./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan --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 588716e5dd1c3d01882e1bf0a06b3529d9c3d880 ...................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-12-09 11:09:36,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:09:36,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:09:36,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:09:36,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:09:36,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:09:36,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:09:36,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:09:36,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:09:36,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:09:36,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:09:36,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:09:36,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:09:36,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:09:36,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:09:36,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:09:36,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:09:36,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:09:36,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:09:36,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:09:36,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:09:36,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:09:36,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:09:36,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:09:36,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:09:36,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:09:36,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:09:36,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:09:36,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:09:36,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:09:36,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:09:36,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:09:36,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:09:36,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:09:36,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:09:36,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:09:36,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:09:36,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:09:36,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:09:36,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:09:36,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:09:36,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 11:09:36,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:09:36,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:09:36,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:09:36,707 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:09:36,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:09:36,707 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:09:36,707 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:09:36,708 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:09:36,708 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:09:36,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:09:36,709 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 11:09:36,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:09:36,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:09:36,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:09:36,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:09:36,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:09:36,710 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 11:09:36,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:09:36,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:09:36,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:09:36,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:09:36,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:09:36,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:09:36,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:09:36,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:09:36,711 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-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588716e5dd1c3d01882e1bf0a06b3529d9c3d880 [2020-12-09 11:09:36,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:09:36,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:09:36,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:09:36,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:09:36,932 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:09:36,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c [2020-12-09 11:09:36,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/data/42e85260c/f19fd82ac7034aa888459cb4855a1d1b/FLAG92b36eb2c [2020-12-09 11:09:37,326 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:09:37,327 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c [2020-12-09 11:09:37,331 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/data/42e85260c/f19fd82ac7034aa888459cb4855a1d1b/FLAG92b36eb2c [2020-12-09 11:09:37,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/data/42e85260c/f19fd82ac7034aa888459cb4855a1d1b [2020-12-09 11:09:37,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:09:37,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:09:37,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:09:37,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:09:37,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:09:37,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518d14d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37, skipping insertion in model container [2020-12-09 11:09:37,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:09:37,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:09:37,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:09:37,469 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:09:37,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:09:37,486 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:09:37,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37 WrapperNode [2020-12-09 11:09:37,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:09:37,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:09:37,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:09:37,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:09:37,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:09:37,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:09:37,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:09:37,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:09:37,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... [2020-12-09 11:09:37,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:09:37,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:09:37,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:09:37,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:09:37,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/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 [2020-12-09 11:09:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:09:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:09:37,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:09:37,743 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 11:09:37,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:09:37 BoogieIcfgContainer [2020-12-09 11:09:37,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:09:37,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:09:37,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:09:37,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:09:37,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:09:37" (1/3) ... [2020-12-09 11:09:37,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb5d3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:09:37, skipping insertion in model container [2020-12-09 11:09:37,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:09:37" (2/3) ... [2020-12-09 11:09:37,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb5d3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:09:37, skipping insertion in model container [2020-12-09 11:09:37,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:09:37" (3/3) ... [2020-12-09 11:09:37,752 INFO L111 eAbstractionObserver]: Analyzing ICFG PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c [2020-12-09 11:09:37,765 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:09:37,768 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 11:09:37,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 11:09:37,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:09:37,800 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:09:37,800 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:09:37,800 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:09:37,800 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:09:37,800 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:09:37,800 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:09:37,800 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:09:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 11:09:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 11:09:37,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:09:37,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 11:09:37,814 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 11:09:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:09:37,818 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-12-09 11:09:37,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:09:37,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950626140] [2020-12-09 11:09:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:09:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:09:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:09:37,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950626140] [2020-12-09 11:09:37,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:09:37,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:09:37,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390507926] [2020-12-09 11:09:37,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:09:37,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:09:37,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:09:37,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:09:37,956 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-09 11:09:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:09:38,011 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 11:09:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:09:38,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 11:09:38,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:09:38,021 INFO L225 Difference]: With dead ends: 33 [2020-12-09 11:09:38,021 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 11:09:38,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:09:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 11:09:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2020-12-09 11:09:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 11:09:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-09 11:09:38,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 4 [2020-12-09 11:09:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:09:38,053 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-09 11:09:38,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:09:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-09 11:09:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 11:09:38,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:09:38,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 11:09:38,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:09:38,054 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 11:09:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:09:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2020-12-09 11:09:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:09:38,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462620996] [2020-12-09 11:09:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:09:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:09:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:09:38,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462620996] [2020-12-09 11:09:38,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:09:38,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:09:38,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457721904] [2020-12-09 11:09:38,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:09:38,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:09:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:09:38,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:09:38,092 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-12-09 11:09:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:09:38,126 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-09 11:09:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:09:38,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 11:09:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:09:38,127 INFO L225 Difference]: With dead ends: 31 [2020-12-09 11:09:38,127 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 11:09:38,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:09:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 11:09:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2020-12-09 11:09:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 11:09:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 11:09:38,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-12-09 11:09:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:09:38,131 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 11:09:38,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:09:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 11:09:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:09:38,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:09:38,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:09:38,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:09:38,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 11:09:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:09:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2020-12-09 11:09:38,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:09:38,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877948522] [2020-12-09 11:09:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:09:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:09:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:09:38,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877948522] [2020-12-09 11:09:38,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:09:38,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:09:38,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362634769] [2020-12-09 11:09:38,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:09:38,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:09:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:09:38,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:09:38,152 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-09 11:09:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:09:38,159 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-09 11:09:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:09:38,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 11:09:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:09:38,160 INFO L225 Difference]: With dead ends: 22 [2020-12-09 11:09:38,160 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 11:09:38,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:09:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 11:09:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 11:09:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 11:09:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 11:09:38,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2020-12-09 11:09:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:09:38,165 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 11:09:38,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:09:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 11:09:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:09:38,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:09:38,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:09:38,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 11:09:38,166 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 11:09:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:09:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2020-12-09 11:09:38,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:09:38,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954197559] [2020-12-09 11:09:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:09:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:09:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:09:38,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954197559] [2020-12-09 11:09:38,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:09:38,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:09:38,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674600979] [2020-12-09 11:09:38,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:09:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:09:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:09:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:09:38,188 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-09 11:09:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:09:38,199 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-12-09 11:09:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:09:38,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 11:09:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:09:38,200 INFO L225 Difference]: With dead ends: 21 [2020-12-09 11:09:38,200 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 11:09:38,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:09:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 11:09:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 11:09:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 11:09:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 11:09:38,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2020-12-09 11:09:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:09:38,205 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 11:09:38,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:09:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 11:09:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:09:38,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:09:38,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:09:38,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 11:09:38,205 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 11:09:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:09:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 925954989, now seen corresponding path program 1 times [2020-12-09 11:09:38,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:09:38,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539842599] [2020-12-09 11:09:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:09:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:09:38,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:09:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:09:38,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:09:38,241 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:09:38,241 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:09:38,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 11:09:38,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:09:38 BoogieIcfgContainer [2020-12-09 11:09:38,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:09:38,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:09:38,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:09:38,257 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:09:38,257 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:09:37" (3/4) ... [2020-12-09 11:09:38,258 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 11:09:38,283 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_559980d1-cb50-463c-89e8-ec22bd203f9b/bin/utaipan/witness.graphml [2020-12-09 11:09:38,283 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:09:38,284 INFO L168 Benchmark]: Toolchain (without parser) took 938.52 ms. Allocated memory is still 94.4 MB. Free memory was 54.6 MB in the beginning and 52.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:09:38,285 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 70.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:09:38,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.85 ms. Allocated memory is still 94.4 MB. Free memory was 54.4 MB in the beginning and 70.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-12-09 11:09:38,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.63 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 68.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:09:38,286 INFO L168 Benchmark]: Boogie Preprocessor took 11.94 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 68.0 MB in the end (delta: 978.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:09:38,286 INFO L168 Benchmark]: RCFGBuilder took 220.36 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 69.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:09:38,287 INFO L168 Benchmark]: TraceAbstraction took 509.88 ms. Allocated memory is still 94.4 MB. Free memory was 69.2 MB in the beginning and 54.3 MB in the end (delta: 14.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:09:38,288 INFO L168 Benchmark]: Witness Printer took 26.35 ms. Allocated memory is still 94.4 MB. Free memory was 54.3 MB in the beginning and 52.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:09:38,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 70.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 139.85 ms. Allocated memory is still 94.4 MB. Free memory was 54.4 MB in the beginning and 70.1 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.63 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 68.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.94 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 68.0 MB in the end (delta: 978.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 220.36 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 69.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 509.88 ms. Allocated memory is still 94.4 MB. Free memory was 69.2 MB in the beginning and 54.3 MB in the end (delta: 14.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. * Witness Printer took 26.35 ms. Allocated memory is still 94.4 MB. Free memory was 54.3 MB in the beginning and 52.6 MB in the end (delta: 1.7 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: 29]: integer overflow possible integer overflow possible We found a FailurePath: [L18] int x, y, oldx, oldy; [L19] x = __VERIFIER_nondet_int() [L20] y = __VERIFIER_nondet_int() [L21] COND TRUE x > 0 && y > 0 [L22] oldx = x [L23] oldy = y [L24] COND FALSE !(__VERIFIER_nondet_int() != 0) [L28] EXPR oldy - 2 [L28] x = oldy - 2 [L29] oldx + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 65 SDslu, 36 SDs, 0 SdLazy, 48 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, 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, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...