./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/2Nested-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/2Nested-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/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 4143c9f7038c4b8b5babb8095ecf96c00e7adcf9 .......................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-22 13:06:20,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:20,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:20,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:20,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:20,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:20,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:20,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:20,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:20,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:20,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:20,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:20,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:20,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:20,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:20,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:20,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:20,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:20,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:20,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:20,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:20,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:20,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:20,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:20,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:20,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:20,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:20,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:20,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:20,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:20,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:20,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:20,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:20,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:20,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:20,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:20,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:20,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:20,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:20,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:20,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:20,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 13:06:20,914 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:20,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:20,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:20,919 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:20,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:20,919 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:20,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:20,920 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:20,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:20,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:20,921 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:20,921 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:20,922 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:20,922 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:20,922 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:20,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:20,923 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:06:20,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:20,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:20,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:20,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:20,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:20,924 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 13:06:20,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:20,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:20,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:20,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:20,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:20,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:20,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:20,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:20,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:20,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:20,929 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:20,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:20,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:20,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:20,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:20,930 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_23d7316e-c725-4805-bc24-8fb3ee1024c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4143c9f7038c4b8b5babb8095ecf96c00e7adcf9 [2020-11-22 13:06:21,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:21,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:21,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:21,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:21,283 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:21,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/../../sv-benchmarks/c/termination-crafted/2Nested-2.c [2020-11-22 13:06:21,347 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/data/bfc8490c3/29f4debb1eb24a9f8375d985c1fa4b5a/FLAG0880d9173 [2020-11-22 13:06:21,811 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:21,812 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/sv-benchmarks/c/termination-crafted/2Nested-2.c [2020-11-22 13:06:21,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/data/bfc8490c3/29f4debb1eb24a9f8375d985c1fa4b5a/FLAG0880d9173 [2020-11-22 13:06:22,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/data/bfc8490c3/29f4debb1eb24a9f8375d985c1fa4b5a [2020-11-22 13:06:22,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:22,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:22,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:22,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:22,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:22,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec50e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22, skipping insertion in model container [2020-11-22 13:06:22,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:22,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:22,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:22,398 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:22,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:22,445 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:22,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22 WrapperNode [2020-11-22 13:06:22,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:22,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:22,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:22,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:22,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:22,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:22,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:22,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:22,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... [2020-11-22 13:06:22,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:22,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:22,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:22,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:22,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/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 [2020-11-22 13:06:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:22,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:22,807 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:22,807 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 13:06:22,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:22 BoogieIcfgContainer [2020-11-22 13:06:22,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:22,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:22,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:22,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:22,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:22" (1/3) ... [2020-11-22 13:06:22,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621c0884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:22, skipping insertion in model container [2020-11-22 13:06:22,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:22" (2/3) ... [2020-11-22 13:06:22,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621c0884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:22, skipping insertion in model container [2020-11-22 13:06:22,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:22" (3/3) ... [2020-11-22 13:06:22,817 INFO L111 eAbstractionObserver]: Analyzing ICFG 2Nested-2.c [2020-11-22 13:06:22,827 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:22,846 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 13:06:22,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:06:22,900 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:22,906 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:22,906 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:22,906 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:22,907 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:22,907 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:22,907 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:22,907 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-22 13:06:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:06:22,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:22,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:06:22,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:06:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:22,934 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-11-22 13:06:22,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:22,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024758812] [2020-11-22 13:06:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:23,043 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:23,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:23,075 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:06:23,075 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:06:23,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:06:23,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:23 BoogieIcfgContainer [2020-11-22 13:06:23,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:23,094 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:23,094 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:23,095 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:23,095 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:22" (3/4) ... [2020-11-22 13:06:23,097 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:06:23,143 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_23d7316e-c725-4805-bc24-8fb3ee1024c4/bin/utaipan/witness.graphml [2020-11-22 13:06:23,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:23,146 INFO L168 Benchmark]: Toolchain (without parser) took 930.37 ms. Allocated memory is still 107.0 MB. Free memory was 76.8 MB in the beginning and 61.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:23,149 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 77.6 MB. Free memory was 50.6 MB in the beginning and 50.5 MB in the end (delta: 25.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:23,150 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.83 ms. Allocated memory is still 107.0 MB. Free memory was 76.8 MB in the beginning and 85.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:23,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.70 ms. Allocated memory is still 107.0 MB. Free memory was 85.9 MB in the beginning and 84.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:23,156 INFO L168 Benchmark]: Boogie Preprocessor took 24.26 ms. Allocated memory is still 107.0 MB. Free memory was 84.8 MB in the beginning and 83.8 MB in the end (delta: 987.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:23,156 INFO L168 Benchmark]: RCFGBuilder took 300.42 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 73.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:23,157 INFO L168 Benchmark]: TraceAbstraction took 281.21 ms. Allocated memory is still 107.0 MB. Free memory was 73.3 MB in the beginning and 62.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:23,158 INFO L168 Benchmark]: Witness Printer took 50.00 ms. Allocated memory is still 107.0 MB. Free memory was 62.8 MB in the beginning and 61.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:23,165 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 77.6 MB. Free memory was 50.6 MB in the beginning and 50.5 MB in the end (delta: 25.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.83 ms. Allocated memory is still 107.0 MB. Free memory was 76.8 MB in the beginning and 85.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.70 ms. Allocated memory is still 107.0 MB. Free memory was 85.9 MB in the beginning and 84.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.26 ms. Allocated memory is still 107.0 MB. Free memory was 84.8 MB in the beginning and 83.8 MB in the end (delta: 987.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 300.42 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 73.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 281.21 ms. Allocated memory is still 107.0 MB. Free memory was 73.3 MB in the beginning and 62.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 50.00 ms. Allocated memory is still 107.0 MB. Free memory was 62.8 MB in the beginning and 61.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x, y; [L17] x = __VERIFIER_nondet_int() [L18] y = __VERIFIER_nondet_int() [L19] COND TRUE x >= 0 [L20] x + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...