./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dadda19c56de835988eee8d19bbc724946613e79 ................................................................................................................................................................................................................................................................................ 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 0.2.0-7b2dab5 [2021-10-11 02:30:22,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:22,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:22,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:22,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:22,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:22,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:22,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:22,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:22,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:22,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:22,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:22,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:22,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:22,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:22,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:22,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:22,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:22,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:22,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:22,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:22,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:22,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:22,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:22,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:22,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:22,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:22,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:22,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:22,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:22,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:22,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:22,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:22,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:22,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:22,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:22,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:22,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:22,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:22,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:22,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:22,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-11 02:30:22,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:22,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:22,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:22,423 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:22,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:22,423 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:22,424 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:22,424 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:22,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:22,431 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:22,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:22,431 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:22,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:22,432 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:22,432 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:22,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:22,433 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:30:22,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:22,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:22,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:30:22,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:22,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:30:22,434 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:30:22,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:30:22,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:22,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:30:22,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:22,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:22,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:22,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:22,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:22,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:30:22,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:22,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:22,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:30:22,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:22,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:22,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dadda19c56de835988eee8d19bbc724946613e79 [2021-10-11 02:30:22,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:22,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:22,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:22,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:22,745 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:22,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2021-10-11 02:30:22,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/data/de3cb8da5/452af9ade6bc4f5fbbc0f65bf1cb9324/FLAG32cedd172 [2021-10-11 02:30:23,311 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:23,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2021-10-11 02:30:23,326 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/data/de3cb8da5/452af9ade6bc4f5fbbc0f65bf1cb9324/FLAG32cedd172 [2021-10-11 02:30:23,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/data/de3cb8da5/452af9ade6bc4f5fbbc0f65bf1cb9324 [2021-10-11 02:30:23,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:23,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:23,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:23,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:23,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:23,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fad337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23, skipping insertion in model container [2021-10-11 02:30:23,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:23,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:23,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:23,919 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:23,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:23,940 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:23,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23 WrapperNode [2021-10-11 02:30:23,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:23,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:23,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:23,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:23,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:23,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:23,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:23,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:23,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:23,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:24,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:24,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... [2021-10-11 02:30:24,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:24,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:24,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:24,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:24,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:30:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:24,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:24,333 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:30:24,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:24 BoogieIcfgContainer [2021-10-11 02:30:24,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:24,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:24,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:24,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:24,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:23" (1/3) ... [2021-10-11 02:30:24,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c60df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:24, skipping insertion in model container [2021-10-11 02:30:24,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:23" (2/3) ... [2021-10-11 02:30:24,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c60df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:24, skipping insertion in model container [2021-10-11 02:30:24,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:24" (3/3) ... [2021-10-11 02:30:24,344 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2021-10-11 02:30:24,374 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:24,377 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 02:30:24,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 02:30:24,441 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:24,441 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:30:24,442 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:24,442 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:24,442 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:24,442 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:24,442 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:24,442 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2021-10-11 02:30:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:24,461 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:24,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:24,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:30:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-10-11 02:30:24,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:24,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497097704] [2021-10-11 02:30:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:24,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497097704] [2021-10-11 02:30:24,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:24,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:30:24,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813845538] [2021-10-11 02:30:24,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:24,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:24,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:24,636 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2021-10-11 02:30:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:24,664 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2021-10-11 02:30:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:24,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:30:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:24,675 INFO L225 Difference]: With dead ends: 7 [2021-10-11 02:30:24,675 INFO L226 Difference]: Without dead ends: 5 [2021-10-11 02:30:24,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2021-10-11 02:30:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-10-11 02:30:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-11 02:30:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2021-10-11 02:30:24,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2021-10-11 02:30:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:24,713 INFO L481 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2021-10-11 02:30:24,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2021-10-11 02:30:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:30:24,714 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:24,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:30:24,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:24,715 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:30:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:24,716 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-10-11 02:30:24,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:24,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979102108] [2021-10-11 02:30:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:24,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:24,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:24,756 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:30:24,756 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:30:24,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:30:24,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:30:24 BoogieIcfgContainer [2021-10-11 02:30:24,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:30:24,775 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:30:24,775 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:30:24,775 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:24,776 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:24" (3/4) ... [2021-10-11 02:30:24,778 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:30:24,811 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cab8507f-ea33-428d-8a23-ba8d74e16fe3/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:30:24,811 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:24,813 INFO L168 Benchmark]: Toolchain (without parser) took 1110.00 ms. Allocated memory is still 117.4 MB. Free memory was 85.7 MB in the beginning and 59.6 MB in the end (delta: 26.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:24,814 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 41.4 MB in the beginning and 41.3 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:24,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.00 ms. Allocated memory is still 117.4 MB. Free memory was 85.4 MB in the beginning and 93.6 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:24,816 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:24,816 INFO L168 Benchmark]: Boogie Preprocessor took 24.85 ms. Allocated memory is still 117.4 MB. Free memory was 92.2 MB in the beginning and 91.5 MB in the end (delta: 655.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:24,817 INFO L168 Benchmark]: RCFGBuilder took 330.24 ms. Allocated memory is still 117.4 MB. Free memory was 91.5 MB in the beginning and 81.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:24,818 INFO L168 Benchmark]: TraceAbstraction took 436.81 ms. Allocated memory is still 117.4 MB. Free memory was 81.1 MB in the beginning and 61.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:24,819 INFO L168 Benchmark]: Witness Printer took 36.71 ms. Allocated memory is still 117.4 MB. Free memory was 61.3 MB in the beginning and 59.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:24,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 41.4 MB in the beginning and 41.3 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.00 ms. Allocated memory is still 117.4 MB. Free memory was 85.4 MB in the beginning and 93.6 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.85 ms. Allocated memory is still 117.4 MB. Free memory was 92.2 MB in the beginning and 91.5 MB in the end (delta: 655.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 330.24 ms. Allocated memory is still 117.4 MB. Free memory was 91.5 MB in the beginning and 81.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 436.81 ms. Allocated memory is still 117.4 MB. Free memory was 81.1 MB in the beginning and 61.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 36.71 ms. Allocated memory is still 117.4 MB. Free memory was 61.3 MB in the beginning and 59.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, y; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] COND TRUE x > 0 [L27] x = y [L28] y - 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...