./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/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 aeade23d65797ff650f62ff8e383f015764d9ed2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 16:35:25,926 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:35:25,927 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:35:25,935 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:35:25,935 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:35:25,936 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:35:25,937 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:35:25,939 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:35:25,940 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:35:25,940 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:35:25,942 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:35:25,942 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:35:25,942 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:35:25,943 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:35:25,944 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:35:25,945 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:35:25,946 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:35:25,947 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:35:25,949 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:35:25,951 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:35:25,952 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:35:25,953 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:35:25,954 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:35:25,955 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:35:25,955 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:35:25,955 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:35:25,956 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:35:25,958 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:35:25,958 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:35:25,959 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:35:25,959 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:35:25,960 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:35:25,960 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:35:25,960 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:35:25,962 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:35:25,962 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:35:25,963 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 16:35:25,974 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:35:25,974 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:35:25,975 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:35:25,975 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 16:35:25,975 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 16:35:25,975 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 16:35:25,975 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 16:35:25,975 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 16:35:25,976 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 16:35:25,976 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 16:35:25,976 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 16:35:25,976 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 16:35:25,976 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 16:35:25,978 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:35:25,978 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:35:25,978 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:35:25,979 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:35:25,980 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:35:25,980 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:35:25,980 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:35:25,980 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:35:25,980 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:35:25,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:35:25,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:35:25,981 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:35:25,981 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:35:25,981 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:35:25,981 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 16:35:25,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:35:25,982 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:35:25,982 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 16:35:25,982 INFO L133 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/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/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 -> aeade23d65797ff650f62ff8e383f015764d9ed2 [2018-11-18 16:35:26,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:35:26,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:35:26,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:35:26,028 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:35:26,028 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:35:26,029 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i [2018-11-18 16:35:26,111 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/data/c237ce226/d5d3e12022764f8fbf91321cdc6aeb12/FLAGace5cfc72 [2018-11-18 16:35:26,515 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:35:26,515 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i [2018-11-18 16:35:26,520 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/data/c237ce226/d5d3e12022764f8fbf91321cdc6aeb12/FLAGace5cfc72 [2018-11-18 16:35:26,532 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/data/c237ce226/d5d3e12022764f8fbf91321cdc6aeb12 [2018-11-18 16:35:26,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:35:26,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 16:35:26,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:35:26,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:35:26,540 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:35:26,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e020c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26, skipping insertion in model container [2018-11-18 16:35:26,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:35:26,568 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:35:26,723 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:35:26,726 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:35:26,739 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:35:26,751 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:35:26,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26 WrapperNode [2018-11-18 16:35:26,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:35:26,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 16:35:26,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 16:35:26,754 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 16:35:26,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 16:35:26,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:35:26,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:35:26,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:35:26,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... [2018-11-18 16:35:26,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:35:26,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:35:26,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:35:26,793 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:35:26,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/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 [2018-11-18 16:35:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:35:26,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:35:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:35:26,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:35:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:35:26,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:35:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 16:35:26,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 16:35:27,051 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:35:27,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:35:27 BoogieIcfgContainer [2018-11-18 16:35:27,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:35:27,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:35:27,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:35:27,055 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:35:27,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:35:26" (1/3) ... [2018-11-18 16:35:27,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df5673e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:35:27, skipping insertion in model container [2018-11-18 16:35:27,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:35:26" (2/3) ... [2018-11-18 16:35:27,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df5673e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:35:27, skipping insertion in model container [2018-11-18 16:35:27,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:35:27" (3/3) ... [2018-11-18 16:35:27,057 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-11-18 16:35:27,063 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:35:27,067 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 16:35:27,076 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 16:35:27,095 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:35:27,095 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:35:27,095 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:35:27,095 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:35:27,095 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:35:27,096 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:35:27,096 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:35:27,096 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:35:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 16:35:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 16:35:27,116 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:27,116 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:27,118 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:27,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-11-18 16:35:27,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:27,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:27,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,157 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,192 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:35:27,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 16:35:27,193 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:35:27,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 16:35:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 16:35:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 16:35:27,205 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-18 16:35:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:35:27,218 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-18 16:35:27,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 16:35:27,219 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 16:35:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:35:27,225 INFO L225 Difference]: With dead ends: 31 [2018-11-18 16:35:27,225 INFO L226 Difference]: Without dead ends: 14 [2018-11-18 16:35:27,227 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 16:35:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-18 16:35:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-18 16:35:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-18 16:35:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-18 16:35:27,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-18 16:35:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:35:27,255 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-18 16:35:27,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 16:35:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-18 16:35:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 16:35:27,256 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:27,256 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:27,257 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:27,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:27,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-11-18 16:35:27,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:27,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:27,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,258 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:35:27,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 16:35:27,310 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:35:27,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 16:35:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 16:35:27,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:35:27,312 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-11-18 16:35:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:35:27,334 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-11-18 16:35:27,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 16:35:27,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 16:35:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:35:27,335 INFO L225 Difference]: With dead ends: 27 [2018-11-18 16:35:27,335 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 16:35:27,336 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:35:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 16:35:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-18 16:35:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-18 16:35:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-18 16:35:27,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-11-18 16:35:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:35:27,338 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-18 16:35:27,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 16:35:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-18 16:35:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 16:35:27,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:27,339 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:27,339 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:27,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:27,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-11-18 16:35:27,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:27,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:27,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,340 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:27,378 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:35:27,379 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-18 16:35:27,380 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [26], [29], [31], [37], [38], [39], [41] [2018-11-18 16:35:27,404 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:35:27,404 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:35:27,517 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 16:35:27,518 INFO L272 AbstractInterpreter]: Visited 14 different actions 33 times. Merged at 5 different actions 13 times. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 5. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-11-18 16:35:27,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:27,534 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 16:35:27,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:27,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:35:27,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:27,542 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:35:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:27,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:35:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:35:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,698 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:35:27,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2018-11-18 16:35:27,699 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:35:27,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 16:35:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 16:35:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:35:27,699 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-11-18 16:35:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:35:27,729 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-18 16:35:27,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 16:35:27,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-11-18 16:35:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:35:27,730 INFO L225 Difference]: With dead ends: 27 [2018-11-18 16:35:27,730 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 16:35:27,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:35:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 16:35:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-11-18 16:35:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 16:35:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-18 16:35:27,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2018-11-18 16:35:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:35:27,735 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-18 16:35:27,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 16:35:27,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-18 16:35:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 16:35:27,735 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:27,736 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:27,736 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:27,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1335432365, now seen corresponding path program 1 times [2018-11-18 16:35:27,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:27,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:27,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:27,737 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:27,774 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:35:27,774 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 16:35:27,774 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-11-18 16:35:27,775 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:35:27,776 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:35:27,832 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 16:35:27,832 INFO L272 AbstractInterpreter]: Visited 15 different actions 52 times. Merged at 6 different actions 21 times. Widened at 1 different actions 1 times. Performed 130 root evaluator evaluations with a maximum evaluation depth of 5. Performed 130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 6 fixpoints after 3 different actions. Largest state had 3 variables. [2018-11-18 16:35:27,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:27,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 16:35:27,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:27,835 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:35:27,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:27,845 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:35:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:27,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:35:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:35:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:27,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 16:35:27,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-11-18 16:35:27,921 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:35:27,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 16:35:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 16:35:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:35:27,922 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-11-18 16:35:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:35:28,002 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-11-18 16:35:28,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 16:35:28,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-11-18 16:35:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:35:28,004 INFO L225 Difference]: With dead ends: 37 [2018-11-18 16:35:28,004 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 16:35:28,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:35:28,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 16:35:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-11-18 16:35:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 16:35:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 16:35:28,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-11-18 16:35:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:35:28,009 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 16:35:28,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 16:35:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 16:35:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 16:35:28,010 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:28,010 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:28,013 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:28,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:28,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1612548918, now seen corresponding path program 2 times [2018-11-18 16:35:28,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:28,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:28,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:35:28,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:28,015 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:28,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:28,095 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:35:28,095 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:35:28,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:35:28,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:28,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:35:28,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:35:28,108 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:35:28,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 16:35:28,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:35:28,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:35:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 16:35:28,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:35:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 16:35:28,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 16:35:28,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-18 16:35:28,214 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:35:28,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 16:35:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 16:35:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:35:28,215 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2018-11-18 16:35:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:35:28,266 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2018-11-18 16:35:28,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:35:28,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-11-18 16:35:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:35:28,269 INFO L225 Difference]: With dead ends: 46 [2018-11-18 16:35:28,269 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 16:35:28,270 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:35:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 16:35:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-18 16:35:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 16:35:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-11-18 16:35:28,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2018-11-18 16:35:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:35:28,276 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-11-18 16:35:28,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 16:35:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-11-18 16:35:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 16:35:28,277 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:28,277 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:28,277 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:28,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1421000070, now seen corresponding path program 3 times [2018-11-18 16:35:28,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:28,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:28,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:35:28,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:28,285 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:35:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:28,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:28,356 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:35:28,356 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:35:28,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:35:28,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:35:28,356 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:35:28,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:35:28,374 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 16:35:28,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:35:28,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:35:28,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:35:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:28,450 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:35:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:35:28,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 16:35:28,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2018-11-18 16:35:28,580 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:35:28,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 16:35:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 16:35:28,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:35:28,581 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2018-11-18 16:35:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:35:28,658 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2018-11-18 16:35:28,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 16:35:28,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2018-11-18 16:35:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:35:28,659 INFO L225 Difference]: With dead ends: 49 [2018-11-18 16:35:28,659 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 16:35:28,660 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:35:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 16:35:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-11-18 16:35:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 16:35:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-11-18 16:35:28,665 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 31 [2018-11-18 16:35:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:35:28,665 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-11-18 16:35:28,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 16:35:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-11-18 16:35:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 16:35:28,666 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:35:28,666 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:35:28,666 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:35:28,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:35:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash 940069211, now seen corresponding path program 4 times [2018-11-18 16:35:28,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:35:28,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:28,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:35:28,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:35:28,668 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:35:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:35:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:35:28,698 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 16:35:28,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:35:28 BoogieIcfgContainer [2018-11-18 16:35:28,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:35:28,721 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:35:28,721 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:35:28,721 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:35:28,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:35:27" (3/4) ... [2018-11-18 16:35:28,723 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 16:35:28,759 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_edea8373-02e3-44dc-aa01-ddef3b34d01f/bin-2019/utaipan/witness.graphml [2018-11-18 16:35:28,760 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:35:28,760 INFO L168 Benchmark]: Toolchain (without parser) took 2224.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 961.1 MB in the beginning and 973.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 133.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:35:28,762 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:35:28,762 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.1 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:35:28,762 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.88 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:35:28,762 INFO L168 Benchmark]: Boogie Preprocessor took 21.18 ms. Allocated memory is still 1.0 GB. Free memory was 950.4 MB in the beginning and 947.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:35:28,763 INFO L168 Benchmark]: RCFGBuilder took 258.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:35:28,763 INFO L168 Benchmark]: TraceAbstraction took 1668.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.9 MB in the end (delta: 153.4 MB). Peak memory consumption was 153.4 MB. Max. memory is 11.5 GB. [2018-11-18 16:35:28,763 INFO L168 Benchmark]: Witness Printer took 39.05 ms. Allocated memory is still 1.2 GB. Free memory was 976.9 MB in the beginning and 973.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:35:28,765 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 215.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.1 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.88 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.18 ms. Allocated memory is still 1.0 GB. Free memory was 950.4 MB in the beginning and 947.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 258.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 947.7 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1668.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.9 MB in the end (delta: 153.4 MB). Peak memory consumption was 153.4 MB. Max. memory is 11.5 GB. * Witness Printer took 39.05 ms. Allocated memory is still 1.2 GB. Free memory was 976.9 MB in the beginning and 973.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 1.6s OverallTime, 7 OverallIterations, 9 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 78 SDtfs, 51 SDslu, 122 SDs, 0 SdLazy, 90 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 240 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 11725 SizeOfPredicates, 6 NumberOfNonLiveVariables, 158 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 85/234 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...