./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/alias_of_return.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/alias_of_return.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3925884d137f07b09b1c6b8320dffe7629fc0b49 .................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:53:00,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:53:00,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:53:00,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:53:00,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:53:00,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:53:00,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:53:00,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:53:00,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:53:00,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:53:00,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:53:00,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:53:00,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:53:00,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:53:00,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:53:00,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:53:00,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:53:00,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:53:00,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:53:00,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:53:00,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:53:00,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:53:00,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:53:00,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:53:00,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:53:00,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:53:00,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:53:00,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:53:00,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:53:00,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:53:00,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:53:00,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:53:00,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:53:00,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:53:00,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:53:00,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:53:00,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:53:00,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:53:00,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:53:00,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:53:00,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:53:00,867 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:53:00,883 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:53:00,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:53:00,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:53:00,884 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:53:00,884 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:53:00,884 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:53:00,884 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:53:00,884 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:53:00,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:53:00,885 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:53:00,885 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:53:00,885 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:53:00,885 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:53:00,885 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:53:00,886 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:53:00,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:53:00,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:53:00,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:53:00,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:53:00,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:53:00,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:53:00,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:53:00,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:53:00,887 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:53:00,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:53:00,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:53:00,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:53:00,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:53:00,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:53:00,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:53:00,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:53:00,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:53:00,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:53:00,889 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:53:00,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:53:00,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:53:00,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:53:00,890 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_3193c52c-8b40-4dde-bd38-26f25fef04df/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 ! call(__VERIFIER_error())) ) 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 -> 3925884d137f07b09b1c6b8320dffe7629fc0b49 [2019-11-26 02:53:01,052 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:53:01,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:53:01,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:53:01,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:53:01,066 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:53:01,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/../../sv-benchmarks/c/ldv-regression/alias_of_return.i [2019-11-26 02:53:01,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/data/0069125e6/336865737cc54bec83d28ced60ce7556/FLAGda80cf154 [2019-11-26 02:53:01,520 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:53:01,521 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/sv-benchmarks/c/ldv-regression/alias_of_return.i [2019-11-26 02:53:01,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/data/0069125e6/336865737cc54bec83d28ced60ce7556/FLAGda80cf154 [2019-11-26 02:53:01,542 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/data/0069125e6/336865737cc54bec83d28ced60ce7556 [2019-11-26 02:53:01,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:53:01,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:53:01,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:53:01,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:53:01,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:53:01,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24accecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01, skipping insertion in model container [2019-11-26 02:53:01,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:53:01,577 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:53:01,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:53:01,790 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:53:01,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:53:01,818 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:53:01,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01 WrapperNode [2019-11-26 02:53:01,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:53:01,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:53:01,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:53:01,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:53:01,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:53:01,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:53:01,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:53:01,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:53:01,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... [2019-11-26 02:53:01,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:53:01,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:53:01,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:53:01,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:53:01,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/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 [2019-11-26 02:53:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:53:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:53:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:53:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:53:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:53:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:53:02,110 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:53:02,110 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-26 02:53:02,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:53:02 BoogieIcfgContainer [2019-11-26 02:53:02,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:53:02,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:53:02,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:53:02,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:53:02,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:53:01" (1/3) ... [2019-11-26 02:53:02,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f5e80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:53:02, skipping insertion in model container [2019-11-26 02:53:02,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:53:01" (2/3) ... [2019-11-26 02:53:02,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f5e80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:53:02, skipping insertion in model container [2019-11-26 02:53:02,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:53:02" (3/3) ... [2019-11-26 02:53:02,128 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2019-11-26 02:53:02,137 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:53:02,148 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:53:02,165 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:53:02,184 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:53:02,184 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:53:02,184 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:53:02,185 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:53:02,185 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:53:02,185 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:53:02,185 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:53:02,185 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:53:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-11-26 02:53:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 02:53:02,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:53:02,208 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 02:53:02,208 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:53:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:53:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash 50198, now seen corresponding path program 1 times [2019-11-26 02:53:02,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:53:02,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652503951] [2019-11-26 02:53:02,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:53:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:53:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:53:02,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652503951] [2019-11-26 02:53:02,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:53:02,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:53:02,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48233477] [2019-11-26 02:53:02,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:53:02,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:53:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:53:02,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:53:02,366 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-11-26 02:53:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:53:02,387 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2019-11-26 02:53:02,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:53:02,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-11-26 02:53:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:53:02,397 INFO L225 Difference]: With dead ends: 8 [2019-11-26 02:53:02,398 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:53:02,401 INFO L630 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 [2019-11-26 02:53:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:53:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:53:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:53:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:53:02,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 3 [2019-11-26 02:53:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:53:02,430 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:53:02,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:53:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:53:02,431 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:53:02,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:53:02,445 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:53:02,445 INFO L447 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-26 02:53:02,445 INFO L444 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2019-11-26 02:53:02,445 INFO L444 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2019-11-26 02:53:02,446 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-11-26 02:53:02,446 INFO L444 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-11-26 02:53:02,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:53:02 BoogieIcfgContainer [2019-11-26 02:53:02,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:53:02,454 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:53:02,455 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:53:02,455 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:53:02,456 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:53:02" (3/4) ... [2019-11-26 02:53:02,459 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:53:02,477 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2019-11-26 02:53:02,478 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-26 02:53:02,478 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-26 02:53:02,537 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3193c52c-8b40-4dde-bd38-26f25fef04df/bin/utaipan/witness.graphml [2019-11-26 02:53:02,538 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:53:02,541 INFO L168 Benchmark]: Toolchain (without parser) took 994.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -150.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:53:02,541 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:53:02,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -198.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:53:02,542 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:53:02,543 INFO L168 Benchmark]: Boogie Preprocessor took 16.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:53:02,543 INFO L168 Benchmark]: RCFGBuilder took 245.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:53:02,544 INFO L168 Benchmark]: TraceAbstraction took 341.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:53:02,544 INFO L168 Benchmark]: Witness Printer took 83.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:53:02,552 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 270.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -198.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 245.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 341.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Witness Printer took 83.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Result: SAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 1 NumberOfFragments, 1 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 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 correct! Received shutdown request...