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/eca-rers2012/Problem04_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f3d0b09 [2019-08-08 10:02:56,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-08 10:02:56,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-08 10:02:56,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-08 10:02:56,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-08 10:02:56,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-08 10:02:56,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-08 10:02:56,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-08 10:02:56,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-08 10:02:56,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-08 10:02:56,714 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-08 10:02:56,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-08 10:02:56,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-08 10:02:56,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-08 10:02:56,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-08 10:02:56,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-08 10:02:56,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-08 10:02:56,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-08 10:02:56,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-08 10:02:56,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-08 10:02:56,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-08 10:02:56,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-08 10:02:56,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-08 10:02:56,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-08 10:02:56,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-08 10:02:56,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-08 10:02:56,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-08 10:02:56,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-08 10:02:56,741 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 [2019-08-08 10:02:56,759 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-08 10:02:56,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-08 10:02:56,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-08 10:02:56,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-08 10:02:56,761 INFO L138 SettingsManager]: * Use SBE=true [2019-08-08 10:02:56,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-08 10:02:56,762 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-08 10:02:56,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-08 10:02:56,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-08 10:02:56,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-08 10:02:56,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-08 10:02:56,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-08 10:02:56,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-08 10:02:56,763 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-08 10:02:56,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-08 10:02:56,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-08 10:02:56,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-08 10:02:56,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-08 10:02:56,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-08 10:02:56,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-08 10:02:56,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-08 10:02:56,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-08 10:02:56,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-08 10:02:56,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-08 10:02:56,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-08 10:02:56,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-08 10:02:56,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-08 10:02:56,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-08 10:02:56,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-08 10:02:56,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-08 10:02:56,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-08 10:02:56,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-08 10:02:56,824 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-08 10:02:56,824 INFO L275 PluginConnector]: CDTParser initialized [2019-08-08 10:02:56,825 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label08.c [2019-08-08 10:02:56,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841107bd4/f64e28071e1b4e56afc523b876740170/FLAGc1e957bbe [2019-08-08 10:02:57,645 INFO L306 CDTParser]: Found 1 translation units. [2019-08-08 10:02:57,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label08.c [2019-08-08 10:02:57,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841107bd4/f64e28071e1b4e56afc523b876740170/FLAGc1e957bbe [2019-08-08 10:02:57,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/841107bd4/f64e28071e1b4e56afc523b876740170 [2019-08-08 10:02:57,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-08 10:02:57,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-08 10:02:57,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-08 10:02:57,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-08 10:02:57,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-08 10:02:57,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.08 10:02:57" (1/1) ... [2019-08-08 10:02:57,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c47dba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:02:57, skipping insertion in model container [2019-08-08 10:02:57,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.08 10:02:57" (1/1) ... [2019-08-08 10:02:57,746 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-08 10:02:57,902 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-08 10:02:59,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-08 10:02:59,479 INFO L188 MainTranslator]: Completed pre-run [2019-08-08 10:03:00,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-08 10:03:00,164 INFO L192 MainTranslator]: Completed translation [2019-08-08 10:03:00,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00 WrapperNode [2019-08-08 10:03:00,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-08 10:03:00,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-08 10:03:00,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-08 10:03:00,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-08 10:03:00,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (1/1) ... [2019-08-08 10:03:00,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-08 10:03:00,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-08 10:03:00,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-08 10:03:00,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-08 10:03:00,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.08 10:03:00" (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 [2019-08-08 10:03:00,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-08 10:03:00,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-08 10:03:00,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-08-08 10:03:00,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-08-08 10:03:00,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-08-08 10:03:00,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-08-08 10:03:00,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-08 10:03:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-08-08 10:03:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-08-08 10:03:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-08-08 10:03:00,572 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-08-08 10:03:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-08 10:03:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-08-08 10:03:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-08-08 10:03:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-08 10:03:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-08 10:03:00,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-08 10:03:10,162 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-08 10:03:10,162 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-08-08 10:03:10,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.08 10:03:10 BoogieIcfgContainer [2019-08-08 10:03:10,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-08 10:03:10,166 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-08 10:03:10,166 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-08 10:03:10,166 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-08 10:03:10,167 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.08 10:03:10" (1/1) ... [2019-08-08 10:03:10,179 INFO L148 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-08-08 10:03:10,182 INFO L155 IcfgInterpreter]: Building call graph [2019-08-08 10:03:10,200 INFO L160 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-08-08 10:03:10,209 INFO L165 IcfgInterpreter]: Starting interpretation [2019-08-08 10:03:10,210 INFO L185 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 [2019-08-08 10:03:10,264 INFO L185 IcfgInterpreter]: Interpreting procedure main with input of size 69 [2019-08-08 10:03:13,161 INFO L185 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 114 [2019-08-08 10:03:13,335 INFO L185 IcfgInterpreter]: Interpreting procedure calculate_output2 with input of size 19 [2019-08-08 10:03:13,557 INFO L185 IcfgInterpreter]: Interpreting procedure calculate_output3 with input of size 53 [2019-08-08 10:03:13,737 INFO L185 IcfgInterpreter]: Interpreting procedure calculate_output4 with input of size 57 [2019-08-08 10:03:14,061 INFO L169 IcfgInterpreter]: Interpretation finished [2019-08-08 10:03:14,061 INFO L177 IcfgInterpreter]: Final predicates for locations of interest are: [2019-08-08 10:03:14,064 INFO L179 IcfgInterpreter]: Location calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION has predicate 71206#(and (= 1 ~a1~0) (= ~a14~0 19) (= 1 ~a3~0) (not (= 1 ~a7~0)) (= ~a25~0 1) (= ~a26~0 17) (= ~a28~0 15) (= 16 ~a4~0)) [2019-08-08 10:03:14,065 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-08 10:03:14,073 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-08 10:03:14,075 INFO L168 Benchmark]: Toolchain (without parser) took 16348.07 ms. Allocated memory was 134.2 MB in the beginning and 503.3 MB in the end (delta: 369.1 MB). Free memory was 75.3 MB in the beginning and 351.6 MB in the end (delta: -276.3 MB). Peak memory consumption was 341.6 MB. Max. memory is 7.1 GB. [2019-08-08 10:03:14,076 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 108.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-08-08 10:03:14,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2437.22 ms. Allocated memory was 134.2 MB in the beginning and 260.6 MB in the end (delta: 126.4 MB). Free memory was 75.1 MB in the beginning and 134.9 MB in the end (delta: -59.8 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. [2019-08-08 10:03:14,078 INFO L168 Benchmark]: Boogie Preprocessor took 330.46 ms. Allocated memory is still 260.6 MB. Free memory was 134.9 MB in the beginning and 104.6 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. [2019-08-08 10:03:14,079 INFO L168 Benchmark]: RCFGBuilder took 9667.87 ms. Allocated memory was 260.6 MB in the beginning and 372.8 MB in the end (delta: 112.2 MB). Free memory was 104.6 MB in the beginning and 107.5 MB in the end (delta: -2.9 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. [2019-08-08 10:03:14,080 INFO L168 Benchmark]: Symbolic Interpretation took 3907.25 ms. Allocated memory was 372.8 MB in the beginning and 503.3 MB in the end (delta: 130.5 MB). Free memory was 107.5 MB in the beginning and 351.6 MB in the end (delta: -244.1 MB). Peak memory consumption was 135.2 MB. Max. memory is 7.1 GB. [2019-08-08 10:03:14,085 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 4778]: 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.. Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 108.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2437.22 ms. Allocated memory was 134.2 MB in the beginning and 260.6 MB in the end (delta: 126.4 MB). Free memory was 75.1 MB in the beginning and 134.9 MB in the end (delta: -59.8 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 330.46 ms. Allocated memory is still 260.6 MB. Free memory was 134.9 MB in the beginning and 104.6 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9667.87 ms. Allocated memory was 260.6 MB in the beginning and 372.8 MB in the end (delta: 112.2 MB). Free memory was 104.6 MB in the beginning and 107.5 MB in the end (delta: -2.9 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 3907.25 ms. Allocated memory was 372.8 MB in the beginning and 503.3 MB in the end (delta: 130.5 MB). Free memory was 107.5 MB in the beginning and 351.6 MB in the end (delta: -244.1 MB). Peak memory consumption was 135.2 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...