./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c --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_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 cd6d4490a7412402195d3193de0347508566f7c8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:07:10,861 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 05:07:10,862 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 05:07:10,868 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 05:07:10,868 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 05:07:10,868 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 05:07:10,869 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 05:07:10,870 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 05:07:10,871 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 05:07:10,871 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 05:07:10,872 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 05:07:10,872 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 05:07:10,872 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 05:07:10,873 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 05:07:10,873 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 05:07:10,874 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 05:07:10,874 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 05:07:10,875 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 05:07:10,876 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 05:07:10,877 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 05:07:10,878 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 05:07:10,878 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 05:07:10,879 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 05:07:10,879 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 05:07:10,880 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 05:07:10,880 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 05:07:10,881 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 05:07:10,881 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 05:07:10,881 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 05:07:10,882 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 05:07:10,882 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 05:07:10,883 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 05:07:10,883 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 05:07:10,883 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 05:07:10,883 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 05:07:10,884 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 05:07:10,884 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 05:07:10,891 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 05:07:10,891 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 05:07:10,892 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 05:07:10,892 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 05:07:10,892 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 05:07:10,892 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 05:07:10,892 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 05:07:10,892 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 05:07:10,893 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 05:07:10,893 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 05:07:10,893 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 05:07:10,893 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 05:07:10,893 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 05:07:10,893 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 05:07:10,894 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 05:07:10,895 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 05:07:10,895 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 05:07:10,895 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 05:07:10,896 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 05:07:10,896 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 05:07:10,896 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 05:07:10,896 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 05:07:10,896 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_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 -> cd6d4490a7412402195d3193de0347508566f7c8 [2018-12-02 05:07:10,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 05:07:10,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 05:07:10,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 05:07:10,923 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 05:07:10,923 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 05:07:10,924 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-12-02 05:07:10,958 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/data/931624756/ea395d057e1245febf59b4a64549d914/FLAG9faab0ee1 [2018-12-02 05:07:11,403 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 05:07:11,404 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-12-02 05:07:11,408 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/data/931624756/ea395d057e1245febf59b4a64549d914/FLAG9faab0ee1 [2018-12-02 05:07:11,416 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/data/931624756/ea395d057e1245febf59b4a64549d914 [2018-12-02 05:07:11,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 05:07:11,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 05:07:11,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 05:07:11,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 05:07:11,422 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 05:07:11,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59facd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11, skipping insertion in model container [2018-12-02 05:07:11,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 05:07:11,439 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 05:07:11,529 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 05:07:11,531 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 05:07:11,540 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 05:07:11,548 INFO L195 MainTranslator]: Completed translation [2018-12-02 05:07:11,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11 WrapperNode [2018-12-02 05:07:11,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 05:07:11,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 05:07:11,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 05:07:11,549 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 05:07:11,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 05:07:11,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 05:07:11,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 05:07:11,561 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 05:07:11,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... [2018-12-02 05:07:11,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 05:07:11,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 05:07:11,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 05:07:11,576 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 05:07:11,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:11,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 05:07:11,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 05:07:11,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 05:07:11,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 05:07:11,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 05:07:11,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 05:07:11,648 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-02 05:07:11,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-02 05:07:11,648 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-02 05:07:11,649 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-02 05:07:11,747 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 05:07:11,747 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 05:07:11,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:11 BoogieIcfgContainer [2018-12-02 05:07:11,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 05:07:11,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 05:07:11,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 05:07:11,750 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 05:07:11,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:07:11" (1/3) ... [2018-12-02 05:07:11,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c19f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:11, skipping insertion in model container [2018-12-02 05:07:11,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:07:11" (2/3) ... [2018-12-02 05:07:11,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c19f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:07:11, skipping insertion in model container [2018-12-02 05:07:11,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:11" (3/3) ... [2018-12-02 05:07:11,752 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8_true-unreach-call_true-termination.c [2018-12-02 05:07:11,758 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 05:07:11,762 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 05:07:11,771 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 05:07:11,790 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 05:07:11,790 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 05:07:11,790 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 05:07:11,791 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 05:07:11,791 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 05:07:11,791 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 05:07:11,791 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 05:07:11,791 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 05:07:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-02 05:07:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-02 05:07:11,805 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:11,805 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:11,806 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:11,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-02 05:07:11,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:11,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:11,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:11,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:11,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:11,908 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 05:07:11,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:07:11,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 05:07:11,910 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:07:11,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 05:07:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 05:07:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 05:07:11,921 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-02 05:07:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:11,973 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-02 05:07:11,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 05:07:11,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-02 05:07:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:11,980 INFO L225 Difference]: With dead ends: 44 [2018-12-02 05:07:11,980 INFO L226 Difference]: Without dead ends: 30 [2018-12-02 05:07:11,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 05:07:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-02 05:07:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-02 05:07:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 05:07:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-02 05:07:12,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-02 05:07:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:12,007 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-02 05:07:12,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 05:07:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-02 05:07:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 05:07:12,008 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:12,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:12,008 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:12,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-02 05:07:12,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:12,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:12,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,009 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:12,035 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 05:07:12,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 05:07:12,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 05:07:12,035 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:07:12,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 05:07:12,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 05:07:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 05:07:12,037 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-02 05:07:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:12,065 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-02 05:07:12,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 05:07:12,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-02 05:07:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:12,066 INFO L225 Difference]: With dead ends: 36 [2018-12-02 05:07:12,066 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 05:07:12,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 05:07:12,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 05:07:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-02 05:07:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 05:07:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-02 05:07:12,070 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-02 05:07:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:12,071 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-02 05:07:12,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 05:07:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-02 05:07:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 05:07:12,071 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:12,071 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:12,072 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:12,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-02 05:07:12,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:12,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:12,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,073 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 05:07:12,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:12,112 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:12,112 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-02 05:07:12,113 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-12-02 05:07:12,134 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 05:07:12,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 05:07:12,196 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 05:07:12,197 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-12-02 05:07:12,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:12,202 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 05:07:12,228 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-12-02 05:07:12,228 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 05:07:12,247 INFO L418 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-12-02 05:07:12,247 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 05:07:12,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 05:07:12,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-12-02 05:07:12,248 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:07:12,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 05:07:12,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 05:07:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 05:07:12,248 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-12-02 05:07:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:12,369 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-12-02 05:07:12,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 05:07:12,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-12-02 05:07:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:12,370 INFO L225 Difference]: With dead ends: 72 [2018-12-02 05:07:12,370 INFO L226 Difference]: Without dead ends: 48 [2018-12-02 05:07:12,370 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-02 05:07:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-02 05:07:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-12-02 05:07:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-02 05:07:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-12-02 05:07:12,376 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-12-02 05:07:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:12,376 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-12-02 05:07:12,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 05:07:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-12-02 05:07:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-02 05:07:12,378 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:12,378 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:12,378 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:12,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-02 05:07:12,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:12,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:12,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,379 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-02 05:07:12,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:12,420 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:12,420 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-02 05:07:12,421 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-02 05:07:12,422 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 05:07:12,422 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 05:07:12,519 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 05:07:12,519 INFO L272 AbstractInterpreter]: Visited 28 different actions 313 times. Never merged. Widened at 2 different actions 18 times. Performed 647 root evaluator evaluations with a maximum evaluation depth of 4. Performed 647 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 29 fixpoints after 6 different actions. Largest state had 5 variables. [2018-12-02 05:07:12,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:12,522 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 05:07:12,533 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-12-02 05:07:12,533 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 05:07:12,563 INFO L418 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-12-02 05:07:12,563 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 05:07:12,563 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 05:07:12,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-12-02 05:07:12,563 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:07:12,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 05:07:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 05:07:12,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-02 05:07:12,564 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-12-02 05:07:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:12,708 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-12-02 05:07:12,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 05:07:12,708 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-02 05:07:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:12,709 INFO L225 Difference]: With dead ends: 87 [2018-12-02 05:07:12,709 INFO L226 Difference]: Without dead ends: 55 [2018-12-02 05:07:12,710 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-02 05:07:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-02 05:07:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-02 05:07:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-02 05:07:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-12-02 05:07:12,715 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-12-02 05:07:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:12,715 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-12-02 05:07:12,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 05:07:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-12-02 05:07:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-02 05:07:12,716 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:12,716 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:12,717 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:12,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-12-02 05:07:12,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:12,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:12,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:12,718 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-02 05:07:12,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:12,761 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:12,761 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:12,762 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:12,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:12,762 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:12,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:07:12,768 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 05:07:12,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 05:07:12,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:12,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-02 05:07:12,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-02 05:07:13,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:13,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2018-12-02 05:07:13,082 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:13,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 05:07:13,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 05:07:13,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-12-02 05:07:13,083 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-12-02 05:07:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:13,243 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-12-02 05:07:13,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 05:07:13,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-12-02 05:07:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:13,245 INFO L225 Difference]: With dead ends: 121 [2018-12-02 05:07:13,245 INFO L226 Difference]: Without dead ends: 76 [2018-12-02 05:07:13,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-12-02 05:07:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-02 05:07:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-12-02 05:07:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-02 05:07:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-02 05:07:13,252 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-12-02 05:07:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:13,253 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-02 05:07:13,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 05:07:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-02 05:07:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-02 05:07:13,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:13,254 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:13,254 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:13,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:13,255 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-12-02 05:07:13,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:13,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:13,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:13,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:13,256 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-02 05:07:13,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:13,305 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:13,305 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-12-02 05:07:13,306 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-02 05:07:13,307 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 05:07:13,307 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 05:07:14,049 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 05:07:14,049 INFO L272 AbstractInterpreter]: Visited 29 different actions 4700 times. Merged at 11 different actions 1218 times. Widened at 2 different actions 234 times. Performed 10886 root evaluator evaluations with a maximum evaluation depth of 4. Performed 10886 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 580 fixpoints after 9 different actions. Largest state had 5 variables. [2018-12-02 05:07:14,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:14,051 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 05:07:14,059 INFO L227 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 50% of their original sizes. [2018-12-02 05:07:14,060 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 05:07:14,090 INFO L418 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-12-02 05:07:14,090 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 05:07:14,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 05:07:14,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-12-02 05:07:14,091 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:07:14,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 05:07:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 05:07:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-12-02 05:07:14,091 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 11 states. [2018-12-02 05:07:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:14,296 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2018-12-02 05:07:14,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 05:07:14,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2018-12-02 05:07:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:14,298 INFO L225 Difference]: With dead ends: 109 [2018-12-02 05:07:14,298 INFO L226 Difference]: Without dead ends: 68 [2018-12-02 05:07:14,298 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-12-02 05:07:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-02 05:07:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-02 05:07:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-02 05:07:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2018-12-02 05:07:14,305 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 55 [2018-12-02 05:07:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:14,306 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2018-12-02 05:07:14,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 05:07:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2018-12-02 05:07:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-02 05:07:14,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:14,308 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:14,308 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:14,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1768644787, now seen corresponding path program 1 times [2018-12-02 05:07:14,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:14,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:14,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:14,309 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-12-02 05:07:14,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:14,374 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:14,374 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2018-12-02 05:07:14,374 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-02 05:07:14,375 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 05:07:14,375 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 05:07:20,083 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 05:07:20,083 INFO L272 AbstractInterpreter]: Visited 34 different actions 66811 times. Merged at 16 different actions 20941 times. Widened at 4 different actions 2001 times. Performed 164403 root evaluator evaluations with a maximum evaluation depth of 4. Performed 164403 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 9083 fixpoints after 10 different actions. Largest state had 5 variables. [2018-12-02 05:07:20,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:20,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 05:07:20,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:20,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:20,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:20,091 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 05:07:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:20,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-12-02 05:07:20,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-02 05:07:20,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:20,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 18 [2018-12-02 05:07:20,629 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:20,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 05:07:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 05:07:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2018-12-02 05:07:20,630 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 12 states. [2018-12-02 05:07:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:20,781 INFO L93 Difference]: Finished difference Result 144 states and 218 transitions. [2018-12-02 05:07:20,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 05:07:20,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2018-12-02 05:07:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:20,782 INFO L225 Difference]: With dead ends: 144 [2018-12-02 05:07:20,783 INFO L226 Difference]: Without dead ends: 95 [2018-12-02 05:07:20,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2018-12-02 05:07:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-02 05:07:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2018-12-02 05:07:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-02 05:07:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2018-12-02 05:07:20,794 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 67 [2018-12-02 05:07:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:20,794 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2018-12-02 05:07:20,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 05:07:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2018-12-02 05:07:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-02 05:07:20,796 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:20,796 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:20,796 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:20,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 650896746, now seen corresponding path program 1 times [2018-12-02 05:07:20,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:20,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:20,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:20,798 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 39 proven. 39 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-12-02 05:07:20,895 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:20,895 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:20,895 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2018-12-02 05:07:20,895 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-02 05:07:20,896 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 05:07:20,896 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 05:07:21,184 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 05:07:21,185 INFO L272 AbstractInterpreter]: Visited 29 different actions 3227 times. Merged at 11 different actions 856 times. Widened at 2 different actions 130 times. Performed 7980 root evaluator evaluations with a maximum evaluation depth of 4. Performed 7980 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 384 fixpoints after 9 different actions. Largest state had 5 variables. [2018-12-02 05:07:21,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:21,186 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 05:07:21,197 INFO L227 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 55.26% of their original sizes. [2018-12-02 05:07:21,197 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 05:07:21,256 INFO L418 sIntCurrentIteration]: We unified 80 AI predicates to 80 [2018-12-02 05:07:21,256 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 05:07:21,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 05:07:21,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [11] total 24 [2018-12-02 05:07:21,256 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 05:07:21,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 05:07:21,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 05:07:21,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-12-02 05:07:21,257 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 15 states. [2018-12-02 05:07:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:21,557 INFO L93 Difference]: Finished difference Result 136 states and 177 transitions. [2018-12-02 05:07:21,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-02 05:07:21,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2018-12-02 05:07:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:21,558 INFO L225 Difference]: With dead ends: 136 [2018-12-02 05:07:21,558 INFO L226 Difference]: Without dead ends: 88 [2018-12-02 05:07:21,559 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2018-12-02 05:07:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-02 05:07:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-02 05:07:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-02 05:07:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2018-12-02 05:07:21,567 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 81 [2018-12-02 05:07:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:21,567 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2018-12-02 05:07:21,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 05:07:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2018-12-02 05:07:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-02 05:07:21,569 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:21,569 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:21,569 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:21,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:21,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1708632044, now seen corresponding path program 2 times [2018-12-02 05:07:21,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:21,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:21,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:21,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:21,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 68 proven. 48 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-12-02 05:07:21,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:21,660 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:21,660 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:21,660 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:21,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:21,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:21,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:07:21,666 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 05:07:21,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 05:07:21,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:21,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 67 proven. 15 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-12-02 05:07:21,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 67 proven. 16 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-12-02 05:07:21,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:21,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2018-12-02 05:07:21,950 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:21,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-02 05:07:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-02 05:07:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2018-12-02 05:07:21,951 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 16 states. [2018-12-02 05:07:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:22,230 INFO L93 Difference]: Finished difference Result 218 states and 340 transitions. [2018-12-02 05:07:22,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-02 05:07:22,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2018-12-02 05:07:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:22,231 INFO L225 Difference]: With dead ends: 218 [2018-12-02 05:07:22,231 INFO L226 Difference]: Without dead ends: 147 [2018-12-02 05:07:22,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 202 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2018-12-02 05:07:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-12-02 05:07:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2018-12-02 05:07:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-12-02 05:07:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 166 transitions. [2018-12-02 05:07:22,245 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 166 transitions. Word has length 108 [2018-12-02 05:07:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:22,245 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 166 transitions. [2018-12-02 05:07:22,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-02 05:07:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 166 transitions. [2018-12-02 05:07:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-12-02 05:07:22,248 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:22,248 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:22,248 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:22,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1764149606, now seen corresponding path program 3 times [2018-12-02 05:07:22,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:22,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:22,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:22,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:22,249 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 21 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-12-02 05:07:22,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:22,347 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:22,347 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:22,347 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:22,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:22,347 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:22,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 05:07:22,353 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 05:07:22,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 05:07:22,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:22,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 55 proven. 281 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2018-12-02 05:07:22,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 55 proven. 297 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-12-02 05:07:23,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:23,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 15] total 24 [2018-12-02 05:07:23,148 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:23,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 05:07:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 05:07:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2018-12-02 05:07:23,149 INFO L87 Difference]: Start difference. First operand 117 states and 166 transitions. Second operand 17 states. [2018-12-02 05:07:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:23,490 INFO L93 Difference]: Finished difference Result 319 states and 576 transitions. [2018-12-02 05:07:23,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 05:07:23,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 188 [2018-12-02 05:07:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:23,492 INFO L225 Difference]: With dead ends: 319 [2018-12-02 05:07:23,492 INFO L226 Difference]: Without dead ends: 194 [2018-12-02 05:07:23,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 350 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2018-12-02 05:07:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-12-02 05:07:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 135. [2018-12-02 05:07:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-12-02 05:07:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 198 transitions. [2018-12-02 05:07:23,505 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 198 transitions. Word has length 188 [2018-12-02 05:07:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:23,505 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 198 transitions. [2018-12-02 05:07:23,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 05:07:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 198 transitions. [2018-12-02 05:07:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-12-02 05:07:23,507 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:23,507 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 17, 17, 16, 14, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:23,507 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:23,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash -321275333, now seen corresponding path program 4 times [2018-12-02 05:07:23,508 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:23,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:23,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:23,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:23,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 205 proven. 196 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-12-02 05:07:23,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:23,564 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:23,564 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:23,564 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:23,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:23,564 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:23,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:23,570 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 05:07:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:23,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 99 proven. 469 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2018-12-02 05:07:23,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 99 proven. 493 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2018-12-02 05:07:24,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:24,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 17] total 23 [2018-12-02 05:07:24,802 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:24,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-02 05:07:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-02 05:07:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2018-12-02 05:07:24,803 INFO L87 Difference]: Start difference. First operand 135 states and 198 transitions. Second operand 16 states. [2018-12-02 05:07:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:25,066 INFO L93 Difference]: Finished difference Result 356 states and 720 transitions. [2018-12-02 05:07:25,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 05:07:25,067 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 259 [2018-12-02 05:07:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:25,068 INFO L225 Difference]: With dead ends: 356 [2018-12-02 05:07:25,068 INFO L226 Difference]: Without dead ends: 210 [2018-12-02 05:07:25,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 488 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2018-12-02 05:07:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-12-02 05:07:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 149. [2018-12-02 05:07:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-02 05:07:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 223 transitions. [2018-12-02 05:07:25,080 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 223 transitions. Word has length 259 [2018-12-02 05:07:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:25,080 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 223 transitions. [2018-12-02 05:07:25,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-02 05:07:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 223 transitions. [2018-12-02 05:07:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-12-02 05:07:25,083 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:25,083 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 20, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 8, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:25,083 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:25,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1869550042, now seen corresponding path program 5 times [2018-12-02 05:07:25,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:25,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:25,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:25,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:25,084 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 286 proven. 418 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2018-12-02 05:07:25,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:25,208 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:25,208 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:25,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:25,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:25,208 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:25,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:07:25,214 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 05:07:25,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 05:07:25,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:25,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 524 proven. 87 refuted. 0 times theorem prover too weak. 2845 trivial. 0 not checked. [2018-12-02 05:07:25,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 528 proven. 93 refuted. 0 times theorem prover too weak. 2835 trivial. 0 not checked. [2018-12-02 05:07:26,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:26,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2018-12-02 05:07:26,068 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:26,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 05:07:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 05:07:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2018-12-02 05:07:26,069 INFO L87 Difference]: Start difference. First operand 149 states and 223 transitions. Second operand 18 states. [2018-12-02 05:07:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:26,497 INFO L93 Difference]: Finished difference Result 333 states and 567 transitions. [2018-12-02 05:07:26,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-02 05:07:26,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 353 [2018-12-02 05:07:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:26,498 INFO L225 Difference]: With dead ends: 333 [2018-12-02 05:07:26,498 INFO L226 Difference]: Without dead ends: 209 [2018-12-02 05:07:26,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 684 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2018-12-02 05:07:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-12-02 05:07:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 181. [2018-12-02 05:07:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-12-02 05:07:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 266 transitions. [2018-12-02 05:07:26,511 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 266 transitions. Word has length 353 [2018-12-02 05:07:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:26,511 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 266 transitions. [2018-12-02 05:07:26,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 05:07:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 266 transitions. [2018-12-02 05:07:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-12-02 05:07:26,513 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:26,513 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 19, 18, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 9, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:26,513 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:26,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash 995876244, now seen corresponding path program 6 times [2018-12-02 05:07:26,513 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:26,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:26,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:26,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:26,514 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 172 proven. 466 refuted. 0 times theorem prover too weak. 2770 trivial. 0 not checked. [2018-12-02 05:07:26,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:26,634 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:26,635 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:26,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:26,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:26,635 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:26,641 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 05:07:26,641 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 05:07:26,681 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 05:07:26,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:26,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 153 proven. 669 refuted. 0 times theorem prover too weak. 2586 trivial. 0 not checked. [2018-12-02 05:07:26,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3408 backedges. 153 proven. 690 refuted. 0 times theorem prover too weak. 2565 trivial. 0 not checked. [2018-12-02 05:07:27,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:27,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 17] total 24 [2018-12-02 05:07:27,830 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:27,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 05:07:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 05:07:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2018-12-02 05:07:27,831 INFO L87 Difference]: Start difference. First operand 181 states and 266 transitions. Second operand 17 states. [2018-12-02 05:07:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:28,113 INFO L93 Difference]: Finished difference Result 396 states and 709 transitions. [2018-12-02 05:07:28,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-02 05:07:28,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 350 [2018-12-02 05:07:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:28,116 INFO L225 Difference]: With dead ends: 396 [2018-12-02 05:07:28,116 INFO L226 Difference]: Without dead ends: 241 [2018-12-02 05:07:28,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 671 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2018-12-02 05:07:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-12-02 05:07:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 172. [2018-12-02 05:07:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-12-02 05:07:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 242 transitions. [2018-12-02 05:07:28,134 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 242 transitions. Word has length 350 [2018-12-02 05:07:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:28,134 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 242 transitions. [2018-12-02 05:07:28,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 05:07:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 242 transitions. [2018-12-02 05:07:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-12-02 05:07:28,138 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:28,138 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 44, 44, 39, 35, 24, 24, 24, 24, 24, 24, 24, 22, 22, 22, 22, 22, 22, 22, 17, 11, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:28,138 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:28,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:28,139 INFO L82 PathProgramCache]: Analyzing trace with hash -116693433, now seen corresponding path program 7 times [2018-12-02 05:07:28,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:28,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:28,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:28,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:28,140 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11852 backedges. 644 proven. 1207 refuted. 0 times theorem prover too weak. 10001 trivial. 0 not checked. [2018-12-02 05:07:28,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:28,408 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:28,408 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:28,408 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:28,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:28,408 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:28,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:28,414 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 05:07:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:28,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11852 backedges. 527 proven. 1209 refuted. 0 times theorem prover too weak. 10116 trivial. 0 not checked. [2018-12-02 05:07:28,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11852 backedges. 526 proven. 1231 refuted. 0 times theorem prover too weak. 10095 trivial. 0 not checked. [2018-12-02 05:07:30,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:30,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 18] total 32 [2018-12-02 05:07:30,313 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-02 05:07:30,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-02 05:07:30,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2018-12-02 05:07:30,314 INFO L87 Difference]: Start difference. First operand 172 states and 242 transitions. Second operand 24 states. [2018-12-02 05:07:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:30,964 INFO L93 Difference]: Finished difference Result 468 states and 861 transitions. [2018-12-02 05:07:30,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-02 05:07:30,964 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 639 [2018-12-02 05:07:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:30,966 INFO L225 Difference]: With dead ends: 468 [2018-12-02 05:07:30,966 INFO L226 Difference]: Without dead ends: 229 [2018-12-02 05:07:30,967 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1312 GetRequests, 1247 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=427, Invalid=2225, Unknown=0, NotChecked=0, Total=2652 [2018-12-02 05:07:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-12-02 05:07:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2018-12-02 05:07:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-12-02 05:07:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 300 transitions. [2018-12-02 05:07:30,978 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 300 transitions. Word has length 639 [2018-12-02 05:07:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:30,979 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 300 transitions. [2018-12-02 05:07:30,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-02 05:07:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 300 transitions. [2018-12-02 05:07:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-12-02 05:07:30,981 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:30,981 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 44, 44, 37, 35, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 14, 13, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:30,981 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:30,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1646623792, now seen corresponding path program 8 times [2018-12-02 05:07:30,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:30,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:30,982 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11305 backedges. 575 proven. 766 refuted. 0 times theorem prover too weak. 9964 trivial. 0 not checked. [2018-12-02 05:07:31,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:31,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:31,204 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:31,204 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:31,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:31,204 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:31,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:07:31,210 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 05:07:31,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-12-02 05:07:31,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:31,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11305 backedges. 4052 proven. 17 refuted. 0 times theorem prover too weak. 7236 trivial. 0 not checked. [2018-12-02 05:07:31,407 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11305 backedges. 1247 proven. 187 refuted. 0 times theorem prover too weak. 9871 trivial. 0 not checked. [2018-12-02 05:07:32,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:32,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2018-12-02 05:07:32,384 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:32,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 05:07:32,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 05:07:32,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2018-12-02 05:07:32,385 INFO L87 Difference]: Start difference. First operand 214 states and 300 transitions. Second operand 15 states. [2018-12-02 05:07:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:32,613 INFO L93 Difference]: Finished difference Result 391 states and 571 transitions. [2018-12-02 05:07:32,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-02 05:07:32,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 625 [2018-12-02 05:07:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:32,614 INFO L225 Difference]: With dead ends: 391 [2018-12-02 05:07:32,615 INFO L226 Difference]: Without dead ends: 196 [2018-12-02 05:07:32,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 1234 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2018-12-02 05:07:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-12-02 05:07:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-12-02 05:07:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-12-02 05:07:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 269 transitions. [2018-12-02 05:07:32,625 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 269 transitions. Word has length 625 [2018-12-02 05:07:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:32,625 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 269 transitions. [2018-12-02 05:07:32,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 05:07:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 269 transitions. [2018-12-02 05:07:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2018-12-02 05:07:32,627 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:32,627 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 28, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 16, 12, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:32,627 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:32,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash 614083911, now seen corresponding path program 9 times [2018-12-02 05:07:32,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:32,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:32,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:32,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:32,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8174 backedges. 353 proven. 653 refuted. 0 times theorem prover too weak. 7168 trivial. 0 not checked. [2018-12-02 05:07:32,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:32,789 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:32,790 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:32,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:32,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:32,790 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:32,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 05:07:32,796 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 05:07:32,865 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 05:07:32,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:32,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8174 backedges. 298 proven. 867 refuted. 0 times theorem prover too weak. 7009 trivial. 0 not checked. [2018-12-02 05:07:33,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8174 backedges. 300 proven. 881 refuted. 0 times theorem prover too weak. 6993 trivial. 0 not checked. [2018-12-02 05:07:34,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:34,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 22 [2018-12-02 05:07:34,109 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:34,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-02 05:07:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-02 05:07:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-12-02 05:07:34,110 INFO L87 Difference]: Start difference. First operand 196 states and 269 transitions. Second operand 16 states. [2018-12-02 05:07:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:34,396 INFO L93 Difference]: Finished difference Result 498 states and 765 transitions. [2018-12-02 05:07:34,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 05:07:34,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 529 [2018-12-02 05:07:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:34,398 INFO L225 Difference]: With dead ends: 498 [2018-12-02 05:07:34,398 INFO L226 Difference]: Without dead ends: 255 [2018-12-02 05:07:34,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1035 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2018-12-02 05:07:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-12-02 05:07:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 218. [2018-12-02 05:07:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-12-02 05:07:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 302 transitions. [2018-12-02 05:07:34,411 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 302 transitions. Word has length 529 [2018-12-02 05:07:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:34,411 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 302 transitions. [2018-12-02 05:07:34,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-02 05:07:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 302 transitions. [2018-12-02 05:07:34,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-12-02 05:07:34,413 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:34,413 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 23, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 10, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:34,413 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:34,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:34,414 INFO L82 PathProgramCache]: Analyzing trace with hash 789981588, now seen corresponding path program 10 times [2018-12-02 05:07:34,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:34,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:34,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:34,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:34,415 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 485 proven. 189 refuted. 0 times theorem prover too weak. 3389 trivial. 0 not checked. [2018-12-02 05:07:34,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:34,503 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:34,503 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:34,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:34,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:34,504 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:34,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:34,511 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 05:07:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:34,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 391 proven. 404 refuted. 0 times theorem prover too weak. 3268 trivial. 0 not checked. [2018-12-02 05:07:34,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 393 proven. 418 refuted. 0 times theorem prover too weak. 3252 trivial. 0 not checked. [2018-12-02 05:07:35,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:35,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 19 [2018-12-02 05:07:35,411 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 05:07:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 05:07:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-12-02 05:07:35,412 INFO L87 Difference]: Start difference. First operand 218 states and 302 transitions. Second operand 13 states. [2018-12-02 05:07:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:35,560 INFO L93 Difference]: Finished difference Result 283 states and 412 transitions. [2018-12-02 05:07:35,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 05:07:35,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 381 [2018-12-02 05:07:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:35,562 INFO L225 Difference]: With dead ends: 283 [2018-12-02 05:07:35,562 INFO L226 Difference]: Without dead ends: 271 [2018-12-02 05:07:35,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 744 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-12-02 05:07:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-12-02 05:07:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 226. [2018-12-02 05:07:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-12-02 05:07:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 319 transitions. [2018-12-02 05:07:35,575 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 319 transitions. Word has length 381 [2018-12-02 05:07:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:35,575 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 319 transitions. [2018-12-02 05:07:35,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 05:07:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 319 transitions. [2018-12-02 05:07:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-12-02 05:07:35,577 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:35,578 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 31, 29, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:35,578 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:35,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash 793723254, now seen corresponding path program 11 times [2018-12-02 05:07:35,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:35,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:35,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:35,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:35,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7643 backedges. 736 proven. 706 refuted. 0 times theorem prover too weak. 6201 trivial. 0 not checked. [2018-12-02 05:07:35,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:35,800 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:35,801 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:35,801 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:35,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:35,801 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:35,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:07:35,809 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 05:07:35,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-12-02 05:07:35,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:35,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7643 backedges. 2708 proven. 95 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2018-12-02 05:07:36,005 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7643 backedges. 1136 proven. 249 refuted. 0 times theorem prover too weak. 6258 trivial. 0 not checked. [2018-12-02 05:07:36,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:36,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 15] total 25 [2018-12-02 05:07:36,968 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:36,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-02 05:07:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-02 05:07:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2018-12-02 05:07:36,969 INFO L87 Difference]: Start difference. First operand 226 states and 319 transitions. Second operand 19 states. [2018-12-02 05:07:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:37,393 INFO L93 Difference]: Finished difference Result 464 states and 711 transitions. [2018-12-02 05:07:37,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-02 05:07:37,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 517 [2018-12-02 05:07:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:37,395 INFO L225 Difference]: With dead ends: 464 [2018-12-02 05:07:37,395 INFO L226 Difference]: Without dead ends: 251 [2018-12-02 05:07:37,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1014 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2018-12-02 05:07:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-12-02 05:07:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 235. [2018-12-02 05:07:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-12-02 05:07:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2018-12-02 05:07:37,417 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 517 [2018-12-02 05:07:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:37,417 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2018-12-02 05:07:37,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-02 05:07:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2018-12-02 05:07:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2018-12-02 05:07:37,422 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:37,422 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 43, 40, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 17, 15, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:37,422 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:37,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:37,422 INFO L82 PathProgramCache]: Analyzing trace with hash 342960050, now seen corresponding path program 12 times [2018-12-02 05:07:37,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:37,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:37,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:37,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:37,423 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14587 backedges. 1370 proven. 572 refuted. 0 times theorem prover too weak. 12645 trivial. 0 not checked. [2018-12-02 05:07:37,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:37,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:37,658 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:37,658 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:37,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:37,659 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:37,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 05:07:37,665 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 05:07:37,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 05:07:37,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:37,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14587 backedges. 402 proven. 1537 refuted. 0 times theorem prover too weak. 12648 trivial. 0 not checked. [2018-12-02 05:07:37,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14587 backedges. 401 proven. 1559 refuted. 0 times theorem prover too weak. 12627 trivial. 0 not checked. [2018-12-02 05:07:39,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:39,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 18] total 27 [2018-12-02 05:07:39,656 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:39,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-02 05:07:39,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-02 05:07:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2018-12-02 05:07:39,657 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand 19 states. [2018-12-02 05:07:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:39,861 INFO L93 Difference]: Finished difference Result 371 states and 593 transitions. [2018-12-02 05:07:39,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 05:07:39,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 708 [2018-12-02 05:07:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:39,863 INFO L225 Difference]: With dead ends: 371 [2018-12-02 05:07:39,863 INFO L226 Difference]: Without dead ends: 175 [2018-12-02 05:07:39,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1443 GetRequests, 1393 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2018-12-02 05:07:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-12-02 05:07:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-12-02 05:07:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-12-02 05:07:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 204 transitions. [2018-12-02 05:07:39,872 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 204 transitions. Word has length 708 [2018-12-02 05:07:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:39,872 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 204 transitions. [2018-12-02 05:07:39,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-02 05:07:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 204 transitions. [2018-12-02 05:07:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-12-02 05:07:39,874 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:39,874 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:39,874 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:39,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:39,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1638954211, now seen corresponding path program 13 times [2018-12-02 05:07:39,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:39,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:39,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:39,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:39,875 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1313 proven. 334 refuted. 0 times theorem prover too weak. 5614 trivial. 0 not checked. [2018-12-02 05:07:40,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:40,082 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:40,082 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:40,082 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:40,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:40,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:40,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:40,088 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 05:07:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:40,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 948 proven. 208 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2018-12-02 05:07:40,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 946 proven. 224 refuted. 0 times theorem prover too weak. 6091 trivial. 0 not checked. [2018-12-02 05:07:41,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:41,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 16] total 29 [2018-12-02 05:07:41,293 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:41,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-02 05:07:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-02 05:07:41,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2018-12-02 05:07:41,293 INFO L87 Difference]: Start difference. First operand 175 states and 204 transitions. Second operand 22 states. [2018-12-02 05:07:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:41,698 INFO L93 Difference]: Finished difference Result 247 states and 287 transitions. [2018-12-02 05:07:41,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-02 05:07:41,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 504 [2018-12-02 05:07:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:41,699 INFO L225 Difference]: With dead ends: 247 [2018-12-02 05:07:41,699 INFO L226 Difference]: Without dead ends: 193 [2018-12-02 05:07:41,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 987 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2018-12-02 05:07:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-02 05:07:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2018-12-02 05:07:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-12-02 05:07:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 224 transitions. [2018-12-02 05:07:41,707 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 224 transitions. Word has length 504 [2018-12-02 05:07:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:41,707 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 224 transitions. [2018-12-02 05:07:41,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-02 05:07:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 224 transitions. [2018-12-02 05:07:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2018-12-02 05:07:41,709 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:41,710 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 28, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:41,710 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:41,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash -227402005, now seen corresponding path program 14 times [2018-12-02 05:07:41,710 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:41,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:41,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:41,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:41,711 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 908 proven. 35 refuted. 0 times theorem prover too weak. 5537 trivial. 0 not checked. [2018-12-02 05:07:41,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:41,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:41,893 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:41,893 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:41,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:41,893 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:41,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 05:07:41,899 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 05:07:41,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-02 05:07:41,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:41,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 848 proven. 31 refuted. 0 times theorem prover too weak. 5601 trivial. 0 not checked. [2018-12-02 05:07:42,062 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 848 proven. 31 refuted. 0 times theorem prover too weak. 5601 trivial. 0 not checked. [2018-12-02 05:07:42,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:42,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 19 [2018-12-02 05:07:42,740 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:42,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 05:07:42,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 05:07:42,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-12-02 05:07:42,741 INFO L87 Difference]: Start difference. First operand 190 states and 224 transitions. Second operand 15 states. [2018-12-02 05:07:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:42,961 INFO L93 Difference]: Finished difference Result 361 states and 428 transitions. [2018-12-02 05:07:42,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 05:07:42,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 477 [2018-12-02 05:07:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:42,963 INFO L225 Difference]: With dead ends: 361 [2018-12-02 05:07:42,963 INFO L226 Difference]: Without dead ends: 196 [2018-12-02 05:07:42,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 940 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2018-12-02 05:07:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-12-02 05:07:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2018-12-02 05:07:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-12-02 05:07:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 220 transitions. [2018-12-02 05:07:42,975 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 220 transitions. Word has length 477 [2018-12-02 05:07:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:42,975 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 220 transitions. [2018-12-02 05:07:42,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 05:07:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 220 transitions. [2018-12-02 05:07:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-02 05:07:42,978 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:42,978 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:42,978 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:42,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 15 times [2018-12-02 05:07:42,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:42,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:42,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:42,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:42,979 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-12-02 05:07:43,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:43,687 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:43,687 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:43,687 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:43,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:43,687 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:43,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 05:07:43,695 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 05:07:43,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 05:07:43,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 05:07:43,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-12-02 05:07:44,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-12-02 05:07:46,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:46,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 52 [2018-12-02 05:07:46,858 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:46,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-02 05:07:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-02 05:07:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-12-02 05:07:46,859 INFO L87 Difference]: Start difference. First operand 190 states and 220 transitions. Second operand 52 states. [2018-12-02 05:07:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:47,321 INFO L93 Difference]: Finished difference Result 217 states and 250 transitions. [2018-12-02 05:07:47,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-02 05:07:47,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2018-12-02 05:07:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:47,322 INFO L225 Difference]: With dead ends: 217 [2018-12-02 05:07:47,322 INFO L226 Difference]: Without dead ends: 188 [2018-12-02 05:07:47,323 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 942 SyntacticMatches, 70 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-12-02 05:07:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-12-02 05:07:47,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-12-02 05:07:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-12-02 05:07:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2018-12-02 05:07:47,329 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 463 [2018-12-02 05:07:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:47,329 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2018-12-02 05:07:47,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-02 05:07:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2018-12-02 05:07:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-12-02 05:07:47,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 05:07:47,331 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 05:07:47,331 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 05:07:47,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 05:07:47,332 INFO L82 PathProgramCache]: Analyzing trace with hash -6928239, now seen corresponding path program 16 times [2018-12-02 05:07:47,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 05:07:47,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:47,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 05:07:47,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 05:07:47,332 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 05:07:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 288 proven. 1213 refuted. 0 times theorem prover too weak. 5760 trivial. 0 not checked. [2018-12-02 05:07:47,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:47,498 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 05:07:47,498 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 05:07:47,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 05:07:47,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 05:07:47,499 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/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 05:07:47,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 05:07:47,506 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 05:07:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 05:07:47,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 05:07:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 294 proven. 1204 refuted. 0 times theorem prover too weak. 5763 trivial. 0 not checked. [2018-12-02 05:07:47,666 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 05:07:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 291 proven. 1237 refuted. 0 times theorem prover too weak. 5733 trivial. 0 not checked. [2018-12-02 05:07:49,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 05:07:49,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 20] total 26 [2018-12-02 05:07:49,309 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 05:07:49,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 05:07:49,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 05:07:49,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2018-12-02 05:07:49,310 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand 17 states. [2018-12-02 05:07:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 05:07:49,451 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2018-12-02 05:07:49,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 05:07:49,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 504 [2018-12-02 05:07:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 05:07:49,452 INFO L225 Difference]: With dead ends: 188 [2018-12-02 05:07:49,452 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 05:07:49,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 986 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2018-12-02 05:07:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 05:07:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 05:07:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 05:07:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 05:07:49,453 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 504 [2018-12-02 05:07:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 05:07:49,453 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 05:07:49,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 05:07:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 05:07:49,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 05:07:49,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 05:07:50,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,759 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,794 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,803 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,804 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,813 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,817 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,835 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,843 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,899 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,907 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,911 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,916 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,918 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,925 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,936 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,959 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,960 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,967 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,971 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,979 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:50,994 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,000 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,005 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,014 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,023 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,056 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,061 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,063 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,070 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,074 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,076 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,084 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,118 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,140 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,142 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,154 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,169 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,180 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,205 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,207 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,214 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,217 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,221 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,222 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,231 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,241 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,247 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,260 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,276 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,312 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,319 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,334 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,349 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,350 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,353 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,355 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,359 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,366 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,376 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,379 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,390 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,409 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,411 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,417 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,420 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,421 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,429 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,436 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,441 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,443 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,453 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,458 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,476 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,480 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 05:07:51,609 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 8 [2018-12-02 05:07:52,368 WARN L180 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 49 [2018-12-02 05:07:53,210 WARN L180 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 45 [2018-12-02 05:07:53,212 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 05:07:53,212 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= main_~x~0 8)) [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-02 05:07:53,212 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-02 05:07:53,213 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (and (<= 4 fibo2_~n) (<= |fibo2_#in~n| 5)))) (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (not (= |fibo2_#in~n| 5))) (<= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) (<= 5 |fibo2_#in~n|) (<= fibo2_~n 3)) (< 1 |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (or (and (<= |fibo2_#t~ret2| 5) (<= 5 |fibo2_#t~ret2|)) .cse0 (<= |fibo2_#in~n| 3) (<= 7 |fibo2_#in~n|)) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (< 4 |fibo2_#in~n|) .cse0) (or (and (<= |fibo2_#t~ret2| 8) (<= 8 |fibo2_#t~ret2|)) (not (= |fibo2_#in~n| 7))))) [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-02 05:07:53,213 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) (not (= |fibo1_#in~n| 4))) (<= fibo1_~n |fibo1_#in~n|) (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (not (= |fibo1_#in~n| 6))) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 fibo1_~n)) (< 1 fibo1_~n) (or (and (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|)) (not (= |fibo1_#in~n| 8))) (or (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (<= |fibo1_#in~n| 4) (<= 6 |fibo1_#in~n|)) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-02 05:07:53,213 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-02 05:07:53,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:07:53 BoogieIcfgContainer [2018-12-02 05:07:53,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 05:07:53,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 05:07:53,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 05:07:53,215 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 05:07:53,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:07:11" (3/4) ... [2018-12-02 05:07:53,218 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 05:07:53,221 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 05:07:53,222 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 05:07:53,222 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-02 05:07:53,222 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-02 05:07:53,224 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-02 05:07:53,224 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-02 05:07:53,225 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 05:07:53,248 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f72673f3-39b4-47b1-a7cd-668c1fac28c5/bin-2019/utaipan/witness.graphml [2018-12-02 05:07:53,248 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 05:07:53,249 INFO L168 Benchmark]: Toolchain (without parser) took 41830.48 ms. Allocated memory was 1.0 GB in the beginning and 4.4 GB in the end (delta: 3.3 GB). Free memory was 950.8 MB in the beginning and 3.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-12-02 05:07:53,249 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:07:53,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.72 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 938.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-12-02 05:07:53,249 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.82 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:07:53,249 INFO L168 Benchmark]: Boogie Preprocessor took 15.26 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 05:07:53,250 INFO L168 Benchmark]: RCFGBuilder took 171.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -171.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-02 05:07:53,250 INFO L168 Benchmark]: TraceAbstraction took 41467.32 ms. Allocated memory was 1.2 GB in the beginning and 4.4 GB in the end (delta: 3.2 GB). Free memory was 1.1 GB in the beginning and 3.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. [2018-12-02 05:07:53,250 INFO L168 Benchmark]: Witness Printer took 32.98 ms. Allocated memory is still 4.4 GB. Free memory was 3.0 GB in the beginning and 3.0 GB in the end (delta: 303.8 kB). Peak memory consumption was 303.8 kB. Max. memory is 11.5 GB. [2018-12-02 05:07:53,251 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.72 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 938.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.82 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.26 ms. Allocated memory is still 1.0 GB. Free memory is still 938.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 171.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -171.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41467.32 ms. Allocated memory was 1.2 GB in the beginning and 4.4 GB in the end (delta: 3.2 GB). Free memory was 1.1 GB in the beginning and 3.0 GB in the end (delta: -1.9 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. * Witness Printer took 32.98 ms. Allocated memory is still 4.4 GB. Free memory was 3.0 GB in the beginning and 3.0 GB in the end (delta: 303.8 kB). Peak memory consumption was 303.8 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 41.4s OverallTime, 23 OverallIterations, 52 TraceHistogramMax, 5.9s AutomataDifference, 0.0s DeadEndRemovalTime, 3.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 845 SDtfs, 1244 SDslu, 8452 SDs, 0 SdLazy, 8050 SolverSat, 1190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 14209 GetRequests, 13297 SyntacticMatches, 267 SemanticMatches, 645 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.9s AbstIntTime, 5 AbstIntIterations, 4 AbstIntStrong, 0.8604060913705583 AbsIntWeakeningRatio, 0.5685279187817259 AbsIntAvgWeakeningVarsNumRemoved, 0.20812182741116753 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 23 MinimizatonAttempts, 415 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 1376 PreInvPairs, 2986 NumberOfFragments, 196 HoareAnnotationTreeSize, 1376 FomulaSimplifications, 1393910 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 43559 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 21.7s InterpolantComputationTime, 13676 NumberOfCodeBlocks, 11985 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 20343 ConstructedInterpolants, 0 QuantifiedInterpolants, 14279834 SizeOfPredicates, 110 NumberOfNonLiveVariables, 10995 ConjunctsInSsa, 487 ConjunctsInUnsatCore, 57 InterpolantComputations, 2 PerfectInterpolantSequences, 256459/284267 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...