./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5917ee93972738bd406398210804e4342159e8a8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 08:45:00,924 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 08:45:00,925 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 08:45:00,933 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 08:45:00,933 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 08:45:00,933 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 08:45:00,934 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 08:45:00,935 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 08:45:00,937 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 08:45:00,937 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 08:45:00,938 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 08:45:00,939 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 08:45:00,939 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 08:45:00,940 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 08:45:00,941 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 08:45:00,941 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 08:45:00,943 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 08:45:00,944 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 08:45:00,945 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 08:45:00,947 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 08:45:00,948 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 08:45:00,949 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 08:45:00,951 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 08:45:00,951 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 08:45:00,951 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 08:45:00,952 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 08:45:00,952 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 08:45:00,954 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 08:45:00,954 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 08:45:00,955 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 08:45:00,955 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 08:45:00,956 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 08:45:00,956 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 08:45:00,956 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 08:45:00,957 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 08:45:00,957 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 08:45:00,957 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2018-11-23 08:45:00,967 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 08:45:00,967 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 08:45:00,967 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 08:45:00,968 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 08:45:00,968 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 08:45:00,968 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 08:45:00,968 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 08:45:00,969 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 08:45:00,969 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 08:45:00,969 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 08:45:00,969 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 08:45:00,969 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 08:45:00,969 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 08:45:00,969 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 08:45:00,970 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-23 08:45:00,970 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 08:45:00,970 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 08:45:00,970 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 08:45:00,970 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 08:45:00,970 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 08:45:00,971 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 08:45:00,971 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 08:45:00,971 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 08:45:00,971 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 08:45:00,971 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 08:45:00,971 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 08:45:00,972 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 08:45:00,972 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 08:45:00,972 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 08:45:00,972 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2018-11-23 08:45:00,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 08:45:01,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 08:45:01,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 08:45:01,010 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 08:45:01,010 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 08:45:01,011 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c [2018-11-23 08:45:01,050 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/data/a97bb758f/d633e072ef954196b64e8a364b184174/FLAG340594ef5 [2018-11-23 08:45:01,347 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 08:45:01,347 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/sv-benchmarks/c/termination-crafted/Ackermann_false-no-overflow.c [2018-11-23 08:45:01,351 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/data/a97bb758f/d633e072ef954196b64e8a364b184174/FLAG340594ef5 [2018-11-23 08:45:01,363 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/data/a97bb758f/d633e072ef954196b64e8a364b184174 [2018-11-23 08:45:01,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 08:45:01,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 08:45:01,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 08:45:01,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 08:45:01,370 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 08:45:01,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337624aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01, skipping insertion in model container [2018-11-23 08:45:01,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 08:45:01,390 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 08:45:01,504 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 08:45:01,506 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 08:45:01,516 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 08:45:01,525 INFO L195 MainTranslator]: Completed translation [2018-11-23 08:45:01,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01 WrapperNode [2018-11-23 08:45:01,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 08:45:01,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 08:45:01,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 08:45:01,526 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 08:45:01,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 08:45:01,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 08:45:01,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 08:45:01,541 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 08:45:01,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... [2018-11-23 08:45:01,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 08:45:01,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 08:45:01,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 08:45:01,554 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 08:45:01,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/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 [2018-11-23 08:45:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 08:45:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 08:45:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2018-11-23 08:45:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2018-11-23 08:45:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 08:45:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 08:45:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 08:45:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 08:45:01,779 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 08:45:01,779 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 08:45:01,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:45:01 BoogieIcfgContainer [2018-11-23 08:45:01,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 08:45:01,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 08:45:01,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 08:45:01,783 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 08:45:01,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:45:01" (1/3) ... [2018-11-23 08:45:01,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed79390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:45:01, skipping insertion in model container [2018-11-23 08:45:01,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:45:01" (2/3) ... [2018-11-23 08:45:01,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed79390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:45:01, skipping insertion in model container [2018-11-23 08:45:01,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:45:01" (3/3) ... [2018-11-23 08:45:01,787 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann_false-no-overflow.c [2018-11-23 08:45:01,796 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 08:45:01,803 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-11-23 08:45:01,818 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-11-23 08:45:01,846 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 08:45:01,846 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 08:45:01,846 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 08:45:01,846 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 08:45:01,847 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 08:45:01,847 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 08:45:01,847 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 08:45:01,847 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 08:45:01,847 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 08:45:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2018-11-23 08:45:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 08:45:01,869 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 08:45:01,869 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:45:01,871 INFO L423 AbstractCegarLoop]: === Iteration 1 === [AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 08:45:01,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:45:01,876 INFO L82 PathProgramCache]: Analyzing trace with hash -73959616, now seen corresponding path program 1 times [2018-11-23 08:45:01,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 08:45:01,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 08:45:01,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:45:01,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:45:01,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:45:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:45:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 08:45:01,963 INFO L469 BasicCegarLoop]: Counterexample might be feasible ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator [?] CALL call ULTIMATE.init(); [?] assume true; [?] RET #51#return; [?] CALL call #t~ret6 := main(); [?] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647;~x~0 := #t~nondet3;havoc #t~nondet3;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~y~0 := #t~nondet4;havoc #t~nondet4; VAL [main_~x~0=0, main_~y~0=2147483647] [?] assume !(~x~0 < 0 || ~y~0 < 0); VAL [main_~x~0=0, main_~y~0=2147483647] [?] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [|Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] ~m := #in~m;~n := #in~n; VAL [Ack_~m=0, Ack_~n=2147483647, |Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] assume 0 == ~m; VAL [Ack_~m=0, Ack_~n=2147483647, |Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] assume !(1 + ~n <= 2147483647); VAL [Ack_~m=0, Ack_~n=2147483647, |Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] CALL call ULTIMATE.init(); [?] ensures true; [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18-L20] assume !(~x~0 < 0 || ~y~0 < 0); VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10-L12] assume 0 == ~m; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.preprocessor.BoogiePreprocessorBacktranslator [?] CALL call ULTIMATE.init(); [?] ensures true; [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18-L20] assume !(~x~0 < 0 || ~y~0 < 0); VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10-L12] assume 0 == ~m; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] ----- ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) VAL [x=0, y=2147483647] [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] ----- [2018-11-23 08:45:01,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:45:01 BoogieIcfgContainer [2018-11-23 08:45:01,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 08:45:01,989 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 08:45:01,990 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 08:45:01,990 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 08:45:01,990 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:45:01" (3/4) ... [2018-11-23 08:45:01,993 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator [?] CALL call ULTIMATE.init(); [?] assume true; [?] RET #51#return; [?] CALL call #t~ret6 := main(); [?] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647;~x~0 := #t~nondet3;havoc #t~nondet3;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~y~0 := #t~nondet4;havoc #t~nondet4; VAL [main_~x~0=0, main_~y~0=2147483647] [?] assume !(~x~0 < 0 || ~y~0 < 0); VAL [main_~x~0=0, main_~y~0=2147483647] [?] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [|Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] ~m := #in~m;~n := #in~n; VAL [Ack_~m=0, Ack_~n=2147483647, |Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] assume 0 == ~m; VAL [Ack_~m=0, Ack_~n=2147483647, |Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] assume !(1 + ~n <= 2147483647); VAL [Ack_~m=0, Ack_~n=2147483647, |Ack_#in~m|=0, |Ack_#in~n|=2147483647] [?] CALL call ULTIMATE.init(); [?] ensures true; [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18-L20] assume !(~x~0 < 0 || ~y~0 < 0); VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10-L12] assume 0 == ~m; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.preprocessor.BoogiePreprocessorBacktranslator [?] CALL call ULTIMATE.init(); [?] ensures true; [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18-L20] assume !(~x~0 < 0 || ~y~0 < 0); VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10-L12] assume 0 == ~m; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] ----- ----- class de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] ----- ----- class de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieBacktranslator [?] CALL call ULTIMATE.init(); [?] RET call ULTIMATE.init(); [?] CALL call #t~ret6 := main(); [L16] assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; [L16] ~x~0 := #t~nondet3; [L16] havoc #t~nondet3; [L17] assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; [L17] ~y~0 := #t~nondet4; [L17] havoc #t~nondet4; VAL [~x~0=0, ~y~0=2147483647] [L18] COND FALSE !(~x~0 < 0 || ~y~0 < 0) VAL [~x~0=0, ~y~0=2147483647] [L21] CALL call #t~ret5 := Ack(~x~0, ~y~0); VAL [#in~m=0, #in~n=2147483647] [L8-L13] ~m := #in~m; [L8-L13] ~n := #in~n; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] COND TRUE 0 == ~m VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L10] assert 1 + ~n <= 2147483647; VAL [#in~m=0, #in~n=2147483647, ~m=0, ~n=2147483647] [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) VAL [x=0, y=2147483647] [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] ----- [2018-11-23 08:45:02,030 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_95946f08-60ab-46f8-b9df-1c1e93b5407c/bin-2019/uautomizer/witness.graphml [2018-11-23 08:45:02,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 08:45:02,031 INFO L168 Benchmark]: Toolchain (without parser) took 664.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -122.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:45:02,033 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:45:02,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.75 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:45:02,034 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.18 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:45:02,034 INFO L168 Benchmark]: Boogie Preprocessor took 12.22 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:45:02,034 INFO L168 Benchmark]: RCFGBuilder took 225.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -152.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 08:45:02,035 INFO L168 Benchmark]: TraceAbstraction took 209.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:45:02,035 INFO L168 Benchmark]: Witness Printer took 41.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:45:02,038 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 157.75 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.18 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.22 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 225.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -152.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 209.19 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Witness Printer took 41.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) VAL [x=0, y=2147483647] [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 8 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...