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/ssh-simplified/s3_clnt_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-2989841 [2019-08-09 16:27:48,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-09 16:27:48,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-09 16:27:48,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-09 16:27:48,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-09 16:27:48,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-09 16:27:48,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-09 16:27:48,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-09 16:27:48,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-09 16:27:48,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-09 16:27:48,993 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-09 16:27:48,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-09 16:27:48,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-09 16:27:48,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-09 16:27:48,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-09 16:27:49,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-09 16:27:49,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-09 16:27:49,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-09 16:27:49,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-09 16:27:49,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-09 16:27:49,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-09 16:27:49,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-09 16:27:49,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-09 16:27:49,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-09 16:27:49,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-09 16:27:49,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-09 16:27:49,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-09 16:27:49,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-09 16:27:49,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-09 16:27:49,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-09 16:27:49,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-09 16:27:49,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-09 16:27:49,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-09 16:27:49,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-09 16:27:49,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-09 16:27:49,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-09 16:27:49,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-09 16:27:49,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-09 16:27:49,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-09 16:27:49,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-09 16:27:49,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-09 16:27:49,024 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 16:27:49,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-09 16:27:49,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-09 16:27:49,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-09 16:27:49,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-09 16:27:49,054 INFO L138 SettingsManager]: * Use SBE=true [2019-08-09 16:27:49,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-09 16:27:49,055 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-09 16:27:49,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-09 16:27:49,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-09 16:27:49,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-09 16:27:49,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-09 16:27:49,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-09 16:27:49,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-09 16:27:49,057 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-09 16:27:49,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-09 16:27:49,058 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-09 16:27:49,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-09 16:27:49,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-09 16:27:49,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-09 16:27:49,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-09 16:27:49,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-09 16:27:49,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-09 16:27:49,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-09 16:27:49,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-09 16:27:49,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-09 16:27:49,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-09 16:27:49,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-09 16:27:49,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-09 16:27:49,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-09 16:27:49,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-09 16:27:49,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-09 16:27:49,118 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-09 16:27:49,120 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-09 16:27:49,120 INFO L275 PluginConnector]: CDTParser initialized [2019-08-09 16:27:49,121 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_1.cil-2.c [2019-08-09 16:27:49,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b37575/e089ddb4e9524441b277d765c39fa182/FLAG2f6659df5 [2019-08-09 16:27:49,726 INFO L306 CDTParser]: Found 1 translation units. [2019-08-09 16:27:49,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_clnt_1.cil-2.c [2019-08-09 16:27:49,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b37575/e089ddb4e9524441b277d765c39fa182/FLAG2f6659df5 [2019-08-09 16:27:50,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89b37575/e089ddb4e9524441b277d765c39fa182 [2019-08-09 16:27:50,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-09 16:27:50,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-09 16:27:50,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-09 16:27:50,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-09 16:27:50,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-09 16:27:50,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79001829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50, skipping insertion in model container [2019-08-09 16:27:50,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,070 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-09 16:27:50,111 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-09 16:27:50,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:27:50,376 INFO L188 MainTranslator]: Completed pre-run [2019-08-09 16:27:50,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-09 16:27:50,550 INFO L192 MainTranslator]: Completed translation [2019-08-09 16:27:50,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50 WrapperNode [2019-08-09 16:27:50,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-09 16:27:50,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-09 16:27:50,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-09 16:27:50,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-09 16:27:50,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (1/1) ... [2019-08-09 16:27:50,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-09 16:27:50,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-09 16:27:50,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-09 16:27:50,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-09 16:27:50,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.08 04:27:50" (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 16:27:50,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-09 16:27:50,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-09 16:27:50,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_connect [2019-08-09 16:27:50,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-09 16:27:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-09 16:27:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-08-09 16:27:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-09 16:27:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-08-09 16:27:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-08-09 16:27:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_connect [2019-08-09 16:27:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-09 16:27:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-09 16:27:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-09 16:27:50,872 WARN L731 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-08-09 16:27:51,409 INFO L684 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2019-08-09 16:27:51,409 INFO L684 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2019-08-09 16:27:51,423 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-09 16:27:51,423 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-09 16:27:51,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:27:51 BoogieIcfgContainer [2019-08-09 16:27:51,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-09 16:27:51,425 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-09 16:27:51,425 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-09 16:27:51,426 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-09 16:27:51,427 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.08 04:27:51" (1/1) ... [2019-08-09 16:30:30,390 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-09 16:30:30,397 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-09 16:30:30,400 INFO L168 Benchmark]: Toolchain (without parser) took 160347.31 ms. Allocated memory was 132.6 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 87.1 MB in the beginning and 485.6 MB in the end (delta: -398.5 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2019-08-09 16:30:30,401 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory was 105.6 MB in the beginning and 105.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-09 16:30:30,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 498.37 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 86.9 MB in the beginning and 173.4 MB in the end (delta: -86.5 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2019-08-09 16:30:30,403 INFO L168 Benchmark]: Boogie Preprocessor took 70.19 ms. Allocated memory is still 199.8 MB. Free memory was 173.4 MB in the beginning and 170.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-08-09 16:30:30,404 INFO L168 Benchmark]: RCFGBuilder took 802.40 ms. Allocated memory is still 199.8 MB. Free memory was 170.9 MB in the beginning and 125.6 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2019-08-09 16:30:30,405 INFO L168 Benchmark]: Symbolic Interpretation took 158972.27 ms. Allocated memory was 199.8 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 125.6 MB in the beginning and 485.6 MB in the end (delta: -360.0 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. [2019-08-09 16:30:30,410 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 544]: 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 269465#(and (<= 0 (+ ssl3_connect_~ret~0 2147483648)) (= ssl3_connect_~blastFlag~0 4) (<= ssl3_connect_~ret~0 2147483647) (or (= ssl3_connect_~s__state~0 4432) (and (= ssl3_connect_~s__state~0 4433) (not (= ssl3_connect_~s__state~0 4432))))). Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory was 105.6 MB in the beginning and 105.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 498.37 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 86.9 MB in the beginning and 173.4 MB in the end (delta: -86.5 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.19 ms. Allocated memory is still 199.8 MB. Free memory was 173.4 MB in the beginning and 170.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 802.40 ms. Allocated memory is still 199.8 MB. Free memory was 170.9 MB in the beginning and 125.6 MB in the end (delta: 45.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 158972.27 ms. Allocated memory was 199.8 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 125.6 MB in the beginning and 485.6 MB in the end (delta: -360.0 MB). Peak memory consumption was 2.8 GB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...