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-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-01cf0bf [2019-08-22 00:16:27,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-22 00:16:27,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-22 00:16:27,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-22 00:16:27,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-22 00:16:27,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-22 00:16:27,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-22 00:16:27,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-22 00:16:27,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-22 00:16:27,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-22 00:16:27,033 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-22 00:16:27,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-22 00:16:27,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-22 00:16:27,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-22 00:16:27,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-22 00:16:27,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-22 00:16:27,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-22 00:16:27,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-22 00:16:27,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-22 00:16:27,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-22 00:16:27,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-22 00:16:27,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-22 00:16:27,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-22 00:16:27,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-22 00:16:27,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-22 00:16:27,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-22 00:16:27,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-22 00:16:27,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-22 00:16:27,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-22 00:16:27,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-22 00:16:27,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-22 00:16:27,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-22 00:16:27,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-22 00:16:27,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-22 00:16:27,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-22 00:16:27,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-22 00:16:27,078 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 [2019-08-22 00:16:27,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-22 00:16:27,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-22 00:16:27,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-22 00:16:27,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-22 00:16:27,108 INFO L138 SettingsManager]: * Use SBE=true [2019-08-22 00:16:27,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-22 00:16:27,108 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-22 00:16:27,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-22 00:16:27,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-22 00:16:27,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-22 00:16:27,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-22 00:16:27,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-22 00:16:27,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-22 00:16:27,111 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-22 00:16:27,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-22 00:16:27,112 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-22 00:16:27,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-22 00:16:27,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-22 00:16:27,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-22 00:16:27,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-22 00:16:27,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-22 00:16:27,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-22 00:16:27,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-22 00:16:27,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-22 00:16:27,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-22 00:16:27,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-22 00:16:27,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-22 00:16:27,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-22 00:16:27,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-22 00:16:27,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-22 00:16:27,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-22 00:16:27,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-22 00:16:27,189 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-22 00:16:27,189 INFO L275 PluginConnector]: CDTParser initialized [2019-08-22 00:16:27,190 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2019-08-22 00:16:27,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6cfb979/210a016be1b349b4a4abc936783b4917/FLAG2e18c9b69 [2019-08-22 00:16:27,650 INFO L306 CDTParser]: Found 1 translation units. [2019-08-22 00:16:27,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2019-08-22 00:16:27,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6cfb979/210a016be1b349b4a4abc936783b4917/FLAG2e18c9b69 [2019-08-22 00:16:28,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6cfb979/210a016be1b349b4a4abc936783b4917 [2019-08-22 00:16:28,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-22 00:16:28,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-22 00:16:28,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-22 00:16:28,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-22 00:16:28,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-22 00:16:28,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f5c53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28, skipping insertion in model container [2019-08-22 00:16:28,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,032 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-22 00:16:28,056 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-22 00:16:28,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-22 00:16:28,246 INFO L188 MainTranslator]: Completed pre-run [2019-08-22 00:16:28,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-22 00:16:28,276 INFO L192 MainTranslator]: Completed translation [2019-08-22 00:16:28,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28 WrapperNode [2019-08-22 00:16:28,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-22 00:16:28,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-22 00:16:28,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-22 00:16:28,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-22 00:16:28,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-22 00:16:28,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-22 00:16:28,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-22 00:16:28,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-22 00:16:28,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:16:28" (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 [2019-08-22 00:16:28,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-22 00:16:28,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-22 00:16:28,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-22 00:16:28,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-22 00:16:28,623 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-22 00:16:28,623 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-22 00:16:28,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:16:28 BoogieIcfgContainer [2019-08-22 00:16:28,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-22 00:16:28,625 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-22 00:16:28,625 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-22 00:16:28,626 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-22 00:16:28,628 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:16:28" (1/1) ... [2019-08-22 00:16:28,661 INFO L148 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-08-22 00:16:28,664 INFO L155 IcfgInterpreter]: Building call graph [2019-08-22 00:16:28,672 INFO L160 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-08-22 00:16:28,684 INFO L165 IcfgInterpreter]: Starting interpretation [2019-08-22 00:16:28,685 INFO L185 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 [2019-08-22 00:16:28,773 INFO L185 IcfgInterpreter]: Interpreting procedure main with input of size 10 [2019-08-22 00:16:28,825 INFO L169 IcfgInterpreter]: Interpretation finished [2019-08-22 00:16:28,825 INFO L177 IcfgInterpreter]: Final predicates for locations of interest are: [2019-08-22 00:16:28,828 INFO L179 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 20#(and (<= 0 main_~main__x~0) (<= 0 main_~main__i~0) (<= 0 |old(~__return_72~0)|) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__VERIFIER_assert__cond~0 0) (<= 0 ~__return_main~0) (<= 0 ~__return_72~0) (<= main_~__tmp_1~0 0) (<= 0 main_~__tmp_1~0) (<= 0 main_~main__j~0) (<= main_~main__x~0 0)) [2019-08-22 00:16:28,837 INFO L91 terpretationObserver]: ✘ Some locations of interest might be reachable, see reported results. [2019-08-22 00:16:28,837 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-22 00:16:28,840 INFO L168 Benchmark]: Toolchain (without parser) took 824.57 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 85.5 MB in the beginning and 154.6 MB in the end (delta: -69.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-08-22 00:16:28,841 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 131.1 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-08-22 00:16:28,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.28 ms. Allocated memory is still 131.1 MB. Free memory was 85.5 MB in the beginning and 75.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-08-22 00:16:28,843 INFO L168 Benchmark]: Boogie Preprocessor took 103.20 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 75.9 MB in the beginning and 174.5 MB in the end (delta: -98.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-08-22 00:16:28,843 INFO L168 Benchmark]: RCFGBuilder took 244.02 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 163.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-08-22 00:16:28,844 INFO L168 Benchmark]: Symbolic Interpretation took 212.22 ms. Allocated memory is still 198.2 MB. Free memory was 163.2 MB in the beginning and 155.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 7.1 GB. [2019-08-22 00:16:28,848 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 48]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: Over-approximation of reachable states at this location is 20#(and (<= 0 main_~main__x~0) (<= 0 main_~main__i~0) (<= 0 |old(~__return_72~0)|) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__VERIFIER_assert__cond~0 0) (<= 0 ~__return_main~0) (<= 0 ~__return_72~0) (<= main_~__tmp_1~0 0) (<= 0 main_~__tmp_1~0) (<= 0 main_~main__j~0) (<= main_~main__x~0 0)). 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 131.1 MB. Free memory is still 105.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.28 ms. Allocated memory is still 131.1 MB. Free memory was 85.5 MB in the beginning and 75.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.20 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 75.9 MB in the beginning and 174.5 MB in the end (delta: -98.6 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.02 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 163.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 212.22 ms. Allocated memory is still 198.2 MB. Free memory was 163.2 MB in the beginning and 155.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...