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/loop-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:27:08,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:27:08,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:27:08,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:27:08,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:27:08,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:27:08,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:27:08,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:27:08,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:27:08,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:27:08,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:27:08,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:27:08,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:27:08,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:27:08,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:27:08,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:27:08,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:27:08,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:27:08,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:27:08,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:27:08,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:27:08,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:27:08,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:27:08,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:27:08,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-03 21:27:08,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-03 21:27:08,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-03 21:27:08,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-03 21:27:08,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-03 21:27:08,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-03 21:27:08,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:27:08,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:27:08,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:27:08,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:27:08,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:27:08,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:27:08,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:27:08,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 21:27:08,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 21:27:08,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 21:27:08,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 21:27:08,947 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 [2019-09-03 21:27:08,962 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:27:08,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:27:08,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:27:08,963 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:27:08,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:27:08,964 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:27:08,964 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:27:08,964 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:27:08,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:27:08,964 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:27:08,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:27:08,965 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:27:08,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:27:08,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:27:08,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:27:08,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:27:08,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:27:08,967 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:27:08,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:27:08,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:27:08,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:27:08,968 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:27:08,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:27:08,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:27:08,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:27:08,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:27:08,969 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:27:08,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:27:08,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:27:08,969 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:27:09,002 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:27:09,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:27:09,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:27:09,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:27:09,022 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:27:09,023 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2019-09-03 21:27:09,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23b7460c/6698eec7f2a04445a04b8f2dbb00dde9/FLAG6c9093c4f [2019-09-03 21:27:09,611 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:27:09,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2019-09-03 21:27:09,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23b7460c/6698eec7f2a04445a04b8f2dbb00dde9/FLAG6c9093c4f [2019-09-03 21:27:09,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23b7460c/6698eec7f2a04445a04b8f2dbb00dde9 [2019-09-03 21:27:10,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:27:10,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:27:10,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:27:10,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:27:10,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:27:10,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:27:09" (1/1) ... [2019-09-03 21:27:10,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dc0faf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10, skipping insertion in model container [2019-09-03 21:27:10,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:27:09" (1/1) ... [2019-09-03 21:27:10,025 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:27:10,044 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:27:10,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:27:10,259 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:27:10,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:27:10,292 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:27:10,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10 WrapperNode [2019-09-03 21:27:10,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:27:10,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:27:10,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:27:10,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:27:10,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:27:10,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:27:10,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:27:10,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:27:10,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:27:10" (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 [2019-09-03 21:27:10,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:27:10,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:27:10,500 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:27:10,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:27:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:27:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:27:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:27:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:27:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:27:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:27:10,719 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:27:10,720 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:27:10,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:27:10 BoogieIcfgContainer [2019-09-03 21:27:10,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:27:10,723 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-09-03 21:27:10,723 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-09-03 21:27:10,724 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-09-03 21:27:10,725 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:27:10" (1/1) ... [2019-09-03 21:27:10,762 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:27:10,839 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-03 21:27:11,321 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:27:11,348 INFO L272 AbstractInterpreter]: Visited 29 different actions 44 times. Merged at 9 different actions 9 times. Never widened. Performed 79 root evaluator evaluations with a maximum evaluation depth of 15. Performed 79 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 9 fixpoints after 6 different actions. Largest state had 5 variables. [2019-09-03 21:27:11,348 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-09-03 21:27:11,354 INFO L168 Benchmark]: Toolchain (without parser) took 1343.11 ms. Allocated memory was 141.0 MB in the beginning and 228.1 MB in the end (delta: 87.0 MB). Free memory was 88.1 MB in the beginning and 171.6 MB in the end (delta: -83.4 MB). Peak memory consumption was 70.3 MB. Max. memory is 7.1 GB. [2019-09-03 21:27:11,356 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 107.1 MB in the beginning and 106.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:27:11,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.78 ms. Allocated memory is still 141.0 MB. Free memory was 87.9 MB in the beginning and 78.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-03 21:27:11,360 INFO L168 Benchmark]: Boogie Preprocessor took 146.69 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 78.6 MB in the beginning and 177.5 MB in the end (delta: -99.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-03 21:27:11,363 INFO L168 Benchmark]: RCFGBuilder took 281.10 ms. Allocated memory is still 200.8 MB. Free memory was 177.5 MB in the beginning and 165.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:27:11,365 INFO L168 Benchmark]: Abstract Interpretation took 625.93 ms. Allocated memory was 200.8 MB in the beginning and 228.1 MB in the end (delta: 27.3 MB). Free memory was 165.7 MB in the beginning and 171.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 88.1 MB. Max. memory is 7.1 GB. [2019-09-03 21:27:11,381 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 107.1 MB in the beginning and 106.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.78 ms. Allocated memory is still 141.0 MB. Free memory was 87.9 MB in the beginning and 78.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.69 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 78.6 MB in the beginning and 177.5 MB in the end (delta: -99.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.10 ms. Allocated memory is still 200.8 MB. Free memory was 177.5 MB in the beginning and 165.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 625.93 ms. Allocated memory was 200.8 MB in the beginning and 228.1 MB in the end (delta: 27.3 MB). Free memory was 165.7 MB in the beginning and 171.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 88.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: abstract domain could reach this error location. Possible FailurePath: [L13] unsigned int x; [L14] unsigned int y = 1; [L16] COND TRUE __VERIFIER_nondet_int() [L17] COND TRUE x % 3 == 1 [L18] x += 2 [L18] y = 0 [L16] COND FALSE !(__VERIFIER_nondet_int()) [L30] COND TRUE y == 0 [L31] CALL __VERIFIER_assert(x % 3 == 0) [L7] COND TRUE !(cond) [L8] __VERIFIER_error() RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...