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/loop-invariants/odd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-2989841 [2019-08-10 02:27:25,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-10 02:27:25,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-10 02:27:25,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-10 02:27:25,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-10 02:27:25,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-10 02:27:25,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-10 02:27:25,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-10 02:27:25,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-10 02:27:25,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-10 02:27:25,177 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-10 02:27:25,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-10 02:27:25,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-10 02:27:25,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-10 02:27:25,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-10 02:27:25,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-10 02:27:25,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-10 02:27:25,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-10 02:27:25,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-10 02:27:25,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-10 02:27:25,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-10 02:27:25,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-10 02:27:25,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-10 02:27:25,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-10 02:27:25,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-10 02:27:25,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-10 02:27:25,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-10 02:27:25,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-10 02:27:25,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-10 02:27:25,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-10 02:27:25,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-10 02:27:25,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-10 02:27:25,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-10 02:27:25,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-10 02:27:25,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-10 02:27:25,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-10 02:27:25,226 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 [2019-08-10 02:27:25,243 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-10 02:27:25,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-10 02:27:25,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-10 02:27:25,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-10 02:27:25,245 INFO L138 SettingsManager]: * Use SBE=true [2019-08-10 02:27:25,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-10 02:27:25,245 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-10 02:27:25,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-10 02:27:25,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-10 02:27:25,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-10 02:27:25,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-10 02:27:25,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-10 02:27:25,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-10 02:27:25,246 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-10 02:27:25,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-10 02:27:25,247 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-10 02:27:25,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-10 02:27:25,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-10 02:27:25,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-10 02:27:25,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-10 02:27:25,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-10 02:27:25,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-10 02:27:25,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-10 02:27:25,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-10 02:27:25,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-10 02:27:25,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-10 02:27:25,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-10 02:27:25,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-10 02:27:25,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-10 02:27:25,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-10 02:27:25,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-10 02:27:25,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-10 02:27:25,322 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-10 02:27:25,322 INFO L275 PluginConnector]: CDTParser initialized [2019-08-10 02:27:25,323 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/odd.c [2019-08-10 02:27:25,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff2d72e8/af8e05aeb2bb421bab5515e8adf0e4e0/FLAG8a2caff99 [2019-08-10 02:27:25,849 INFO L306 CDTParser]: Found 1 translation units. [2019-08-10 02:27:25,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/odd.c [2019-08-10 02:27:25,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff2d72e8/af8e05aeb2bb421bab5515e8adf0e4e0/FLAG8a2caff99 [2019-08-10 02:27:26,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff2d72e8/af8e05aeb2bb421bab5515e8adf0e4e0 [2019-08-10 02:27:26,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-10 02:27:26,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-10 02:27:26,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-10 02:27:26,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-10 02:27:26,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-10 02:27:26,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457a4827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26, skipping insertion in model container [2019-08-10 02:27:26,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,308 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-10 02:27:26,324 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-10 02:27:26,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-10 02:27:26,502 INFO L188 MainTranslator]: Completed pre-run [2019-08-10 02:27:26,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-10 02:27:26,529 INFO L192 MainTranslator]: Completed translation [2019-08-10 02:27:26,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26 WrapperNode [2019-08-10 02:27:26,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-10 02:27:26,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-10 02:27:26,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-10 02:27:26,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-10 02:27:26,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:26,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-10 02:27:26,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-10 02:27:26,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-10 02:27:26,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-10 02:27:26,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.08 02:27:26" (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 [2019-08-10 02:27:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-10 02:27:26,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-10 02:27:26,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-08-10 02:27:26,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-10 02:27:26,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-10 02:27:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-10 02:27:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-08-10 02:27:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-10 02:27:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-10 02:27:26,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-10 02:27:26,865 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-10 02:27:26,866 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-10 02:27:26,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.08 02:27:26 BoogieIcfgContainer [2019-08-10 02:27:26,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-10 02:27:26,868 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-10 02:27:26,868 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-10 02:27:26,868 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-10 02:27:26,869 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.08 02:27:26" (1/1) ... [2019-08-10 02:27:27,021 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-10 02:27:27,030 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-10 02:27:27,033 INFO L168 Benchmark]: Toolchain (without parser) took 740.06 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 86.5 MB in the beginning and 157.6 MB in the end (delta: -71.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-10 02:27:27,033 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 138.9 MB. Free memory is still 104.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-10 02:27:27,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.39 ms. Allocated memory is still 138.9 MB. Free memory was 86.5 MB in the beginning and 77.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-08-10 02:27:27,036 INFO L168 Benchmark]: Boogie Preprocessor took 125.11 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 77.0 MB in the beginning and 176.4 MB in the end (delta: -99.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-08-10 02:27:27,037 INFO L168 Benchmark]: RCFGBuilder took 211.51 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 165.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-08-10 02:27:27,038 INFO L168 Benchmark]: Symbolic Interpretation took 162.25 ms. Allocated memory is still 198.7 MB. Free memory was 165.9 MB in the beginning and 157.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 7.1 GB. [2019-08-10 02:27:27,043 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 5]: 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 42#(and (exists ((v_main_~x~0_BEFORE_CALL_1 Int) (v_prenex_1 Int)) (or (and (= |__VERIFIER_assert_#in~cond| (+ (mod v_prenex_1 2) (- 4294967296))) (not (<= (mod v_prenex_1 2) 2147483647)) (not (< (mod v_prenex_1 4294967296) 0))) (and (= |__VERIFIER_assert_#in~cond| (mod (+ (mod v_main_~x~0_BEFORE_CALL_1 2) 4294967294) 4294967296)) (not (= (mod v_main_~x~0_BEFORE_CALL_1 2) 0)) (< (mod v_main_~x~0_BEFORE_CALL_1 4294967296) 0) (<= (mod (+ (mod v_main_~x~0_BEFORE_CALL_1 2) 4294967294) 4294967296) 2147483647)) (and (= (mod v_prenex_1 2) 0) (= (mod v_prenex_1 2) |__VERIFIER_assert_#in~cond|) (<= (mod v_prenex_1 2) 2147483647)) (and (= (mod v_prenex_1 2) |__VERIFIER_assert_#in~cond|) (<= (mod v_prenex_1 2) 2147483647) (not (< (mod v_prenex_1 4294967296) 0))) (and (= |__VERIFIER_assert_#in~cond| (+ (mod v_prenex_1 2) (- 4294967296))) (= (mod v_prenex_1 2) 0) (not (<= (mod v_prenex_1 2) 2147483647))) (and (= |__VERIFIER_assert_#in~cond| (+ (mod (+ (mod v_main_~x~0_BEFORE_CALL_1 2) 4294967294) 4294967296) (- 4294967296))) (not (<= (mod (+ (mod v_main_~x~0_BEFORE_CALL_1 2) 4294967294) 4294967296) 2147483647)) (not (= (mod v_main_~x~0_BEFORE_CALL_1 2) 0)) (< (mod v_main_~x~0_BEFORE_CALL_1 4294967296) 0)))) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)). Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 138.9 MB. Free memory is still 104.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.39 ms. Allocated memory is still 138.9 MB. Free memory was 86.5 MB in the beginning and 77.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.11 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 77.0 MB in the beginning and 176.4 MB in the end (delta: -99.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 211.51 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 165.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 162.25 ms. Allocated memory is still 198.7 MB. Free memory was 165.9 MB in the beginning and 157.6 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...