./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --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_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/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 595c6555624af5bbcf79585a20acb2500e3eeee8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 17:44:37,286 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:44:37,287 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:44:37,294 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:44:37,294 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:44:37,295 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:44:37,295 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:44:37,297 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:44:37,298 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:44:37,298 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:44:37,299 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:44:37,299 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:44:37,300 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:44:37,300 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:44:37,301 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:44:37,302 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:44:37,302 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:44:37,303 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:44:37,305 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:44:37,306 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:44:37,306 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:44:37,307 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:44:37,309 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:44:37,309 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:44:37,309 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:44:37,310 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:44:37,310 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:44:37,311 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:44:37,311 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:44:37,312 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:44:37,312 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:44:37,313 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:44:37,313 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:44:37,313 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:44:37,314 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:44:37,314 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:44:37,314 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 17:44:37,325 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:44:37,325 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:44:37,326 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:44:37,326 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 17:44:37,326 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 17:44:37,326 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 17:44:37,326 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 17:44:37,326 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 17:44:37,327 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 17:44:37,327 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 17:44:37,327 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 17:44:37,327 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 17:44:37,327 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 17:44:37,327 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:44:37,328 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:44:37,328 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:44:37,329 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:44:37,329 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:44:37,329 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:44:37,330 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:44:37,330 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:44:37,331 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:44:37,331 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 17:44:37,331 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_00815985-0844-4222-9cd3-5c459eb6b1d5/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-18 17:44:37,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:44:37,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:44:37,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:44:37,366 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:44:37,366 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:44:37,366 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 17:44:37,402 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/data/50588f866/260c8619cdf74f898d7b6f88ceb296f5/FLAGa8ad28b6a [2018-11-18 17:44:37,808 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:44:37,808 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 17:44:37,812 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/data/50588f866/260c8619cdf74f898d7b6f88ceb296f5/FLAGa8ad28b6a [2018-11-18 17:44:37,821 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/data/50588f866/260c8619cdf74f898d7b6f88ceb296f5 [2018-11-18 17:44:37,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:44:37,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 17:44:37,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:44:37,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:44:37,827 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:44:37,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa4619e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37, skipping insertion in model container [2018-11-18 17:44:37,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:44:37,846 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:44:37,953 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:44:37,956 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:44:37,965 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:44:37,974 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:44:37,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37 WrapperNode [2018-11-18 17:44:37,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:44:37,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 17:44:37,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 17:44:37,975 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 17:44:37,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 17:44:37,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:44:37,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:44:37,987 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:44:37,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... [2018-11-18 17:44:37,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:44:37,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:44:37,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:44:37,997 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:44:37,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/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 17:44:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:44:38,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:44:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:44:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:44:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:44:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:44:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-18 17:44:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-18 17:44:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-18 17:44:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-18 17:44:38,169 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:44:38,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:44:38 BoogieIcfgContainer [2018-11-18 17:44:38,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:44:38,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:44:38,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:44:38,172 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:44:38,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:44:37" (1/3) ... [2018-11-18 17:44:38,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7153cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:44:38, skipping insertion in model container [2018-11-18 17:44:38,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:44:37" (2/3) ... [2018-11-18 17:44:38,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7153cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:44:38, skipping insertion in model container [2018-11-18 17:44:38,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:44:38" (3/3) ... [2018-11-18 17:44:38,174 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 17:44:38,180 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:44:38,183 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 17:44:38,192 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 17:44:38,216 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:44:38,216 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:44:38,216 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:44:38,216 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:44:38,216 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:44:38,216 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:44:38,216 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:44:38,216 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:44:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-18 17:44:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 17:44:38,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:38,230 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:38,231 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:38,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-18 17:44:38,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:38,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:38,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,266 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:38,339 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 17:44:38,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:44:38,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 17:44:38,340 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:44:38,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:44:38,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:44:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:44:38,352 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-18 17:44:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:38,414 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-18 17:44:38,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:44:38,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 17:44:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:38,421 INFO L225 Difference]: With dead ends: 44 [2018-11-18 17:44:38,421 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 17:44:38,423 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:44:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 17:44:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 17:44:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 17:44:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-18 17:44:38,453 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-18 17:44:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:38,453 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-18 17:44:38,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:44:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-18 17:44:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 17:44:38,455 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:38,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:38,455 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:38,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-18 17:44:38,456 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:38,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:38,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,457 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:38,499 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 17:44:38,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:44:38,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 17:44:38,500 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:44:38,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:44:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:44:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:44:38,502 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-18 17:44:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:38,565 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-18 17:44:38,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:44:38,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 17:44:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:38,566 INFO L225 Difference]: With dead ends: 36 [2018-11-18 17:44:38,566 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 17:44:38,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:44:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 17:44:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-18 17:44:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 17:44:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-18 17:44:38,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-18 17:44:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:38,572 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-18 17:44:38,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:44:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-18 17:44:38,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 17:44:38,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:38,573 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:38,573 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:38,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-18 17:44:38,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:38,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:38,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,574 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 17:44:38,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:38,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:38,640 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-18 17:44:38,641 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-11-18 17:44:38,662 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:44:38,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:44:38,734 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 17:44:38,735 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-11-18 17:44:38,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:38,740 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 17:44:38,770 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 17:44:38,770 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 17:44:38,804 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-18 17:44:38,804 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 17:44:38,805 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 17:44:38,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-18 17:44:38,805 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:44:38,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 17:44:38,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 17:44:38,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 17:44:38,806 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-11-18 17:44:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:38,972 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-11-18 17:44:38,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 17:44:38,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-18 17:44:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:38,973 INFO L225 Difference]: With dead ends: 72 [2018-11-18 17:44:38,973 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 17:44:38,973 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 17:44:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 17:44:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-11-18 17:44:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 17:44:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-11-18 17:44:38,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-11-18 17:44:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:38,979 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-11-18 17:44:38,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 17:44:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-11-18 17:44:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 17:44:38,980 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:38,980 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:38,981 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:38,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-18 17:44:38,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:38,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:38,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:38,982 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 17:44:39,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:39,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:39,046 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-11-18 17:44:39,046 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-18 17:44:39,047 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:44:39,048 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:44:39,131 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 17:44:39,131 INFO L272 AbstractInterpreter]: Visited 28 different actions 200 times. Never merged. Widened at 2 different actions 11 times. Performed 411 root evaluator evaluations with a maximum evaluation depth of 4. Performed 411 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 18 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-18 17:44:39,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:39,136 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 17:44:39,150 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 17:44:39,150 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 17:44:39,187 INFO L415 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-11-18 17:44:39,187 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 17:44:39,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 17:44:39,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-11-18 17:44:39,187 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:44:39,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 17:44:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 17:44:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-18 17:44:39,188 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-11-18 17:44:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:39,414 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-11-18 17:44:39,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 17:44:39,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-18 17:44:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:39,415 INFO L225 Difference]: With dead ends: 87 [2018-11-18 17:44:39,415 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 17:44:39,416 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:44:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 17:44:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-18 17:44:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 17:44:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-11-18 17:44:39,422 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-11-18 17:44:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:39,422 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-11-18 17:44:39,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 17:44:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-11-18 17:44:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-18 17:44:39,424 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:39,424 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:39,425 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:39,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-11-18 17:44:39,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:39,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:39,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:39,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:39,426 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 17:44:39,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:39,472 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:39,473 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:39,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:39,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:39,474 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/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 17:44:39,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:44:39,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:44:39,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 17:44:39,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:39,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-18 17:44:39,574 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 17:44:39,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:39,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2018-11-18 17:44:39,905 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:39,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 17:44:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 17:44:39,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-11-18 17:44:39,906 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-11-18 17:44:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:40,062 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-11-18 17:44:40,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:44:40,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-11-18 17:44:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:40,065 INFO L225 Difference]: With dead ends: 121 [2018-11-18 17:44:40,065 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 17:44:40,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-11-18 17:44:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 17:44:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-11-18 17:44:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 17:44:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-11-18 17:44:40,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-11-18 17:44:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:40,078 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-11-18 17:44:40,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 17:44:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-11-18 17:44:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 17:44:40,080 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:40,080 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:40,080 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:40,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-11-18 17:44:40,080 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:40,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:40,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:40,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:40,081 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-18 17:44:40,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:40,130 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:40,130 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-11-18 17:44:40,131 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-18 17:44:40,132 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:44:40,132 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:44:41,066 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 17:44:41,066 INFO L272 AbstractInterpreter]: Visited 29 different actions 3929 times. Merged at 11 different actions 1050 times. Widened at 2 different actions 189 times. Performed 9241 root evaluator evaluations with a maximum evaluation depth of 4. Performed 9241 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 481 fixpoints after 9 different actions. Largest state had 5 variables. [2018-11-18 17:44:41,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:41,088 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 17:44:41,103 INFO L227 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 56.25% of their original sizes. [2018-11-18 17:44:41,103 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 17:44:41,177 INFO L415 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-11-18 17:44:41,178 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 17:44:41,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 17:44:41,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2018-11-18 17:44:41,178 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:44:41,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 17:44:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 17:44:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:44:41,179 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2018-11-18 17:44:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:41,555 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2018-11-18 17:44:41,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:44:41,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-11-18 17:44:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:41,557 INFO L225 Difference]: With dead ends: 118 [2018-11-18 17:44:41,557 INFO L226 Difference]: Without dead ends: 77 [2018-11-18 17:44:41,558 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:44:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-18 17:44:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-11-18 17:44:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-18 17:44:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2018-11-18 17:44:41,567 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2018-11-18 17:44:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:41,567 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2018-11-18 17:44:41,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 17:44:41,568 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2018-11-18 17:44:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-18 17:44:41,569 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:41,570 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:41,570 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:41,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1937391112, now seen corresponding path program 1 times [2018-11-18 17:44:41,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:41,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:41,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:41,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:41,571 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-11-18 17:44:41,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:41,641 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:41,641 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 81 with the following transitions: [2018-11-18 17:44:41,641 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-18 17:44:41,643 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:44:41,643 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:44:42,001 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 17:44:42,001 INFO L272 AbstractInterpreter]: Visited 29 different actions 2572 times. Merged at 11 different actions 587 times. Widened at 2 different actions 135 times. Performed 5789 root evaluator evaluations with a maximum evaluation depth of 4. Performed 5789 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 318 fixpoints after 9 different actions. Largest state had 5 variables. [2018-11-18 17:44:42,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:42,016 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 17:44:42,028 INFO L227 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 17:44:42,029 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 17:44:42,134 INFO L415 sIntCurrentIteration]: We unified 79 AI predicates to 79 [2018-11-18 17:44:42,134 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 17:44:42,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 17:44:42,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-18 17:44:42,134 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 17:44:42,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 17:44:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 17:44:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:44:42,135 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 13 states. [2018-11-18 17:44:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:42,495 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2018-11-18 17:44:42,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:44:42,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2018-11-18 17:44:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:42,496 INFO L225 Difference]: With dead ends: 141 [2018-11-18 17:44:42,496 INFO L226 Difference]: Without dead ends: 86 [2018-11-18 17:44:42,497 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:44:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-18 17:44:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-18 17:44:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-18 17:44:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2018-11-18 17:44:42,506 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 80 [2018-11-18 17:44:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:42,506 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2018-11-18 17:44:42,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 17:44:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2018-11-18 17:44:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-18 17:44:42,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:42,508 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:42,509 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:42,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1541382103, now seen corresponding path program 1 times [2018-11-18 17:44:42,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:42,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:42,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:42,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:42,511 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-11-18 17:44:42,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:42,567 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:42,567 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 95 with the following transitions: [2018-11-18 17:44:42,567 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-11-18 17:44:42,568 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 17:44:42,569 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 17:44:43,308 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 17:44:43,309 INFO L272 AbstractInterpreter]: Visited 34 different actions 4845 times. Merged at 16 different actions 1436 times. Widened at 2 different actions 189 times. Performed 11828 root evaluator evaluations with a maximum evaluation depth of 4. Performed 11828 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 615 fixpoints after 11 different actions. Largest state had 5 variables. [2018-11-18 17:44:43,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:43,320 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 17:44:43,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:43,321 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/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 17:44:43,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:43,327 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:44:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:43,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-18 17:44:43,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-18 17:44:43,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:43,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 17 [2018-11-18 17:44:43,923 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:43,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:44:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:44:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:44:43,924 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 12 states. [2018-11-18 17:44:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:44,102 INFO L93 Difference]: Finished difference Result 212 states and 335 transitions. [2018-11-18 17:44:44,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 17:44:44,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2018-11-18 17:44:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:44,103 INFO L225 Difference]: With dead ends: 212 [2018-11-18 17:44:44,104 INFO L226 Difference]: Without dead ends: 134 [2018-11-18 17:44:44,104 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 167 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-11-18 17:44:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-18 17:44:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-11-18 17:44:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-18 17:44:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-11-18 17:44:44,119 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 94 [2018-11-18 17:44:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:44,119 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-11-18 17:44:44,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:44:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-11-18 17:44:44,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-18 17:44:44,122 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:44,123 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:44,123 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:44,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:44,123 INFO L82 PathProgramCache]: Analyzing trace with hash 721741772, now seen corresponding path program 2 times [2018-11-18 17:44:44,123 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:44,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:44,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:44,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:44,124 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-11-18 17:44:44,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:44,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:44,224 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:44,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:44,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:44,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/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 17:44:44,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:44:44,231 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:44:44,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 17:44:44,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:44,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 17 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-11-18 17:44:44,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-18 17:44:44,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:44,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 18 [2018-11-18 17:44:44,484 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:44,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 17:44:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 17:44:44,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:44:44,485 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 15 states. [2018-11-18 17:44:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:44,794 INFO L93 Difference]: Finished difference Result 231 states and 386 transitions. [2018-11-18 17:44:44,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 17:44:44,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2018-11-18 17:44:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:44,797 INFO L225 Difference]: With dead ends: 231 [2018-11-18 17:44:44,797 INFO L226 Difference]: Without dead ends: 165 [2018-11-18 17:44:44,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2018-11-18 17:44:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-11-18 17:44:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2018-11-18 17:44:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-18 17:44:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 210 transitions. [2018-11-18 17:44:44,814 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 210 transitions. Word has length 110 [2018-11-18 17:44:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:44,815 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 210 transitions. [2018-11-18 17:44:44,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 17:44:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 210 transitions. [2018-11-18 17:44:44,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-11-18 17:44:44,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:44,818 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 16, 16, 14, 12, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:44,818 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:44,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash -751072460, now seen corresponding path program 3 times [2018-11-18 17:44:44,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:44,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:44,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:44,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:44,819 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 256 proven. 176 refuted. 0 times theorem prover too weak. 1145 trivial. 0 not checked. [2018-11-18 17:44:44,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:44,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:44,971 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:44,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:44,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:44,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/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 17:44:44,979 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:44:44,980 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 17:44:45,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:44:45,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:45,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 189 proven. 232 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2018-11-18 17:44:45,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 187 proven. 242 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2018-11-18 17:44:45,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:45,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14] total 26 [2018-11-18 17:44:45,839 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:45,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 17:44:45,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 17:44:45,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2018-11-18 17:44:45,840 INFO L87 Difference]: Start difference. First operand 144 states and 210 transitions. Second operand 20 states. [2018-11-18 17:44:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:46,308 INFO L93 Difference]: Finished difference Result 339 states and 599 transitions. [2018-11-18 17:44:46,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 17:44:46,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 243 [2018-11-18 17:44:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:46,310 INFO L225 Difference]: With dead ends: 339 [2018-11-18 17:44:46,310 INFO L226 Difference]: Without dead ends: 177 [2018-11-18 17:44:46,312 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 461 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 17:44:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-18 17:44:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2018-11-18 17:44:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-11-18 17:44:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2018-11-18 17:44:46,329 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 243 [2018-11-18 17:44:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:46,329 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2018-11-18 17:44:46,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 17:44:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2018-11-18 17:44:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-18 17:44:46,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:46,333 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:46,333 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:46,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1137267730, now seen corresponding path program 4 times [2018-11-18 17:44:46,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:46,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:46,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:46,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:46,334 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 112 proven. 83 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2018-11-18 17:44:46,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:46,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:46,455 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:46,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:46,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:46,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:46,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:46,467 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:44:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:46,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 97 proven. 129 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-11-18 17:44:46,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 97 proven. 133 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2018-11-18 17:44:46,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:46,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 18 [2018-11-18 17:44:46,940 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:46,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 17:44:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 17:44:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:44:46,941 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand 14 states. [2018-11-18 17:44:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:47,182 INFO L93 Difference]: Finished difference Result 375 states and 590 transitions. [2018-11-18 17:44:47,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 17:44:47,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 188 [2018-11-18 17:44:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:47,185 INFO L225 Difference]: With dead ends: 375 [2018-11-18 17:44:47,185 INFO L226 Difference]: Without dead ends: 237 [2018-11-18 17:44:47,186 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 359 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2018-11-18 17:44:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-18 17:44:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 213. [2018-11-18 17:44:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-18 17:44:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 320 transitions. [2018-11-18 17:44:47,200 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 320 transitions. Word has length 188 [2018-11-18 17:44:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:47,200 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 320 transitions. [2018-11-18 17:44:47,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 17:44:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 320 transitions. [2018-11-18 17:44:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-18 17:44:47,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:47,203 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:47,203 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:47,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 334680454, now seen corresponding path program 5 times [2018-11-18 17:44:47,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:47,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:47,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:47,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:47,204 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 92 proven. 72 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2018-11-18 17:44:47,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:47,249 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:47,249 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:47,250 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:47,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:47,250 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:47,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:44:47,261 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:44:47,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-18 17:44:47,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:47,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 396 proven. 4 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-11-18 17:44:47,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 92 proven. 72 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2018-11-18 17:44:47,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:47,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2018-11-18 17:44:47,544 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:47,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 17:44:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 17:44:47,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 17:44:47,545 INFO L87 Difference]: Start difference. First operand 213 states and 320 transitions. Second operand 7 states. [2018-11-18 17:44:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:47,596 INFO L93 Difference]: Finished difference Result 363 states and 566 transitions. [2018-11-18 17:44:47,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 17:44:47,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2018-11-18 17:44:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:47,601 INFO L225 Difference]: With dead ends: 363 [2018-11-18 17:44:47,602 INFO L226 Difference]: Without dead ends: 184 [2018-11-18 17:44:47,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 322 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-11-18 17:44:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-11-18 17:44:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2018-11-18 17:44:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-11-18 17:44:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2018-11-18 17:44:47,626 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 164 [2018-11-18 17:44:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:47,627 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2018-11-18 17:44:47,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 17:44:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2018-11-18 17:44:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-18 17:44:47,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:47,628 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:47,628 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:47,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 6 times [2018-11-18 17:44:47,629 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:47,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:47,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:47,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:47,629 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 267 proven. 35 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-11-18 17:44:47,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:47,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:47,740 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:47,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:47,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:47,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:47,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:44:47,748 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 17:44:47,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:44:47,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:47,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 211 proven. 47 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2018-11-18 17:44:47,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 210 proven. 52 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2018-11-18 17:44:48,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:48,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 12] total 23 [2018-11-18 17:44:48,317 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:48,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 17:44:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 17:44:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2018-11-18 17:44:48,318 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand 18 states. [2018-11-18 17:44:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:48,667 INFO L93 Difference]: Finished difference Result 389 states and 565 transitions. [2018-11-18 17:44:48,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 17:44:48,668 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 191 [2018-11-18 17:44:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:48,671 INFO L225 Difference]: With dead ends: 389 [2018-11-18 17:44:48,671 INFO L226 Difference]: Without dead ends: 232 [2018-11-18 17:44:48,674 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 363 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2018-11-18 17:44:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-11-18 17:44:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 209. [2018-11-18 17:44:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-11-18 17:44:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 282 transitions. [2018-11-18 17:44:48,688 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 282 transitions. Word has length 191 [2018-11-18 17:44:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:48,689 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 282 transitions. [2018-11-18 17:44:48,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 17:44:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 282 transitions. [2018-11-18 17:44:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-11-18 17:44:48,691 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:48,691 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:48,691 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:48,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:48,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1700665814, now seen corresponding path program 7 times [2018-11-18 17:44:48,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:48,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:48,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:48,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:48,692 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 182 proven. 18 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2018-11-18 17:44:48,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:48,808 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:48,808 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:48,808 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:48,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:48,809 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:48,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:48,818 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:44:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:48,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 146 proven. 51 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2018-11-18 17:44:48,892 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 148 proven. 54 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2018-11-18 17:44:49,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:49,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 18 [2018-11-18 17:44:49,379 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:49,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 17:44:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 17:44:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:44:49,380 INFO L87 Difference]: Start difference. First operand 209 states and 282 transitions. Second operand 14 states. [2018-11-18 17:44:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:49,632 INFO L93 Difference]: Finished difference Result 419 states and 597 transitions. [2018-11-18 17:44:49,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 17:44:49,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 163 [2018-11-18 17:44:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:49,636 INFO L225 Difference]: With dead ends: 419 [2018-11-18 17:44:49,636 INFO L226 Difference]: Without dead ends: 216 [2018-11-18 17:44:49,638 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 311 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-11-18 17:44:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-11-18 17:44:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 204. [2018-11-18 17:44:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-18 17:44:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 271 transitions. [2018-11-18 17:44:49,651 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 271 transitions. Word has length 163 [2018-11-18 17:44:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:49,651 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 271 transitions. [2018-11-18 17:44:49,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 17:44:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 271 transitions. [2018-11-18 17:44:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-11-18 17:44:49,653 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:49,653 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:49,653 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:49,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -969812469, now seen corresponding path program 8 times [2018-11-18 17:44:49,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:49,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:49,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:49,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:49,654 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 245 proven. 91 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-11-18 17:44:49,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:49,802 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:49,802 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:49,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:49,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:49,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:49,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:44:49,812 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:44:49,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 17:44:49,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:49,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 335 proven. 32 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2018-11-18 17:44:49,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 335 proven. 34 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-11-18 17:44:50,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:50,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2018-11-18 17:44:50,381 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:50,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 17:44:50,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 17:44:50,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2018-11-18 17:44:50,382 INFO L87 Difference]: Start difference. First operand 204 states and 271 transitions. Second operand 20 states. [2018-11-18 17:44:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:50,669 INFO L93 Difference]: Finished difference Result 372 states and 526 transitions. [2018-11-18 17:44:50,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 17:44:50,670 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 203 [2018-11-18 17:44:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:50,671 INFO L225 Difference]: With dead ends: 372 [2018-11-18 17:44:50,671 INFO L226 Difference]: Without dead ends: 219 [2018-11-18 17:44:50,673 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 386 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 17:44:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-11-18 17:44:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2018-11-18 17:44:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-18 17:44:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 275 transitions. [2018-11-18 17:44:50,686 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 275 transitions. Word has length 203 [2018-11-18 17:44:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:50,686 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 275 transitions. [2018-11-18 17:44:50,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 17:44:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 275 transitions. [2018-11-18 17:44:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-18 17:44:50,688 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:50,688 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:50,688 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:50,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 9 times [2018-11-18 17:44:50,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:50,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:50,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:50,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:50,689 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-18 17:44:51,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:51,022 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:51,022 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:51,022 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:51,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:51,022 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:51,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:44:51,028 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 17:44:51,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:44:51,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:51,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-18 17:44:51,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-18 17:44:52,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:52,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-11-18 17:44:52,255 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:52,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 17:44:52,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 17:44:52,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 17:44:52,255 INFO L87 Difference]: Start difference. First operand 213 states and 275 transitions. Second operand 36 states. [2018-11-18 17:44:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:52,463 INFO L93 Difference]: Finished difference Result 281 states and 370 transitions. [2018-11-18 17:44:52,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 17:44:52,464 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-11-18 17:44:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:52,466 INFO L225 Difference]: With dead ends: 281 [2018-11-18 17:44:52,466 INFO L226 Difference]: Without dead ends: 264 [2018-11-18 17:44:52,467 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 344 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 17:44:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-11-18 17:44:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 213. [2018-11-18 17:44:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-18 17:44:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2018-11-18 17:44:52,477 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 177 [2018-11-18 17:44:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:52,478 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2018-11-18 17:44:52,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 17:44:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2018-11-18 17:44:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-18 17:44:52,479 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:52,479 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:52,479 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:52,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:52,480 INFO L82 PathProgramCache]: Analyzing trace with hash -504062400, now seen corresponding path program 10 times [2018-11-18 17:44:52,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:52,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:52,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:44:52,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:52,481 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 206 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-11-18 17:44:52,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:52,580 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:52,580 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:52,580 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:52,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:52,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:52,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:52,587 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 17:44:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:52,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 204 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-11-18 17:44:52,642 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 104 proven. 212 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2018-11-18 17:44:53,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:53,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14] total 20 [2018-11-18 17:44:53,211 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:53,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 17:44:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 17:44:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2018-11-18 17:44:53,212 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand 14 states. [2018-11-18 17:44:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:53,380 INFO L93 Difference]: Finished difference Result 278 states and 367 transitions. [2018-11-18 17:44:53,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 17:44:53,381 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 191 [2018-11-18 17:44:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:53,382 INFO L225 Difference]: With dead ends: 278 [2018-11-18 17:44:53,383 INFO L226 Difference]: Without dead ends: 153 [2018-11-18 17:44:53,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 366 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2018-11-18 17:44:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-18 17:44:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-18 17:44:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-18 17:44:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 181 transitions. [2018-11-18 17:44:53,394 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 181 transitions. Word has length 191 [2018-11-18 17:44:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:53,394 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 181 transitions. [2018-11-18 17:44:53,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 17:44:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 181 transitions. [2018-11-18 17:44:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-18 17:44:53,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:44:53,396 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:44:53,398 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:44:53,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:44:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1318513955, now seen corresponding path program 11 times [2018-11-18 17:44:53,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 17:44:53,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:53,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:44:53,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:44:53,399 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 17:44:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:44:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 99 proven. 291 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-11-18 17:44:53,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:53,545 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 17:44:53,545 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 17:44:53,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 17:44:53,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:44:53,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 17:44:53,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:44:53,558 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 17:44:53,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-18 17:44:53,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:44:53,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:44:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 118 proven. 254 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2018-11-18 17:44:53,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 17:44:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 120 proven. 266 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2018-11-18 17:44:54,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 17:44:54,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 22 [2018-11-18 17:44:54,420 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 17:44:54,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 17:44:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 17:44:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2018-11-18 17:44:54,421 INFO L87 Difference]: Start difference. First operand 153 states and 181 transitions. Second operand 16 states. [2018-11-18 17:44:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:44:54,552 INFO L93 Difference]: Finished difference Result 184 states and 218 transitions. [2018-11-18 17:44:54,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 17:44:54,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 204 [2018-11-18 17:44:54,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:44:54,553 INFO L225 Difference]: With dead ends: 184 [2018-11-18 17:44:54,553 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 17:44:54,554 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 391 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2018-11-18 17:44:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 17:44:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 17:44:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 17:44:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 17:44:54,555 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2018-11-18 17:44:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:44:54,555 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 17:44:54,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 17:44:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 17:44:54,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 17:44:54,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 17:44:54,748 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,754 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,788 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,790 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,814 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,841 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,844 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,941 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,960 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:54,978 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,082 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,101 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,103 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,113 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,124 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,126 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,139 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,155 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,166 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,188 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,201 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,203 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,216 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,217 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,257 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,265 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,290 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,295 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,300 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,333 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,337 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,343 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,391 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,410 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,412 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,423 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,434 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,444 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,449 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,453 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,498 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,587 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,605 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,646 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 17:44:55,813 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 7 [2018-11-18 17:44:56,177 WARN L180 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 32 [2018-11-18 17:44:56,444 WARN L180 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 40 [2018-11-18 17:44:56,446 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 17:44:56,446 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-18 17:44:56,446 INFO L425 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L421 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L428 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-18 17:44:56,447 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L421 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)))) (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (not (= |fibo2_#in~n| 5))) (<= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) (<= |fibo2_#in~n| 3) (<= 5 |fibo2_#in~n|)) (<= 2 fibo2_~n) (or (not (= |fibo2_#in~n| 3)) .cse0) (<= |fibo2_#in~n| fibo2_~n) (or .cse0 (<= 3 |fibo2_#in~n|)))) [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L425 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-18 17:44:56,447 INFO L428 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-18 17:44:56,447 INFO L421 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-18 17:44:56,448 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-18 17:44:56,448 INFO L421 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse1 (<= 3 |fibo1_#in~n|)) (.cse3 (<= 1 |fibo1_#t~ret0|)) (.cse4 (<= |fibo1_#t~ret0| 1))) (let ((.cse0 (and .cse3 (<= |fibo1_#in~n| 2) .cse4)) (.cse2 (and (<= fibo1_~n 3) .cse3 .cse1 .cse4))) (and (or .cse0 .cse1) (or (not (= |fibo1_#in~n| 6)) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|))) (or .cse0 (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) .cse2 (<= 5 |fibo1_#in~n|)) (or .cse2 (< |fibo1_#in~n| 3) (and (<= fibo1_~n |fibo1_#in~n|) (<= 4 |fibo1_#in~n|))) (or (< 2 |fibo1_#in~n|) (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n 2))) (<= |fibo1_#in~n| fibo1_~n)))) [2018-11-18 17:44:56,448 INFO L425 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-18 17:44:56,448 INFO L425 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-18 17:44:56,448 INFO L425 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-18 17:44:56,448 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-18 17:44:56,448 INFO L425 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-18 17:44:56,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:44:56 BoogieIcfgContainer [2018-11-18 17:44:56,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:44:56,451 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:44:56,451 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:44:56,451 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:44:56,451 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:44:38" (3/4) ... [2018-11-18 17:44:56,454 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 17:44:56,458 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 17:44:56,459 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 17:44:56,459 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-18 17:44:56,459 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-18 17:44:56,461 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 17:44:56,461 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 17:44:56,462 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 17:44:56,487 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_00815985-0844-4222-9cd3-5c459eb6b1d5/bin-2019/utaipan/witness.graphml [2018-11-18 17:44:56,487 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:44:56,488 INFO L168 Benchmark]: Toolchain (without parser) took 18664.28 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 744.5 MB). Free memory was 959.2 MB in the beginning and 1.4 GB in the end (delta: -425.2 MB). Peak memory consumption was 319.2 MB. Max. memory is 11.5 GB. [2018-11-18 17:44:56,488 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:44:56,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.58 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:44:56,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.83 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:44:56,489 INFO L168 Benchmark]: Boogie Preprocessor took 10.43 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 940.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-11-18 17:44:56,489 INFO L168 Benchmark]: RCFGBuilder took 172.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:44:56,489 INFO L168 Benchmark]: TraceAbstraction took 18280.02 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 597.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -253.1 MB). Peak memory consumption was 821.4 MB. Max. memory is 11.5 GB. [2018-11-18 17:44:56,490 INFO L168 Benchmark]: Witness Printer took 36.64 ms. Allocated memory is still 1.8 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:44:56,491 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.58 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 11.83 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.43 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 940.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 172.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 940.5 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18280.02 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 597.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -253.1 MB). Peak memory consumption was 821.4 MB. Max. memory is 11.5 GB. * Witness Printer took 36.64 ms. Allocated memory is still 1.8 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 18.2s OverallTime, 18 OverallIterations, 19 TraceHistogramMax, 4.1s AutomataDifference, 0.0s DeadEndRemovalTime, 1.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 668 SDtfs, 742 SDslu, 5501 SDs, 0 SdLazy, 4356 SolverSat, 614 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4456 GetRequests, 3938 SyntacticMatches, 134 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.2s AbstIntTime, 5 AbstIntIterations, 4 AbstIntStrong, 0.8596938775510204 AbsIntWeakeningRatio, 0.5714285714285714 AbsIntAvgWeakeningVarsNumRemoved, 0.20408163265306123 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 211 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 956 PreInvPairs, 2121 NumberOfFragments, 195 HoareAnnotationTreeSize, 956 FomulaSimplifications, 103716 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 5244 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 4187 NumberOfCodeBlocks, 3887 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 6125 ConstructedInterpolants, 0 QuantifiedInterpolants, 1854613 SizeOfPredicates, 60 NumberOfNonLiveVariables, 3693 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 23402/27502 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...