java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AbstractInterpretationC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:47:12,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:47:12,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:47:12,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:47:12,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:47:12,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:47:12,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:47:12,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:47:12,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:47:12,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:47:12,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:47:12,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:47:12,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:47:12,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:47:12,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:47:12,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:47:12,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:47:12,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:47:12,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:47:12,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:47:12,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:47:12,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:47:12,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:47:12,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:47:12,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:47:12,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:47:12,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:47:12,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:47:12,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:47:12,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:47:12,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:47:12,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:47:12,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:47:12,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:47:12,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:47:12,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:47:12,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:47:12,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:47:12,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:47:12,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:47:12,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:47:12,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:47:12,906 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:47:12,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:47:12,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:47:12,907 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:47:12,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:47:12,908 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:47:12,908 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:47:12,908 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:47:12,909 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:47:12,909 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:47:12,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:47:12,910 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:47:12,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:47:12,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:47:12,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:47:12,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:47:12,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:47:12,911 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:47:12,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:47:12,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:47:12,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:47:12,912 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:47:12,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:47:12,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:47:12,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:47:12,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:47:12,913 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:47:12,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:47:12,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:47:12,913 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:47:12,943 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:47:12,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:47:12,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:47:12,961 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:47:12,962 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:47:12,963 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2019-09-20 13:47:13,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a4d3d9d/9760956e08474fe5a9236ee4adc4d713/FLAGaacd9aa1c [2019-09-20 13:47:13,445 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:47:13,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2019-09-20 13:47:13,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a4d3d9d/9760956e08474fe5a9236ee4adc4d713/FLAGaacd9aa1c [2019-09-20 13:47:13,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a4d3d9d/9760956e08474fe5a9236ee4adc4d713 [2019-09-20 13:47:13,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:47:13,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:47:13,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:47:13,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:47:13,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:47:13,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:47:13" (1/1) ... [2019-09-20 13:47:13,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cf0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:13, skipping insertion in model container [2019-09-20 13:47:13,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:47:13" (1/1) ... [2019-09-20 13:47:13,833 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:47:13,848 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:47:14,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:47:14,049 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:47:14,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:47:14,079 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:47:14,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14 WrapperNode [2019-09-20 13:47:14,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:47:14,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:47:14,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:47:14,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:47:14,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:47:14,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:47:14,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:47:14,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:47:14,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:47:14" (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 [2019-09-20 13:47:14,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:47:14,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:47:14,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:47:14,283 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-09-20 13:47:14,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:47:14,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:47:14,283 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:47:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:47:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-20 13:47:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-09-20 13:47:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:47:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:47:14,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:47:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:47:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:47:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:47:14,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:47:14,579 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:47:14,582 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:47:14,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:47:14 BoogieIcfgContainer [2019-09-20 13:47:14,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:47:14,586 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-09-20 13:47:14,586 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-09-20 13:47:14,586 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-09-20 13:47:14,587 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:47:14" (1/1) ... [2019-09-20 13:47:14,637 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:47:14,720 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-20 13:47:14,744 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:47:14,749 INFO L272 AbstractInterpreter]: Visited 11 different actions 11 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 9. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 23 variables. [2019-09-20 13:47:14,750 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-09-20 13:47:14,753 INFO L168 Benchmark]: Toolchain (without parser) took 934.26 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 86.6 MB in the beginning and 154.8 MB in the end (delta: -68.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 13:47:14,754 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory is still 105.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 13:47:14,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.97 ms. Allocated memory is still 139.5 MB. Free memory was 86.6 MB in the beginning and 76.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:47:14,756 INFO L168 Benchmark]: Boogie Preprocessor took 138.20 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 76.6 MB in the beginning and 177.1 MB in the end (delta: -100.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:47:14,758 INFO L168 Benchmark]: RCFGBuilder took 366.33 ms. Allocated memory is still 200.3 MB. Free memory was 177.1 MB in the beginning and 161.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:47:14,759 INFO L168 Benchmark]: Abstract Interpretation took 164.25 ms. Allocated memory is still 200.3 MB. Free memory was 161.0 MB in the beginning and 154.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:47:14,763 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory is still 105.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.97 ms. Allocated memory is still 139.5 MB. Free memory was 86.6 MB in the beginning and 76.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.20 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 76.6 MB in the beginning and 177.1 MB in the end (delta: -100.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.33 ms. Allocated memory is still 200.3 MB. Free memory was 177.1 MB in the beginning and 161.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 164.25 ms. Allocated memory is still 200.3 MB. Free memory was 161.0 MB in the beginning and 154.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location RESULT: Ultimate proved your program to be correct! Received shutdown request...