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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-2989841 [2019-08-09 16:53:54,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-09 16:53:54,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-09 16:53:54,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-09 16:53:54,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-09 16:53:54,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-09 16:53:54,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-09 16:53:54,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-09 16:53:54,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-09 16:53:54,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-09 16:53:54,725 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-09 16:53:54,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-09 16:53:54,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-09 16:53:54,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-09 16:53:54,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-09 16:53:54,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-09 16:53:54,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-09 16:53:54,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-09 16:53:54,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-09 16:53:54,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-09 16:53:54,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-09 16:53:54,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-09 16:53:54,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-09 16:53:54,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-09 16:53:54,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-09 16:53:54,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-09 16:53:54,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-09 16:53:54,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-09 16:53:54,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-09 16:53:54,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-09 16:53:54,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-09 16:53:54,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-09 16:53:54,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-09 16:53:54,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-09 16:53:54,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-09 16:53:54,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-09 16:53:54,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-09 16:53:54,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-09 16:53:54,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-09 16:53:54,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-09 16:53:54,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-09 16:53:54,756 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 16:53:54,773 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-09 16:53:54,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-09 16:53:54,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-09 16:53:54,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-09 16:53:54,775 INFO L138 SettingsManager]: * Use SBE=true [2019-08-09 16:53:54,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-09 16:53:54,776 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-09 16:53:54,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-09 16:53:54,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-09 16:53:54,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-09 16:53:54,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-09 16:53:54,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-09 16:53:54,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-09 16:53:54,778 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-09 16:53:54,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-09 16:53:54,778 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-09 16:53:54,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-09 16:53:54,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-09 16:53:54,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-09 16:53:54,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-09 16:53:54,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-09 16:53:54,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-09 16:53:54,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-09 16:53:54,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-09 16:53:54,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-09 16:53:54,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-09 16:53:54,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-09 16:53:54,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-09 16:53:54,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-09 16:53:54,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-09 16:53:54,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-09 16:53:54,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-09 16:53:54,856 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-09 16:53:54,857 INFO L275 PluginConnector]: CDTParser initialized [2019-08-09 16:53:54,857 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label13.c [2019-08-09 16:53:54,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a76e6262d/ecd90f664ea5439baeb0a37b86a6062c/FLAG0d54ffc88 [2019-08-09 16:53:55,651 INFO L306 CDTParser]: Found 1 translation units. [2019-08-09 16:53:55,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label13.c [2019-08-09 16:53:55,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a76e6262d/ecd90f664ea5439baeb0a37b86a6062c/FLAG0d54ffc88 [2019-08-09 16:53:55,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a76e6262d/ecd90f664ea5439baeb0a37b86a6062c [2019-08-09 16:53:55,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-09 16:53:55,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-09 16:53:55,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-09 16:53:55,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-09 16:53:55,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-09 16:53:55,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:53:55" (1/1) ... [2019-08-09 16:53:55,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a93b692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:55, skipping insertion in model container [2019-08-09 16:53:55,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:53:55" (1/1) ... [2019-08-09 16:53:55,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-09 16:53:55,957 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-09 16:53:57,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:53:57,539 INFO L188 MainTranslator]: Completed pre-run [2019-08-09 16:53:58,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:53:58,187 INFO L192 MainTranslator]: Completed translation [2019-08-09 16:53:58,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58 WrapperNode [2019-08-09 16:53:58,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-09 16:53:58,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-09 16:53:58,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-09 16:53:58,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-09 16:53:58,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (1/1) ... [2019-08-09 16:53:58,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-09 16:53:58,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-09 16:53:58,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-09 16:53:58,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-09 16:53:58,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:53:58" (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 16:53:58,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-09 16:53:58,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-09 16:53:58,577 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-08-09 16:53:58,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-08-09 16:53:58,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-08-09 16:53:58,579 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-08-09 16:53:58,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-09 16:53:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-08-09 16:53:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-08-09 16:53:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-08-09 16:53:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-08-09 16:53:58,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-09 16:53:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-09 16:53:58,582 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-08-09 16:53:58,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-09 16:53:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-09 16:53:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-09 16:54:04,112 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-09 16:54:04,112 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-09 16:54:04,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:54:04 BoogieIcfgContainer [2019-08-09 16:54:04,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-09 16:54:04,116 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-09 16:54:04,116 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-09 16:54:04,117 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-09 16:54:04,118 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:54:04" (1/1) ... [2019-08-09 16:54:08,278 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-09 16:54:08,285 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-09 16:54:08,288 INFO L168 Benchmark]: Toolchain (without parser) took 12541.05 ms. Allocated memory was 133.2 MB in the beginning and 665.3 MB in the end (delta: 532.2 MB). Free memory was 72.6 MB in the beginning and 579.2 MB in the end (delta: -506.6 MB). Peak memory consumption was 570.7 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:08,289 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-08-09 16:54:08,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2440.97 ms. Allocated memory was 133.2 MB in the beginning and 292.6 MB in the end (delta: 159.4 MB). Free memory was 72.4 MB in the beginning and 173.7 MB in the end (delta: -101.3 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:08,291 INFO L168 Benchmark]: Boogie Preprocessor took 312.03 ms. Allocated memory is still 292.6 MB. Free memory was 173.7 MB in the beginning and 143.4 MB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:08,292 INFO L168 Benchmark]: RCFGBuilder took 5614.17 ms. Allocated memory was 292.6 MB in the beginning and 419.4 MB in the end (delta: 126.9 MB). Free memory was 143.4 MB in the beginning and 113.3 MB in the end (delta: 30.1 MB). Peak memory consumption was 199.6 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:08,293 INFO L168 Benchmark]: Symbolic Interpretation took 4169.37 ms. Allocated memory was 419.4 MB in the beginning and 665.3 MB in the end (delta: 245.9 MB). Free memory was 113.3 MB in the beginning and 579.2 MB in the end (delta: -465.9 MB). Peak memory consumption was 325.2 MB. Max. memory is 7.1 GB. [2019-08-09 16:54:08,298 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 4691]: 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 67525#(and (= 1 ~a7~0) (= 1 ~a1~0) (= ~a26~0 19) (= 1 ~a3~0) (= ~a14~0 20) (= ~a25~0 1) (= 16 ~a4~0) (= ~a28~0 15)). Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2440.97 ms. Allocated memory was 133.2 MB in the beginning and 292.6 MB in the end (delta: 159.4 MB). Free memory was 72.4 MB in the beginning and 173.7 MB in the end (delta: -101.3 MB). Peak memory consumption was 82.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 312.03 ms. Allocated memory is still 292.6 MB. Free memory was 173.7 MB in the beginning and 143.4 MB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5614.17 ms. Allocated memory was 292.6 MB in the beginning and 419.4 MB in the end (delta: 126.9 MB). Free memory was 143.4 MB in the beginning and 113.3 MB in the end (delta: 30.1 MB). Peak memory consumption was 199.6 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 4169.37 ms. Allocated memory was 419.4 MB in the beginning and 665.3 MB in the end (delta: 245.9 MB). Free memory was 113.3 MB in the beginning and 579.2 MB in the end (delta: -465.9 MB). Peak memory consumption was 325.2 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...