./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/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 32bit --witnessprinter.graph.data.programhash 1c7eaf6fd654eb823cca8af53b20b25aebb12776 ................................................................................................................................................................................................................................................................................. 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 0.1.25-f470102 [2019-12-07 22:07:31,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 22:07:31,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 22:07:31,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 22:07:31,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 22:07:31,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 22:07:31,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 22:07:31,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 22:07:31,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 22:07:31,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 22:07:31,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 22:07:31,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 22:07:31,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 22:07:31,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 22:07:31,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 22:07:31,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 22:07:31,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 22:07:31,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 22:07:31,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 22:07:31,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 22:07:31,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 22:07:31,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 22:07:31,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 22:07:31,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 22:07:31,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 22:07:31,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 22:07:31,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 22:07:31,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 22:07:31,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 22:07:31,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 22:07:31,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 22:07:31,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 22:07:31,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 22:07:31,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 22:07:31,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 22:07:31,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 22:07:31,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 22:07:31,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 22:07:31,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 22:07:31,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 22:07:31,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 22:07:31,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-12-07 22:07:31,970 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 22:07:31,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 22:07:31,971 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 22:07:31,971 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 22:07:31,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 22:07:31,971 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 22:07:31,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 22:07:31,971 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 22:07:31,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 22:07:31,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 22:07:31,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 22:07:31,972 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 22:07:31,972 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 22:07:31,972 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 22:07:31,972 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 22:07:31,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 22:07:31,973 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 22:07:31,973 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 22:07:31,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 22:07:31,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 22:07:31,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 22:07:31,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 22:07:31,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 22:07:31,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 22:07:31,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 22:07:31,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 22:07:31,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 22:07:31,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 22:07:31,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 22:07:31,975 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 22:07:31,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 22:07:31,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 22:07:31,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 22:07:31,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 22:07:31,976 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_bab771d4-4e3e-4902-8b51-fb641aca59ae/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c7eaf6fd654eb823cca8af53b20b25aebb12776 [2019-12-07 22:07:32,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 22:07:32,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 22:07:32,084 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 22:07:32,085 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 22:07:32,085 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 22:07:32,086 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2019-12-07 22:07:32,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/data/e26a89482/5d65ad618e7546318423ec23ba9df6e6/FLAG5cd073f1d [2019-12-07 22:07:32,444 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 22:07:32,444 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2019-12-07 22:07:32,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/data/e26a89482/5d65ad618e7546318423ec23ba9df6e6/FLAG5cd073f1d [2019-12-07 22:07:32,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/data/e26a89482/5d65ad618e7546318423ec23ba9df6e6 [2019-12-07 22:07:32,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 22:07:32,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 22:07:32,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:32,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 22:07:32,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 22:07:32,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174ba895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32, skipping insertion in model container [2019-12-07 22:07:32,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 22:07:32,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 22:07:32,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:32,599 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 22:07:32,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:32,649 INFO L208 MainTranslator]: Completed translation [2019-12-07 22:07:32,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32 WrapperNode [2019-12-07 22:07:32,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:32,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:32,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 22:07:32,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 22:07:32,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:32,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 22:07:32,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 22:07:32,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 22:07:32,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... [2019-12-07 22:07:32,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 22:07:32,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 22:07:32,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 22:07:32,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 22:07:32,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/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 [2019-12-07 22:07:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2019-12-07 22:07:32,719 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2019-12-07 22:07:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2019-12-07 22:07:32,719 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2019-12-07 22:07:32,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 22:07:32,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 22:07:32,860 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 22:07:32,860 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 22:07:32,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:32 BoogieIcfgContainer [2019-12-07 22:07:32,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 22:07:32,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 22:07:32,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 22:07:32,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 22:07:32,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:07:32" (1/3) ... [2019-12-07 22:07:32,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369c2a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:32, skipping insertion in model container [2019-12-07 22:07:32,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:32" (2/3) ... [2019-12-07 22:07:32,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369c2a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:32, skipping insertion in model container [2019-12-07 22:07:32,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:32" (3/3) ... [2019-12-07 22:07:32,866 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd03WithOverflowBug.c [2019-12-07 22:07:32,872 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 22:07:32,876 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 22:07:32,883 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 22:07:32,897 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 22:07:32,897 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 22:07:32,898 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 22:07:32,898 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 22:07:32,898 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 22:07:32,898 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 22:07:32,898 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 22:07:32,898 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 22:07:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-12-07 22:07:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 22:07:32,914 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:32,914 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 22:07:32,914 INFO L410 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 22:07:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:32,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1878445815, now seen corresponding path program 1 times [2019-12-07 22:07:32,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:32,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011265767] [2019-12-07 22:07:32,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:33,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011265767] [2019-12-07 22:07:33,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:33,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 22:07:33,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932949851] [2019-12-07 22:07:33,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 22:07:33,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 22:07:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 22:07:33,036 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2019-12-07 22:07:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:33,098 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-12-07 22:07:33,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 22:07:33,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-12-07 22:07:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:33,105 INFO L225 Difference]: With dead ends: 39 [2019-12-07 22:07:33,105 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 22:07:33,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 22:07:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 22:07:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-12-07 22:07:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 22:07:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-12-07 22:07:33,130 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 6 [2019-12-07 22:07:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:33,130 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-12-07 22:07:33,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 22:07:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-12-07 22:07:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 22:07:33,131 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:33,131 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:33,131 INFO L410 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 22:07:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1897721837, now seen corresponding path program 1 times [2019-12-07 22:07:33,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:33,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886091807] [2019-12-07 22:07:33,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 22:07:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 22:07:33,151 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 22:07:33,151 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 22:07:33,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:07:33 BoogieIcfgContainer [2019-12-07 22:07:33,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 22:07:33,166 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 22:07:33,166 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 22:07:33,166 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 22:07:33,166 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:32" (3/4) ... [2019-12-07 22:07:33,167 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 22:07:33,191 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bab771d4-4e3e-4902-8b51-fb641aca59ae/bin/utaipan/witness.graphml [2019-12-07 22:07:33,192 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 22:07:33,193 INFO L168 Benchmark]: Toolchain (without parser) took 732.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 942.4 MB in the beginning and 1.0 GB in the end (delta: -100.9 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:33,193 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:33,194 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:33,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.45 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:33,194 INFO L168 Benchmark]: Boogie Preprocessor took 10.95 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:33,195 INFO L168 Benchmark]: RCFGBuilder took 181.08 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: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:33,195 INFO L168 Benchmark]: TraceAbstraction took 303.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:33,196 INFO L168 Benchmark]: Witness Printer took 26.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:33,198 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 188.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.45 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.95 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 181.08 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: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 303.42 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 11.5 GB. * Witness Printer took 26.07 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 32]: integer overflow possible integer overflow possible We found a FailurePath: [L38] int n = __VERIFIER_nondet_int(); [L39] CALL isEven(n) VAL [\old(n)=-2147483648] [L27] COND FALSE !(n == 0) VAL [\old(n)=-2147483648, n=-2147483648] [L29] COND FALSE !(n == 1) VAL [\old(n)=-2147483648, n=-2147483648] [L32] n - 1 VAL [\old(n)=-2147483648, n=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 4 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 19 SDslu, 64 SDs, 0 SdLazy, 30 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 75 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...