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/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-55cd5f5 [2019-08-15 00:43:40,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-15 00:43:40,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-15 00:43:40,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-15 00:43:40,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-15 00:43:40,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-15 00:43:40,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-15 00:43:40,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-15 00:43:40,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-15 00:43:40,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-15 00:43:40,608 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-15 00:43:40,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-15 00:43:40,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-15 00:43:40,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-15 00:43:40,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-15 00:43:40,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-15 00:43:40,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-15 00:43:40,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-15 00:43:40,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-15 00:43:40,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-15 00:43:40,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-15 00:43:40,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-15 00:43:40,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-15 00:43:40,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-15 00:43:40,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-08-15 00:43:40,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-15 00:43:40,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-15 00:43:40,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-15 00:43:40,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-15 00:43:40,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-15 00:43:40,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-15 00:43:40,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-15 00:43:40,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-15 00:43:40,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-15 00:43:40,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-15 00:43:40,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-15 00:43:40,635 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 [2019-08-15 00:43:40,649 INFO L113 SettingsManager]: Loading preferences was successful [2019-08-15 00:43:40,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-08-15 00:43:40,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-08-15 00:43:40,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-08-15 00:43:40,651 INFO L138 SettingsManager]: * Use SBE=true [2019-08-15 00:43:40,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-08-15 00:43:40,652 INFO L138 SettingsManager]: * sizeof long=4 [2019-08-15 00:43:40,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-08-15 00:43:40,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-08-15 00:43:40,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-08-15 00:43:40,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-08-15 00:43:40,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-08-15 00:43:40,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-08-15 00:43:40,653 INFO L138 SettingsManager]: * sizeof long double=12 [2019-08-15 00:43:40,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-08-15 00:43:40,654 INFO L138 SettingsManager]: * Use constant arrays=true [2019-08-15 00:43:40,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-08-15 00:43:40,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-08-15 00:43:40,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-08-15 00:43:40,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-08-15 00:43:40,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-08-15 00:43:40,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-08-15 00:43:40,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-08-15 00:43:40,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-08-15 00:43:40,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-08-15 00:43:40,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-08-15 00:43:40,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-08-15 00:43:40,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-08-15 00:43:40,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-08-15 00:43:40,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-15 00:43:40,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-15 00:43:40,702 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-15 00:43:40,703 INFO L271 PluginConnector]: Initializing CDTParser... [2019-08-15 00:43:40,704 INFO L275 PluginConnector]: CDTParser initialized [2019-08-15 00:43:40,704 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2019-08-15 00:43:40,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d78781dc/518075a68bf0431fb99dd0fd473b9497/FLAG6dd180171 [2019-08-15 00:43:41,288 INFO L306 CDTParser]: Found 1 translation units. [2019-08-15 00:43:41,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2019-08-15 00:43:41,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d78781dc/518075a68bf0431fb99dd0fd473b9497/FLAG6dd180171 [2019-08-15 00:43:41,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d78781dc/518075a68bf0431fb99dd0fd473b9497 [2019-08-15 00:43:41,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-15 00:43:41,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-08-15 00:43:41,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-08-15 00:43:41,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-08-15 00:43:41,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-08-15 00:43:41,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.08 12:43:41" (1/1) ... [2019-08-15 00:43:41,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c761168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:41, skipping insertion in model container [2019-08-15 00:43:41,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.08 12:43:41" (1/1) ... [2019-08-15 00:43:41,638 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-08-15 00:43:41,700 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-08-15 00:43:42,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-15 00:43:42,030 INFO L188 MainTranslator]: Completed pre-run [2019-08-15 00:43:42,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-08-15 00:43:42,320 INFO L192 MainTranslator]: Completed translation [2019-08-15 00:43:42,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42 WrapperNode [2019-08-15 00:43:42,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-08-15 00:43:42,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-15 00:43:42,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-15 00:43:42,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-15 00:43:42,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (1/1) ... [2019-08-15 00:43:42,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-15 00:43:42,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-15 00:43:42,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-15 00:43:42,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-15 00:43:42,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.08 12:43:42" (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 [2019-08-15 00:43:42,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-08-15 00:43:42,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-15 00:43:42,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-08-15 00:43:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-08-15 00:43:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-08-15 00:43:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-08-15 00:43:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-08-15 00:43:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-08-15 00:43:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-08-15 00:43:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-08-15 00:43:42,495 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-08-15 00:43:42,495 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-08-15 00:43:42,495 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-08-15 00:43:42,496 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2019-08-15 00:43:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2019-08-15 00:43:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-08-15 00:43:42,499 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-08-15 00:43:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-08-15 00:43:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-08-15 00:43:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-15 00:43:43,691 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-15 00:43:43,691 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-15 00:43:43,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.08 12:43:43 BoogieIcfgContainer [2019-08-15 00:43:43,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-15 00:43:43,694 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-15 00:43:43,694 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-15 00:43:43,695 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-15 00:43:43,695 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.08 12:43:43" (1/1) ... [2019-08-15 00:43:44,108 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-08-15 00:43:44,351 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-08-15 00:46:14,138 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-15 00:46:14,140 INFO L168 Benchmark]: Toolchain (without parser) took 152518.97 ms. Allocated memory was 131.1 MB in the beginning and 3.0 GB in the end (delta: 2.9 GB). Free memory was 84.7 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2019-08-15 00:46:14,141 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 131.1 MB. Free memory was 104.1 MB in the beginning and 103.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-08-15 00:46:14,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.67 ms. Allocated memory was 131.1 MB in the beginning and 200.8 MB in the end (delta: 69.7 MB). Free memory was 84.3 MB in the beginning and 170.4 MB in the end (delta: -86.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2019-08-15 00:46:14,143 INFO L168 Benchmark]: Boogie Preprocessor took 87.25 ms. Allocated memory is still 200.8 MB. Free memory was 170.4 MB in the beginning and 166.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2019-08-15 00:46:14,144 INFO L168 Benchmark]: RCFGBuilder took 1285.07 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 89.0 MB in the end (delta: 77.9 MB). Peak memory consumption was 77.9 MB. Max. memory is 7.1 GB. [2019-08-15 00:46:14,145 INFO L168 Benchmark]: Symbolic Interpretation took 150444.11 ms. Allocated memory was 200.8 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 89.0 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2019-08-15 00:46:14,149 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 545]: 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 325136#(and (= 0 (mod main_~assert__arg~2 256)) (= ~__return_1306~0 main_~check__tmp~2) (= main_~main__c1~0 ~__return_1306~0) (= main_~__tmp_3~0 main_~assert__arg~2) (= main_~__tmp_3~0 (ite (= main_~main__c1~0 0) 0 1))). Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 131.1 MB. Free memory was 104.1 MB in the beginning and 103.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 698.67 ms. Allocated memory was 131.1 MB in the beginning and 200.8 MB in the end (delta: 69.7 MB). Free memory was 84.3 MB in the beginning and 170.4 MB in the end (delta: -86.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 87.25 ms. Allocated memory is still 200.8 MB. Free memory was 170.4 MB in the beginning and 166.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1285.07 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 89.0 MB in the end (delta: 77.9 MB). Peak memory consumption was 77.9 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 150444.11 ms. Allocated memory was 200.8 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 89.0 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...