./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 a881e1073186594f4727f809fbe5d917ff145543 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 06:32:22,799 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 06:32:22,800 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 06:32:22,808 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 06:32:22,808 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 06:32:22,809 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 06:32:22,809 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 06:32:22,810 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 06:32:22,812 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 06:32:22,812 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 06:32:22,813 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 06:32:22,813 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 06:32:22,814 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 06:32:22,814 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 06:32:22,815 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 06:32:22,816 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 06:32:22,816 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 06:32:22,817 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 06:32:22,819 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 06:32:22,820 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 06:32:22,821 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 06:32:22,822 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 06:32:22,823 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 06:32:22,824 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 06:32:22,824 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 06:32:22,824 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 06:32:22,825 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 06:32:22,826 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 06:32:22,826 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 06:32:22,827 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 06:32:22,827 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 06:32:22,828 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 06:32:22,828 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 06:32:22,828 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 06:32:22,828 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 06:32:22,829 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 06:32:22,829 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 06:32:22,839 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 06:32:22,839 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 06:32:22,840 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 06:32:22,840 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 06:32:22,840 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 06:32:22,840 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 06:32:22,840 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 06:32:22,841 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 06:32:22,841 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 06:32:22,841 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 06:32:22,841 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 06:32:22,841 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 06:32:22,841 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 06:32:22,842 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 06:32:22,842 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 06:32:22,842 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 06:32:22,842 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 06:32:22,842 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 06:32:22,842 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 06:32:22,843 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 06:32:22,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 06:32:22,844 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 06:32:22,844 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 06:32:22,844 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 06:32:22,844 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 06:32:22,844 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 06:32:22,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 06:32:22,844 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 06:32:22,844 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_145d16d4-4044-4ab8-90e5-e3647d170917/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 -> a881e1073186594f4727f809fbe5d917ff145543 [2018-12-02 06:32:22,866 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 06:32:22,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 06:32:22,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 06:32:22,876 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 06:32:22,876 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 06:32:22,877 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/../../sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i [2018-12-02 06:32:22,913 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/data/3c24a6b77/88de4b5e3ef34cbd9183b28dd6c5468d/FLAG4de11f8fe [2018-12-02 06:32:23,347 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 06:32:23,347 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i [2018-12-02 06:32:23,351 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/data/3c24a6b77/88de4b5e3ef34cbd9183b28dd6c5468d/FLAG4de11f8fe [2018-12-02 06:32:23,358 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/data/3c24a6b77/88de4b5e3ef34cbd9183b28dd6c5468d [2018-12-02 06:32:23,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 06:32:23,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 06:32:23,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 06:32:23,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 06:32:23,363 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 06:32:23,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ef9c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23, skipping insertion in model container [2018-12-02 06:32:23,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 06:32:23,379 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 06:32:23,464 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 06:32:23,466 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 06:32:23,475 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 06:32:23,482 INFO L195 MainTranslator]: Completed translation [2018-12-02 06:32:23,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23 WrapperNode [2018-12-02 06:32:23,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 06:32:23,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 06:32:23,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 06:32:23,483 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 06:32:23,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 06:32:23,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 06:32:23,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 06:32:23,499 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 06:32:23,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... [2018-12-02 06:32:23,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 06:32:23,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 06:32:23,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 06:32:23,515 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 06:32:23,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:23,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 06:32:23,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 06:32:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 06:32:23,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 06:32:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 06:32:23,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 06:32:23,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 06:32:23,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 06:32:23,675 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 06:32:23,675 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-02 06:32:23,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:32:23 BoogieIcfgContainer [2018-12-02 06:32:23,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 06:32:23,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 06:32:23,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 06:32:23,678 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 06:32:23,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:32:23" (1/3) ... [2018-12-02 06:32:23,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34234939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:32:23, skipping insertion in model container [2018-12-02 06:32:23,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:32:23" (2/3) ... [2018-12-02 06:32:23,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34234939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:32:23, skipping insertion in model container [2018-12-02 06:32:23,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:32:23" (3/3) ... [2018-12-02 06:32:23,680 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-12-02 06:32:23,686 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 06:32:23,691 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 06:32:23,701 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 06:32:23,720 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 06:32:23,720 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 06:32:23,720 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 06:32:23,720 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 06:32:23,720 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 06:32:23,720 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 06:32:23,720 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 06:32:23,720 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 06:32:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-12-02 06:32:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-02 06:32:23,734 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:23,735 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:23,736 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:23,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:23,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1266359381, now seen corresponding path program 1 times [2018-12-02 06:32:23,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:23,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:23,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:23,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:23,769 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:32:23,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:32:23,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 06:32:23,828 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 06:32:23,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 06:32:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 06:32:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 06:32:23,840 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2018-12-02 06:32:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:23,882 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2018-12-02 06:32:23,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 06:32:23,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-12-02 06:32:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:23,888 INFO L225 Difference]: With dead ends: 45 [2018-12-02 06:32:23,888 INFO L226 Difference]: Without dead ends: 20 [2018-12-02 06:32:23,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 06:32:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-02 06:32:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-12-02 06:32:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-02 06:32:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-02 06:32:23,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-12-02 06:32:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:23,914 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-02 06:32:23,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 06:32:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-02 06:32:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-02 06:32:23,915 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:23,915 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:23,915 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:23,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1008321469, now seen corresponding path program 1 times [2018-12-02 06:32:23,916 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:23,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:23,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:23,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:23,917 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:32:23,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:32:23,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-02 06:32:23,944 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 06:32:23,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 06:32:23,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 06:32:23,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 06:32:23,946 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-12-02 06:32:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:23,969 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-12-02 06:32:23,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 06:32:23,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-12-02 06:32:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:23,970 INFO L225 Difference]: With dead ends: 28 [2018-12-02 06:32:23,971 INFO L226 Difference]: Without dead ends: 19 [2018-12-02 06:32:23,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-02 06:32:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-02 06:32:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-12-02 06:32:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-02 06:32:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-02 06:32:23,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-12-02 06:32:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:23,975 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-02 06:32:23,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 06:32:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-02 06:32:23,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-02 06:32:23,975 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:23,975 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:23,976 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:23,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1823795457, now seen corresponding path program 1 times [2018-12-02 06:32:23,976 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:23,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:23,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:23,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:23,977 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:32:24,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,016 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:24,017 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-02 06:32:24,018 INFO L205 CegarAbsIntRunner]: [0], [4], [8], [12], [18], [20], [26], [28], [30], [34], [41], [44], [46], [52], [53], [54], [56] [2018-12-02 06:32:24,038 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 06:32:24,038 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 06:32:24,155 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 06:32:24,156 INFO L272 AbstractInterpreter]: Visited 17 different actions 41 times. Merged at 6 different actions 13 times. Widened at 1 different actions 1 times. Performed 134 root evaluator evaluations with a maximum evaluation depth of 3. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 5 fixpoints after 2 different actions. Largest state had 10 variables. [2018-12-02 06:32:24,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:24,162 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 06:32:24,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,162 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:24,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:24,168 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:32:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:24,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:32:24,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:32:24,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:24,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-02 06:32:24,253 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:24,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 06:32:24,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 06:32:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-02 06:32:24,253 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-12-02 06:32:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:24,268 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-12-02 06:32:24,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 06:32:24,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-12-02 06:32:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:24,268 INFO L225 Difference]: With dead ends: 31 [2018-12-02 06:32:24,269 INFO L226 Difference]: Without dead ends: 21 [2018-12-02 06:32:24,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-02 06:32:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-02 06:32:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-12-02 06:32:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-02 06:32:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-02 06:32:24,272 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-12-02 06:32:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:24,272 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-02 06:32:24,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 06:32:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-02 06:32:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 06:32:24,272 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:24,272 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:24,273 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:24,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash 478895679, now seen corresponding path program 2 times [2018-12-02 06:32:24,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:24,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,274 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 06:32:24,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,321 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:24,321 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:24,321 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:24,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,321 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:24,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:32:24,328 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:32:24,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-02 06:32:24,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:24,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 06:32:24,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 06:32:24,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:24,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-12-02 06:32:24,401 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 06:32:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 06:32:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-12-02 06:32:24,402 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2018-12-02 06:32:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:24,536 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2018-12-02 06:32:24,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-02 06:32:24,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-02 06:32:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:24,537 INFO L225 Difference]: With dead ends: 54 [2018-12-02 06:32:24,537 INFO L226 Difference]: Without dead ends: 42 [2018-12-02 06:32:24,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2018-12-02 06:32:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-02 06:32:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-12-02 06:32:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-02 06:32:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-02 06:32:24,541 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 19 [2018-12-02 06:32:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:24,541 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-02 06:32:24,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 06:32:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-02 06:32:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-02 06:32:24,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:24,542 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:24,542 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:24,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash -441049109, now seen corresponding path program 3 times [2018-12-02 06:32:24,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:24,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:24,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,543 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 06:32:24,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,597 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:24,597 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:24,597 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:24,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,597 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:24,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:32:24,604 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:32:24,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:32:24,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:24,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 06:32:24,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-02 06:32:24,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:24,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-12-02 06:32:24,704 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:24,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 06:32:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 06:32:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-12-02 06:32:24,704 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-12-02 06:32:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:24,730 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2018-12-02 06:32:24,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 06:32:24,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-12-02 06:32:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:24,731 INFO L225 Difference]: With dead ends: 53 [2018-12-02 06:32:24,731 INFO L226 Difference]: Without dead ends: 37 [2018-12-02 06:32:24,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-12-02 06:32:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-02 06:32:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-12-02 06:32:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-02 06:32:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-12-02 06:32:24,737 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-12-02 06:32:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:24,737 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-12-02 06:32:24,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 06:32:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-12-02 06:32:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 06:32:24,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:24,738 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:24,738 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:24,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1891685973, now seen corresponding path program 4 times [2018-12-02 06:32:24,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:24,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:24,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,740 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-02 06:32:24,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:24,791 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:24,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:24,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:24,791 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:24,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:24,798 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:32:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:24,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-02 06:32:24,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-02 06:32:24,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:24,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2018-12-02 06:32:24,921 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:24,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 06:32:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 06:32:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-12-02 06:32:24,922 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2018-12-02 06:32:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:24,952 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-12-02 06:32:24,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 06:32:24,953 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-12-02 06:32:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:24,953 INFO L225 Difference]: With dead ends: 59 [2018-12-02 06:32:24,953 INFO L226 Difference]: Without dead ends: 41 [2018-12-02 06:32:24,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-12-02 06:32:24,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-02 06:32:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-12-02 06:32:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 06:32:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-12-02 06:32:24,957 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-12-02 06:32:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:24,957 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-12-02 06:32:24,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 06:32:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-12-02 06:32:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-12-02 06:32:24,958 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:24,958 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:24,958 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:24,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -98733461, now seen corresponding path program 5 times [2018-12-02 06:32:24,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:24,959 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-12-02 06:32:25,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,005 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:25,005 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:25,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:25,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,005 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:25,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:32:25,011 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:32:25,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-12-02 06:32:25,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:25,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-02 06:32:25,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 3 proven. 86 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-02 06:32:25,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:25,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-12-02 06:32:25,136 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:25,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 06:32:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 06:32:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-12-02 06:32:25,137 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 15 states. [2018-12-02 06:32:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:25,164 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-12-02 06:32:25,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 06:32:25,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-12-02 06:32:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:25,165 INFO L225 Difference]: With dead ends: 65 [2018-12-02 06:32:25,165 INFO L226 Difference]: Without dead ends: 45 [2018-12-02 06:32:25,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-12-02 06:32:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-02 06:32:25,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-12-02 06:32:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-02 06:32:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-12-02 06:32:25,169 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-12-02 06:32:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:25,169 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-12-02 06:32:25,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 06:32:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-12-02 06:32:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-02 06:32:25,170 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:25,170 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:25,170 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:25,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1878148565, now seen corresponding path program 6 times [2018-12-02 06:32:25,171 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:25,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:25,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,171 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-12-02 06:32:25,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,228 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:25,228 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:25,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:25,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,228 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:25,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:32:25,237 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:32:25,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:32:25,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:25,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-12-02 06:32:25,317 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-12-02 06:32:25,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:25,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-12-02 06:32:25,388 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:25,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 06:32:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 06:32:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-12-02 06:32:25,389 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 17 states. [2018-12-02 06:32:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:25,421 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-12-02 06:32:25,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 06:32:25,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2018-12-02 06:32:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:25,422 INFO L225 Difference]: With dead ends: 71 [2018-12-02 06:32:25,422 INFO L226 Difference]: Without dead ends: 49 [2018-12-02 06:32:25,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-12-02 06:32:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-02 06:32:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-12-02 06:32:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-02 06:32:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-12-02 06:32:25,426 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2018-12-02 06:32:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:25,426 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-12-02 06:32:25,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 06:32:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-12-02 06:32:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-02 06:32:25,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:25,426 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:25,426 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:25,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1034108693, now seen corresponding path program 7 times [2018-12-02 06:32:25,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:25,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:25,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,427 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 115 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-02 06:32:25,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,479 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:25,480 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:25,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:25,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,480 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:25,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:25,485 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:32:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:25,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 115 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-02 06:32:25,553 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 115 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-02 06:32:25,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:25,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-12-02 06:32:25,611 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:25,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-02 06:32:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-02 06:32:25,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-12-02 06:32:25,612 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 19 states. [2018-12-02 06:32:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:25,644 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2018-12-02 06:32:25,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 06:32:25,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2018-12-02 06:32:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:25,645 INFO L225 Difference]: With dead ends: 77 [2018-12-02 06:32:25,645 INFO L226 Difference]: Without dead ends: 53 [2018-12-02 06:32:25,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-12-02 06:32:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-02 06:32:25,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-12-02 06:32:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-02 06:32:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-12-02 06:32:25,650 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2018-12-02 06:32:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:25,650 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-12-02 06:32:25,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-02 06:32:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-12-02 06:32:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-02 06:32:25,651 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:25,651 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:25,652 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:25,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:25,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2048440661, now seen corresponding path program 8 times [2018-12-02 06:32:25,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:25,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:25,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,653 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 147 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-12-02 06:32:25,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,714 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:25,714 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:25,714 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:25,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:25,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:25,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:32:25,722 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:32:25,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-12-02 06:32:25,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:25,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 148 proven. 64 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-12-02 06:32:25,808 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 3 proven. 209 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-12-02 06:32:25,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:25,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-02 06:32:25,885 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:25,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-02 06:32:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-02 06:32:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-12-02 06:32:25,886 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2018-12-02 06:32:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:25,915 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2018-12-02 06:32:25,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 06:32:25,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2018-12-02 06:32:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:25,916 INFO L225 Difference]: With dead ends: 83 [2018-12-02 06:32:25,916 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 06:32:25,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-12-02 06:32:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 06:32:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-12-02 06:32:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-02 06:32:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-12-02 06:32:25,922 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-12-02 06:32:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:25,923 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-12-02 06:32:25,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-02 06:32:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-12-02 06:32:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-02 06:32:25,923 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:25,924 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:25,924 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:25,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:25,924 INFO L82 PathProgramCache]: Analyzing trace with hash -820376725, now seen corresponding path program 9 times [2018-12-02 06:32:25,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:25,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:25,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:25,925 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 183 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-12-02 06:32:26,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,002 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:26,002 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:26,002 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:26,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,002 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:26,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:32:26,008 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:32:26,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:32:26,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:26,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 183 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-12-02 06:32:26,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 183 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-12-02 06:32:26,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:26,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2018-12-02 06:32:26,173 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:26,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-02 06:32:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-02 06:32:26,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-12-02 06:32:26,174 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2018-12-02 06:32:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:26,214 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-12-02 06:32:26,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 06:32:26,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2018-12-02 06:32:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:26,215 INFO L225 Difference]: With dead ends: 89 [2018-12-02 06:32:26,215 INFO L226 Difference]: Without dead ends: 61 [2018-12-02 06:32:26,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-12-02 06:32:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-02 06:32:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-12-02 06:32:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-02 06:32:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-12-02 06:32:26,219 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2018-12-02 06:32:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:26,220 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-12-02 06:32:26,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-02 06:32:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-12-02 06:32:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-02 06:32:26,220 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:26,220 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:26,220 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:26,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 233951019, now seen corresponding path program 10 times [2018-12-02 06:32:26,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:26,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:26,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,221 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-12-02 06:32:26,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,256 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:26,256 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:26,256 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:26,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,256 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:26,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:26,263 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:32:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-12-02 06:32:26,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-12-02 06:32:26,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:26,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-12-02 06:32:26,345 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:26,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 06:32:26,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 06:32:26,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-02 06:32:26,346 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 9 states. [2018-12-02 06:32:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:26,375 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-12-02 06:32:26,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 06:32:26,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2018-12-02 06:32:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:26,376 INFO L225 Difference]: With dead ends: 109 [2018-12-02 06:32:26,376 INFO L226 Difference]: Without dead ends: 104 [2018-12-02 06:32:26,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-02 06:32:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-02 06:32:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2018-12-02 06:32:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-12-02 06:32:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2018-12-02 06:32:26,383 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 58 [2018-12-02 06:32:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:26,383 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2018-12-02 06:32:26,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 06:32:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2018-12-02 06:32:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-02 06:32:26,384 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:26,384 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:26,384 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:26,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:26,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1348099759, now seen corresponding path program 11 times [2018-12-02 06:32:26,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:26,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:26,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,385 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-12-02 06:32:26,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,434 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:26,435 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:26,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:26,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,435 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:26,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:32:26,444 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:32:26,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-12-02 06:32:26,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:26,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-12-02 06:32:26,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-12-02 06:32:26,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:26,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-12-02 06:32:26,575 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:26,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 06:32:26,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 06:32:26,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-12-02 06:32:26,575 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 11 states. [2018-12-02 06:32:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:26,608 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-12-02 06:32:26,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 06:32:26,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2018-12-02 06:32:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:26,609 INFO L225 Difference]: With dead ends: 132 [2018-12-02 06:32:26,609 INFO L226 Difference]: Without dead ends: 127 [2018-12-02 06:32:26,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-12-02 06:32:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-12-02 06:32:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2018-12-02 06:32:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-02 06:32:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2018-12-02 06:32:26,620 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 81 [2018-12-02 06:32:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:26,620 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2018-12-02 06:32:26,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 06:32:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2018-12-02 06:32:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-12-02 06:32:26,620 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:26,620 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:26,621 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:26,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1467049301, now seen corresponding path program 12 times [2018-12-02 06:32:26,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:26,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:26,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,621 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-02 06:32:26,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,688 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:26,688 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:26,689 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:26,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/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 [2018-12-02 06:32:26,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:32:26,697 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:32:26,723 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:32:26,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:26,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-02 06:32:26,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-02 06:32:26,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:26,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2018-12-02 06:32:26,847 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:26,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 06:32:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 06:32:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-12-02 06:32:26,848 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 13 states. [2018-12-02 06:32:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:26,877 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-12-02 06:32:26,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 06:32:26,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2018-12-02 06:32:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:26,878 INFO L225 Difference]: With dead ends: 155 [2018-12-02 06:32:26,878 INFO L226 Difference]: Without dead ends: 150 [2018-12-02 06:32:26,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-12-02 06:32:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-12-02 06:32:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 128. [2018-12-02 06:32:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-12-02 06:32:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2018-12-02 06:32:26,886 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 104 [2018-12-02 06:32:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:26,886 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2018-12-02 06:32:26,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 06:32:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2018-12-02 06:32:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-12-02 06:32:26,887 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:26,887 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:26,887 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:26,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1018125521, now seen corresponding path program 13 times [2018-12-02 06:32:26,888 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:26,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:26,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:26,888 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-12-02 06:32:26,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:26,954 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:26,954 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:26,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:26,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:32:26,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:26,961 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:32:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:26,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-12-02 06:32:27,041 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-12-02 06:32:27,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:27,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-12-02 06:32:27,112 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:27,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 06:32:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 06:32:27,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-12-02 06:32:27,113 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 15 states. [2018-12-02 06:32:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:27,159 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2018-12-02 06:32:27,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 06:32:27,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 127 [2018-12-02 06:32:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:27,160 INFO L225 Difference]: With dead ends: 178 [2018-12-02 06:32:27,160 INFO L226 Difference]: Without dead ends: 173 [2018-12-02 06:32:27,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-12-02 06:32:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-02 06:32:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 151. [2018-12-02 06:32:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-12-02 06:32:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2018-12-02 06:32:27,180 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 127 [2018-12-02 06:32:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:27,180 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2018-12-02 06:32:27,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 06:32:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2018-12-02 06:32:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-12-02 06:32:27,181 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:27,181 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:27,181 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:27,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1416411605, now seen corresponding path program 14 times [2018-12-02 06:32:27,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:27,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:27,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:27,183 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-12-02 06:32:27,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:27,287 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:27,287 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:27,287 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:27,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:27,287 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:32:27,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:32:27,294 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:32:27,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-12-02 06:32:27,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:27,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-12-02 06:32:27,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-12-02 06:32:27,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:27,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-12-02 06:32:27,547 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:27,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 06:32:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 06:32:27,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-12-02 06:32:27,547 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand 17 states. [2018-12-02 06:32:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:27,582 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2018-12-02 06:32:27,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 06:32:27,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2018-12-02 06:32:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:27,583 INFO L225 Difference]: With dead ends: 201 [2018-12-02 06:32:27,583 INFO L226 Difference]: Without dead ends: 196 [2018-12-02 06:32:27,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 286 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-12-02 06:32:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-12-02 06:32:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 174. [2018-12-02 06:32:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-02 06:32:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 181 transitions. [2018-12-02 06:32:27,595 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 181 transitions. Word has length 150 [2018-12-02 06:32:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:27,595 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 181 transitions. [2018-12-02 06:32:27,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 06:32:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 181 transitions. [2018-12-02 06:32:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-12-02 06:32:27,596 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:27,596 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:27,596 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:27,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1492973649, now seen corresponding path program 15 times [2018-12-02 06:32:27,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:27,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:27,597 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2018-12-02 06:32:27,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:27,720 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:27,720 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:27,720 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:27,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:27,720 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:32:27,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 06:32:27,727 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 06:32:27,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 06:32:27,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:27,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2018-12-02 06:32:27,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2018-12-02 06:32:27,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:27,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-12-02 06:32:27,941 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:27,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-02 06:32:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-02 06:32:27,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-12-02 06:32:27,941 INFO L87 Difference]: Start difference. First operand 174 states and 181 transitions. Second operand 19 states. [2018-12-02 06:32:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:27,976 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2018-12-02 06:32:27,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 06:32:27,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 173 [2018-12-02 06:32:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:27,977 INFO L225 Difference]: With dead ends: 224 [2018-12-02 06:32:27,977 INFO L226 Difference]: Without dead ends: 219 [2018-12-02 06:32:27,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 330 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-12-02 06:32:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-12-02 06:32:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-12-02 06:32:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-12-02 06:32:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-12-02 06:32:27,991 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 173 [2018-12-02 06:32:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:27,992 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-12-02 06:32:27,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-02 06:32:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-12-02 06:32:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-12-02 06:32:27,993 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:27,993 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:27,993 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:27,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1547162027, now seen corresponding path program 16 times [2018-12-02 06:32:27,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:27,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:27,994 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-12-02 06:32:28,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:28,115 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:28,115 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:28,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:28,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:28,115 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:32:28,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:28,121 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 06:32:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:28,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-12-02 06:32:28,261 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-12-02 06:32:28,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:28,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-02 06:32:28,383 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:28,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-02 06:32:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-02 06:32:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-12-02 06:32:28,383 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 21 states. [2018-12-02 06:32:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:28,428 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2018-12-02 06:32:28,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 06:32:28,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 196 [2018-12-02 06:32:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:28,429 INFO L225 Difference]: With dead ends: 247 [2018-12-02 06:32:28,429 INFO L226 Difference]: Without dead ends: 242 [2018-12-02 06:32:28,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 374 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-12-02 06:32:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-12-02 06:32:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2018-12-02 06:32:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-12-02 06:32:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 229 transitions. [2018-12-02 06:32:28,445 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 229 transitions. Word has length 196 [2018-12-02 06:32:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 229 transitions. [2018-12-02 06:32:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-02 06:32:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 229 transitions. [2018-12-02 06:32:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-12-02 06:32:28,446 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:28,446 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:28,447 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:28,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1463389231, now seen corresponding path program 17 times [2018-12-02 06:32:28,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:28,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:28,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:32:28,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:28,447 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-12-02 06:32:28,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:28,567 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 06:32:28,568 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 06:32:28,568 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 06:32:28,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:32:28,568 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 06:32:28,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 06:32:28,573 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 06:32:28,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-12-02 06:32:28,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:32:28,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:32:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-12-02 06:32:28,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 06:32:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-12-02 06:32:28,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 06:32:28,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2018-12-02 06:32:28,952 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 06:32:28,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-02 06:32:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-02 06:32:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-12-02 06:32:28,953 INFO L87 Difference]: Start difference. First operand 220 states and 229 transitions. Second operand 23 states. [2018-12-02 06:32:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:29,028 INFO L93 Difference]: Finished difference Result 270 states and 281 transitions. [2018-12-02 06:32:29,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 06:32:29,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 219 [2018-12-02 06:32:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:29,029 INFO L225 Difference]: With dead ends: 270 [2018-12-02 06:32:29,029 INFO L226 Difference]: Without dead ends: 265 [2018-12-02 06:32:29,029 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 418 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-12-02 06:32:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-12-02 06:32:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2018-12-02 06:32:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-12-02 06:32:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 253 transitions. [2018-12-02 06:32:29,053 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 253 transitions. Word has length 219 [2018-12-02 06:32:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:29,053 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 253 transitions. [2018-12-02 06:32:29,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-02 06:32:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 253 transitions. [2018-12-02 06:32:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-12-02 06:32:29,054 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:32:29,054 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:32:29,054 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:32:29,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:32:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1649132245, now seen corresponding path program 18 times [2018-12-02 06:32:29,054 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 06:32:29,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:29,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:32:29,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:32:29,055 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 06:32:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:32:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-02 06:32:31,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:32:31,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-12-02 06:32:31,534 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 06:32:31,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-12-02 06:32:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-12-02 06:32:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-12-02 06:32:31,536 INFO L87 Difference]: Start difference. First operand 243 states and 253 transitions. Second operand 105 states. [2018-12-02 06:32:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:32:32,844 INFO L93 Difference]: Finished difference Result 9783 states and 10243 transitions. [2018-12-02 06:32:32,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-12-02 06:32:32,844 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 242 [2018-12-02 06:32:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:32:32,844 INFO L225 Difference]: With dead ends: 9783 [2018-12-02 06:32:32,844 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 06:32:32,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-12-02 06:32:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 06:32:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 06:32:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 06:32:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 06:32:32,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 242 [2018-12-02 06:32:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:32:32,856 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 06:32:32,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-12-02 06:32:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 06:32:32,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 06:32:32,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 06:32:33,628 WARN L180 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-12-02 06:32:36,682 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,687 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,691 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,697 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,729 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,740 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,749 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,760 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,767 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,769 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,837 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,884 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,907 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:36,998 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,024 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,044 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,098 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,669 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,701 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,727 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,765 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,815 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,835 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,918 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:37,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,123 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,408 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,423 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,492 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,532 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,599 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:38,896 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,003 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,395 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,401 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,829 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:39,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,003 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,270 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,677 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,685 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,769 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:40,947 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:41,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:41,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:41,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:41,958 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:42,292 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:42,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:42,417 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:42,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:42,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:42,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:43,075 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:43,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:43,777 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:43,878 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:44,355 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:44,489 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:44,569 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:44,581 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:45,018 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:45,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:45,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:45,891 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:45,928 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,637 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,682 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,854 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,957 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:46,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:47,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:47,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:47,982 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:47,994 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:48,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:48,249 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:48,273 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:48,494 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:49,017 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:49,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:49,171 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:49,437 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:49,872 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:49,949 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:50,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:50,843 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:51,678 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:52,467 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:53,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:53,234 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:53,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:53,796 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,124 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,210 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,599 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:54,938 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:56,021 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:56,036 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:56,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:56,187 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:57,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:57,884 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:58,102 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:58,149 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:58,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:58,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:58,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:59,023 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:59,212 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:59,275 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:32:59,958 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:00,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:00,908 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:00,940 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:01,477 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:01,660 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:02,916 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:02,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:03,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:03,474 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:04,389 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:04,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:04,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:05,407 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:05,545 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:05,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:05,719 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:05,823 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:06,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:06,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:06,882 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:07,092 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:09,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:09,684 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:09,775 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:09,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:10,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:11,958 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:13,007 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:14,601 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:16,764 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:19,466 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:24,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:25,801 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:26,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:26,512 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:28,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:29,172 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:30,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:33,404 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:39,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 06:33:44,593 WARN L180 SmtUtils]: Spent 1.18 m on a formula simplification. DAG size of input: 5173 DAG size of output: 2371 [2018-12-02 06:33:47,779 WARN L180 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 [2018-12-02 06:34:43,235 WARN L180 SmtUtils]: Spent 55.45 s on a formula simplification. DAG size of input: 2349 DAG size of output: 364 [2018-12-02 06:34:43,238 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 06:34:43,238 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 06:34:43,238 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 06:34:43,238 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 06:34:43,238 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 06:34:43,238 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 06:34:43,238 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-12-02 06:34:43,238 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-12-02 06:34:43,238 INFO L448 ceAbstractionStarter]: For program point L17-2(lines 17 21) no Hoare annotation was computed. [2018-12-02 06:34:43,238 INFO L444 ceAbstractionStarter]: At program point L17-3(lines 17 21) the Hoare annotation is: (let ((.cse0 (<= 10 main_~m~0)) (.cse1 (<= 10 main_~n~0))) (or (and (<= 30 main_~k~0) (<= main_~i~0 3) .cse0 .cse1) (and .cse0 (<= 100 main_~k~0) .cse1) (and .cse0 (<= 40 main_~k~0) (<= main_~i~0 4) .cse1) (and .cse0 (<= 0 main_~k~0) (<= main_~i~0 0) .cse1) (and .cse0 (<= 60 main_~k~0) (<= main_~i~0 6) .cse1) (and .cse0 (<= 10 main_~k~0) (<= main_~i~0 1) .cse1) (and (<= 80 main_~k~0) .cse0 (<= main_~i~0 8) .cse1) (and (<= 50 main_~k~0) .cse0 (<= main_~i~0 5) .cse1) (and .cse0 (<= main_~i~0 9) .cse1 (<= 90 main_~k~0)) (and (<= 70 main_~k~0) .cse0 (<= main_~i~0 7) .cse1) (and .cse0 (<= 20 main_~k~0) (<= main_~i~0 2) .cse1))) [2018-12-02 06:34:43,239 INFO L444 ceAbstractionStarter]: At program point L17-4(lines 17 21) the Hoare annotation is: (and (<= 10 main_~m~0) (<= 100 main_~k~0) (<= 10 main_~n~0)) [2018-12-02 06:34:43,239 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-12-02 06:34:43,239 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-12-02 06:34:43,239 INFO L448 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-12-02 06:34:43,239 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-12-02 06:34:43,239 INFO L448 ceAbstractionStarter]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2018-12-02 06:34:43,240 INFO L444 ceAbstractionStarter]: At program point L18-3(lines 18 20) the Hoare annotation is: (let ((.cse8 (<= 10 main_~m~0)) (.cse15 (<= main_~j~0 7))) (let ((.cse18 (<= main_~j~0 3)) (.cse34 (<= main_~j~0 9)) (.cse31 (<= main_~j~0 0)) (.cse26 (<= main_~j~0 4)) (.cse7 (<= main_~j~0 5)) (.cse20 (<= main_~j~0 8)) (.cse35 (<= main_~j~0 1)) (.cse39 (<= main_~j~0 2)) (.cse30 (<= main_~j~0 6)) (.cse3 (and .cse8 .cse15)) (.cse2 (<= 10 main_~n~0))) (let ((.cse25 (<= 40 main_~k~0)) (.cse16 (<= 80 main_~k~0)) (.cse33 (and .cse3 .cse2)) (.cse38 (<= 10 main_~k~0)) (.cse37 (<= 70 main_~k~0)) (.cse21 (<= main_~i~0 0)) (.cse12 (<= 30 main_~k~0)) (.cse13 (<= main_~i~0 3)) (.cse22 (and .cse8 .cse30)) (.cse36 (<= 20 main_~k~0)) (.cse27 (and .cse8 .cse39)) (.cse6 (and .cse8 .cse35 .cse2)) (.cse40 (<= 60 main_~k~0)) (.cse32 (and .cse8 .cse2)) (.cse4 (<= main_~i~0 6)) (.cse10 (<= main_~i~0 4)) (.cse23 (and .cse20 .cse8)) (.cse0 (and .cse7 .cse8)) (.cse28 (and .cse8 .cse26 .cse2)) (.cse1 (<= main_~i~0 7)) (.cse9 (<= main_~i~0 1)) (.cse41 (<= 50 main_~k~0)) (.cse5 (<= (+ main_~i~0 1) main_~n~0)) (.cse14 (and .cse8 .cse31)) (.cse42 (<= 90 main_~k~0)) (.cse19 (<= main_~i~0 2)) (.cse17 (<= main_~i~0 8)) (.cse24 (and .cse8 .cse34)) (.cse11 (<= main_~i~0 5)) (.cse29 (and .cse8 .cse18))) (or (and (<= 75 main_~k~0) .cse0 .cse1 .cse2) (and (<= 67 main_~k~0) .cse3 .cse4 .cse2) (and (and .cse5 .cse6) (<= 91 main_~k~0)) (and .cse7 .cse8 (<= 15 main_~k~0) .cse9 .cse2) (and .cse0 (<= 45 main_~k~0) .cse10 .cse2) (and .cse11 .cse6 (<= 51 main_~k~0)) (and .cse12 .cse13 .cse14 .cse2) (and .cse8 .cse9 (<= 17 main_~k~0) .cse15 .cse2) (and .cse16 .cse14 .cse17 .cse2) (and (<= 23 main_~k~0) .cse8 .cse18 .cse19 .cse2) (and .cse20 .cse8 (<= 8 main_~k~0) .cse21 .cse2) (and (<= 66 main_~k~0) .cse22 .cse4 .cse2) (and .cse22 .cse10 (<= 46 main_~k~0) .cse2) (and .cse13 (<= 38 main_~k~0) .cse23 .cse2) (and (<= 86 main_~k~0) .cse22 .cse17 .cse2) (and .cse24 .cse10 (<= 49 main_~k~0) .cse2) (and .cse25 .cse14 .cse10 .cse2) (and .cse6 .cse10 (<= 41 main_~k~0)) (and (<= 69 main_~k~0) .cse24 .cse4 .cse2) (and .cse8 .cse26 .cse21 (<= 4 main_~k~0) .cse2) (and .cse27 .cse1 (<= 72 main_~k~0) .cse2) (and .cse28 (<= 84 main_~k~0) .cse17) (and (<= 82 main_~k~0) .cse27 .cse17 .cse2) (and (<= 63 main_~k~0) .cse29 .cse4 .cse2) (and .cse8 (<= 6 main_~k~0) .cse21 .cse2 .cse30) (and .cse8 (<= 0 main_~k~0) .cse31 .cse21 .cse2) (and (and .cse5 .cse0 .cse2) (<= 95 main_~k~0)) (and (and .cse32 .cse5) (<= 100 main_~k~0)) (and (and .cse5 .cse33) (<= 97 main_~k~0)) (and (and .cse5 .cse29 .cse2) (<= 93 main_~k~0)) (and .cse10 .cse28 (<= 44 main_~k~0)) (and .cse8 (<= 9 main_~k~0) .cse34 .cse21 .cse2) (and (<= 21 main_~k~0) .cse8 .cse35 .cse19 .cse2) (and .cse0 (<= 55 main_~k~0) .cse11 .cse2) (and (and .cse5 .cse22 .cse2) (<= 96 main_~k~0)) (and .cse10 .cse27 (<= 42 main_~k~0) .cse2) (and .cse13 .cse25 .cse8 .cse2) (and .cse22 .cse1 .cse2 (<= 76 main_~k~0)) (and .cse8 .cse36 .cse9 .cse2) (and .cse29 .cse1 .cse2 (<= 73 main_~k~0)) (and (<= 56 main_~k~0) .cse22 .cse11 .cse2) (and (<= 54 main_~k~0) .cse28 .cse11) (and .cse37 .cse14 .cse1 .cse2) (and .cse13 (<= 32 main_~k~0) .cse27 .cse2) (and .cse23 .cse17 .cse2 (<= 88 main_~k~0)) (and .cse8 .cse38 .cse21 .cse2) (and (<= 59 main_~k~0) .cse24 .cse11 .cse2) (and .cse11 .cse3 .cse2 (<= 57 main_~k~0)) (and .cse33 .cse1 (<= 77 main_~k~0)) (and .cse8 .cse35 .cse21 .cse2 (<= 1 main_~k~0)) (and .cse13 .cse8 .cse35 .cse2 (<= 31 main_~k~0)) (and .cse8 (<= 22 main_~k~0) .cse19 .cse39 .cse2) (and (and .cse5 .cse23 .cse2) (<= 98 main_~k~0)) (and .cse40 .cse14 .cse4 .cse2) (and (<= 11 main_~k~0) .cse8 .cse35 .cse9 .cse2) (and .cse7 .cse8 (<= 5 main_~k~0) .cse21 .cse2) (and .cse16 .cse32 .cse1) (and .cse13 .cse0 (<= 35 main_~k~0) .cse2) (and .cse8 (<= 29 main_~k~0) .cse19 .cse34 .cse2) (and (<= 37 main_~k~0) .cse13 .cse3 .cse2) (and .cse17 (<= 87 main_~k~0) .cse33) (and (<= 26 main_~k~0) .cse8 .cse19 .cse2 .cse30) (and .cse10 .cse29 (<= 43 main_~k~0) .cse2) (and .cse41 .cse8 .cse10 .cse2) (and (and .cse5 .cse28) (<= 94 main_~k~0)) (and .cse23 (<= 78 main_~k~0) .cse1 .cse2) (and (<= 33 main_~k~0) .cse13 .cse29 .cse2) (and .cse8 .cse38 .cse9 .cse31 .cse2) (and .cse6 .cse4 (<= 61 main_~k~0)) (and (<= 92 main_~k~0) (and .cse5 .cse27 .cse2)) (and .cse7 .cse8 (<= 25 main_~k~0) .cse19 .cse2) (and .cse8 (<= 7 main_~k~0) .cse15 .cse21 .cse2) (and .cse37 .cse8 .cse4 .cse2) (and .cse8 .cse18 (<= 3 main_~k~0) .cse21 .cse2) (and (<= 2 main_~k~0) .cse8 .cse39 .cse21 .cse2) (and .cse13 .cse28 (<= 34 main_~k~0)) (and (<= 83 main_~k~0) .cse29 .cse17 .cse2) (and .cse24 .cse1 (<= 79 main_~k~0) .cse2) (and .cse13 .cse24 (<= 39 main_~k~0) .cse2) (and .cse6 (<= 71 main_~k~0) .cse1) (and .cse12 .cse8 .cse19 .cse2) (and .cse23 (<= 68 main_~k~0) .cse4 .cse2) (and (<= 58 main_~k~0) .cse23 .cse11 .cse2) (and .cse8 .cse19 .cse26 .cse2 (<= 24 main_~k~0)) (and .cse13 (<= 36 main_~k~0) .cse22 .cse2) (and .cse0 (<= 65 main_~k~0) .cse4 .cse2) (and .cse8 .cse9 .cse39 (<= 12 main_~k~0) .cse2) (and .cse8 .cse36 .cse19 .cse31 .cse2) (and (<= 14 main_~k~0) .cse8 .cse9 .cse26 .cse2) (and .cse27 (<= 62 main_~k~0) .cse4 .cse2) (and .cse27 .cse11 (<= 52 main_~k~0) .cse2) (and (<= 81 main_~k~0) .cse17 .cse6) (and .cse8 .cse9 .cse34 .cse2 (<= 19 main_~k~0)) (and .cse10 (<= 47 main_~k~0) .cse3 .cse2) (and .cse8 .cse40 .cse11 .cse2) (and .cse32 .cse17 .cse42) (and (<= 64 main_~k~0) .cse28 .cse4) (and (<= 99 main_~k~0) (and .cse5 .cse24 .cse2)) (and .cse10 (<= 48 main_~k~0) .cse23 .cse2) (and (<= 28 main_~k~0) .cse20 .cse8 .cse19 .cse2) (and .cse8 .cse18 .cse9 (<= 13 main_~k~0) .cse2) (and .cse20 .cse8 (<= 18 main_~k~0) .cse9 .cse2) (and .cse0 (<= 85 main_~k~0) .cse17 .cse2) (and (<= 74 main_~k~0) .cse28 .cse1) (and (<= 16 main_~k~0) .cse8 .cse9 .cse2 .cse30) (and .cse41 .cse14 .cse11 .cse2) (and (and .cse5 .cse14 .cse2) .cse42) (and .cse8 .cse19 .cse15 .cse2 (<= 27 main_~k~0)) (and (<= 89 main_~k~0) .cse17 .cse24 .cse2) (and (<= 53 main_~k~0) .cse11 .cse29 .cse2))))) [2018-12-02 06:34:43,240 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-02 06:34:43,240 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-02 06:34:43,240 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-02 06:34:43,240 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-02 06:34:43,240 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-02 06:34:43,240 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-02 06:34:43,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:34:43 BoogieIcfgContainer [2018-12-02 06:34:43,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 06:34:43,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 06:34:43,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 06:34:43,262 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 06:34:43,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:32:23" (3/4) ... [2018-12-02 06:34:43,266 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 06:34:43,271 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 06:34:43,271 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 06:34:43,271 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-02 06:34:43,274 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-12-02 06:34:43,274 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-02 06:34:43,274 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 06:34:43,305 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_145d16d4-4044-4ab8-90e5-e3647d170917/bin-2019/utaipan/witness.graphml [2018-12-02 06:34:43,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 06:34:43,305 INFO L168 Benchmark]: Toolchain (without parser) took 139945.03 ms. Allocated memory was 1.0 GB in the beginning and 4.4 GB in the end (delta: 3.4 GB). Free memory was 958.8 MB in the beginning and 2.7 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.7 GB. Max. memory is 11.5 GB. [2018-12-02 06:34:43,306 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:34:43,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.81 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 947.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-02 06:34:43,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.60 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:34:43,307 INFO L168 Benchmark]: Boogie Preprocessor took 15.60 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:34:43,307 INFO L168 Benchmark]: RCFGBuilder took 160.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-02 06:34:43,307 INFO L168 Benchmark]: TraceAbstraction took 139585.87 ms. Allocated memory was 1.2 GB in the beginning and 4.4 GB in the end (delta: 3.3 GB). Free memory was 1.1 GB in the beginning and 2.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.2 GB. Max. memory is 11.5 GB. [2018-12-02 06:34:43,308 INFO L168 Benchmark]: Witness Printer took 42.63 ms. Allocated memory is still 4.4 GB. Free memory is still 2.7 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:34:43,309 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 121.81 ms. Allocated memory is still 1.0 GB. Free memory was 958.8 MB in the beginning and 947.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.60 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.60 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 160.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 139585.87 ms. Allocated memory was 1.2 GB in the beginning and 4.4 GB in the end (delta: 3.3 GB). Free memory was 1.1 GB in the beginning and 2.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 4.2 GB. Max. memory is 11.5 GB. * Witness Printer took 42.63 ms. Allocated memory is still 4.4 GB. Free memory is still 2.7 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((((((((30 <= k && i <= 3) && 10 <= m) && 10 <= n) || ((10 <= m && 100 <= k) && 10 <= n)) || (((10 <= m && 40 <= k) && i <= 4) && 10 <= n)) || (((10 <= m && 0 <= k) && i <= 0) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 6) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 1) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 8) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 5) && 10 <= n)) || (((10 <= m && i <= 9) && 10 <= n) && 90 <= k)) || (((70 <= k && 10 <= m) && i <= 7) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 2) && 10 <= n) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((75 <= k && j <= 5 && 10 <= m) && i <= 7) && 10 <= n) || (((67 <= k && 10 <= m && j <= 7) && i <= 6) && 10 <= n)) || ((i + 1 <= n && (10 <= m && j <= 1) && 10 <= n) && 91 <= k)) || ((((j <= 5 && 10 <= m) && 15 <= k) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 45 <= k) && i <= 4) && 10 <= n)) || ((i <= 5 && (10 <= m && j <= 1) && 10 <= n) && 51 <= k)) || (((30 <= k && i <= 3) && 10 <= m && j <= 0) && 10 <= n)) || ((((10 <= m && i <= 1) && 17 <= k) && j <= 7) && 10 <= n)) || (((80 <= k && 10 <= m && j <= 0) && i <= 8) && 10 <= n)) || ((((23 <= k && 10 <= m) && j <= 3) && i <= 2) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 8 <= k) && i <= 0) && 10 <= n)) || (((66 <= k && 10 <= m && j <= 6) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 6) && i <= 4) && 46 <= k) && 10 <= n)) || (((i <= 3 && 38 <= k) && j <= 8 && 10 <= m) && 10 <= n)) || (((86 <= k && 10 <= m && j <= 6) && i <= 8) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 4) && 49 <= k) && 10 <= n)) || (((40 <= k && 10 <= m && j <= 0) && i <= 4) && 10 <= n)) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 4) && 41 <= k)) || (((69 <= k && 10 <= m && j <= 9) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 4) && i <= 0) && 4 <= k) && 10 <= n)) || ((((10 <= m && j <= 2) && i <= 7) && 72 <= k) && 10 <= n)) || ((((10 <= m && j <= 4) && 10 <= n) && 84 <= k) && i <= 8)) || (((82 <= k && 10 <= m && j <= 2) && i <= 8) && 10 <= n)) || (((63 <= k && 10 <= m && j <= 3) && i <= 6) && 10 <= n)) || ((((10 <= m && 6 <= k) && i <= 0) && 10 <= n) && j <= 6)) || ((((10 <= m && 0 <= k) && j <= 0) && i <= 0) && 10 <= n)) || (((i + 1 <= n && j <= 5 && 10 <= m) && 10 <= n) && 95 <= k)) || (((10 <= m && 10 <= n) && i + 1 <= n) && 100 <= k)) || ((i + 1 <= n && (10 <= m && j <= 7) && 10 <= n) && 97 <= k)) || (((i + 1 <= n && 10 <= m && j <= 3) && 10 <= n) && 93 <= k)) || ((i <= 4 && (10 <= m && j <= 4) && 10 <= n) && 44 <= k)) || ((((10 <= m && 9 <= k) && j <= 9) && i <= 0) && 10 <= n)) || ((((21 <= k && 10 <= m) && j <= 1) && i <= 2) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 55 <= k) && i <= 5) && 10 <= n)) || (((i + 1 <= n && 10 <= m && j <= 6) && 10 <= n) && 96 <= k)) || (((i <= 4 && 10 <= m && j <= 2) && 42 <= k) && 10 <= n)) || (((i <= 3 && 40 <= k) && 10 <= m) && 10 <= n)) || ((((10 <= m && j <= 6) && i <= 7) && 10 <= n) && 76 <= k)) || (((10 <= m && 20 <= k) && i <= 1) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 7) && 10 <= n) && 73 <= k)) || (((56 <= k && 10 <= m && j <= 6) && i <= 5) && 10 <= n)) || ((54 <= k && (10 <= m && j <= 4) && 10 <= n) && i <= 5)) || (((70 <= k && 10 <= m && j <= 0) && i <= 7) && 10 <= n)) || (((i <= 3 && 32 <= k) && 10 <= m && j <= 2) && 10 <= n)) || ((((j <= 8 && 10 <= m) && i <= 8) && 10 <= n) && 88 <= k)) || (((10 <= m && 10 <= k) && i <= 0) && 10 <= n)) || (((59 <= k && 10 <= m && j <= 9) && i <= 5) && 10 <= n)) || (((i <= 5 && 10 <= m && j <= 7) && 10 <= n) && 57 <= k)) || ((((10 <= m && j <= 7) && 10 <= n) && i <= 7) && 77 <= k)) || ((((10 <= m && j <= 1) && i <= 0) && 10 <= n) && 1 <= k)) || ((((i <= 3 && 10 <= m) && j <= 1) && 10 <= n) && 31 <= k)) || ((((10 <= m && 22 <= k) && i <= 2) && j <= 2) && 10 <= n)) || (((i + 1 <= n && j <= 8 && 10 <= m) && 10 <= n) && 98 <= k)) || (((60 <= k && 10 <= m && j <= 0) && i <= 6) && 10 <= n)) || ((((11 <= k && 10 <= m) && j <= 1) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 5 <= k) && i <= 0) && 10 <= n)) || ((80 <= k && 10 <= m && 10 <= n) && i <= 7)) || (((i <= 3 && j <= 5 && 10 <= m) && 35 <= k) && 10 <= n)) || ((((10 <= m && 29 <= k) && i <= 2) && j <= 9) && 10 <= n)) || (((37 <= k && i <= 3) && 10 <= m && j <= 7) && 10 <= n)) || ((i <= 8 && 87 <= k) && (10 <= m && j <= 7) && 10 <= n)) || ((((26 <= k && 10 <= m) && i <= 2) && 10 <= n) && j <= 6)) || (((i <= 4 && 10 <= m && j <= 3) && 43 <= k) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 4) && 10 <= n)) || ((i + 1 <= n && (10 <= m && j <= 4) && 10 <= n) && 94 <= k)) || ((((j <= 8 && 10 <= m) && 78 <= k) && i <= 7) && 10 <= n)) || (((33 <= k && i <= 3) && 10 <= m && j <= 3) && 10 <= n)) || ((((10 <= m && 10 <= k) && i <= 1) && j <= 0) && 10 <= n)) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 6) && 61 <= k)) || (92 <= k && (i + 1 <= n && 10 <= m && j <= 2) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 25 <= k) && i <= 2) && 10 <= n)) || ((((10 <= m && 7 <= k) && j <= 7) && i <= 0) && 10 <= n)) || (((70 <= k && 10 <= m) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 3) && 3 <= k) && i <= 0) && 10 <= n)) || ((((2 <= k && 10 <= m) && j <= 2) && i <= 0) && 10 <= n)) || ((i <= 3 && (10 <= m && j <= 4) && 10 <= n) && 34 <= k)) || (((83 <= k && 10 <= m && j <= 3) && i <= 8) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 7) && 79 <= k) && 10 <= n)) || (((i <= 3 && 10 <= m && j <= 9) && 39 <= k) && 10 <= n)) || ((((10 <= m && j <= 1) && 10 <= n) && 71 <= k) && i <= 7)) || (((30 <= k && 10 <= m) && i <= 2) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 68 <= k) && i <= 6) && 10 <= n)) || (((58 <= k && j <= 8 && 10 <= m) && i <= 5) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 4) && 10 <= n) && 24 <= k)) || (((i <= 3 && 36 <= k) && 10 <= m && j <= 6) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 65 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 2) && 12 <= k) && 10 <= n)) || ((((10 <= m && 20 <= k) && i <= 2) && j <= 0) && 10 <= n)) || ((((14 <= k && 10 <= m) && i <= 1) && j <= 4) && 10 <= n)) || ((((10 <= m && j <= 2) && 62 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 2) && i <= 5) && 52 <= k) && 10 <= n)) || ((81 <= k && i <= 8) && (10 <= m && j <= 1) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 9) && 10 <= n) && 19 <= k)) || (((i <= 4 && 47 <= k) && 10 <= m && j <= 7) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 5) && 10 <= n)) || (((10 <= m && 10 <= n) && i <= 8) && 90 <= k)) || ((64 <= k && (10 <= m && j <= 4) && 10 <= n) && i <= 6)) || (99 <= k && (i + 1 <= n && 10 <= m && j <= 9) && 10 <= n)) || (((i <= 4 && 48 <= k) && j <= 8 && 10 <= m) && 10 <= n)) || ((((28 <= k && j <= 8) && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 1) && 13 <= k) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 18 <= k) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 85 <= k) && i <= 8) && 10 <= n)) || ((74 <= k && (10 <= m && j <= 4) && 10 <= n) && i <= 7)) || ((((16 <= k && 10 <= m) && i <= 1) && 10 <= n) && j <= 6)) || (((50 <= k && 10 <= m && j <= 0) && i <= 5) && 10 <= n)) || (((i + 1 <= n && 10 <= m && j <= 0) && 10 <= n) && 90 <= k)) || ((((10 <= m && i <= 2) && j <= 7) && 10 <= n) && 27 <= k)) || (((89 <= k && i <= 8) && 10 <= m && j <= 9) && 10 <= n)) || (((53 <= k && i <= 5) && 10 <= m && j <= 3) && 10 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 139.5s OverallTime, 20 OverallIterations, 100 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 130.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 657 SDtfs, 1051 SDslu, 2539 SDs, 0 SdLazy, 1123 SolverSat, 178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3146 GetRequests, 2671 SyntacticMatches, 62 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3630 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 206 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 27 PreInvPairs, 5144 NumberOfFragments, 1995 HoareAnnotationTreeSize, 27 FomulaSimplifications, 5534241 FormulaSimplificationTreeSizeReduction, 71.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 158662 FormulaSimplificationTreeSizeReductionInter, 58.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 3145 NumberOfCodeBlocks, 3081 NumberOfCodeBlocksAsserted, 211 NumberOfCheckSat, 4529 ConstructedInterpolants, 0 QuantifiedInterpolants, 3075357 SizeOfPredicates, 49 NumberOfNonLiveVariables, 3447 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 54 InterpolantComputations, 3 PerfectInterpolantSequences, 26929/108396 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...