beginning and 175.6 MB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5093.92 ms. Allocated memory was 270.0 MB in the beginning and 431.0 MB in the end (delta: 161.0 MB). Free memory was 175.6 MB in the beginning and 327.9 MB in the end (delta: -152.3 MB). Peak memory consumption was 216.2 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 4766.17 ms. Allocated memory was 431.0 MB in the beginning and 593.5 MB in the end (delta: 162.5 MB). Free memory was 327.9 MB in the beginning and 394.7 MB in the end (delta: -66.8 MB). Peak memory consumption was 364.0 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...