./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/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 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 03:45:19,764 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 03:45:19,766 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 03:45:19,774 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 03:45:19,775 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 03:45:19,775 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 03:45:19,776 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 03:45:19,777 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 03:45:19,778 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 03:45:19,779 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 03:45:19,780 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 03:45:19,780 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 03:45:19,780 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 03:45:19,781 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 03:45:19,782 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 03:45:19,782 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 03:45:19,783 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 03:45:19,784 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 03:45:19,785 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 03:45:19,787 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 03:45:19,787 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 03:45:19,788 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 03:45:19,790 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 03:45:19,790 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 03:45:19,790 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 03:45:19,791 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 03:45:19,791 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 03:45:19,792 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 03:45:19,792 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 03:45:19,793 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 03:45:19,793 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 03:45:19,794 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 03:45:19,794 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 03:45:19,794 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 03:45:19,795 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 03:45:19,795 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 03:45:19,795 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 03:45:19,805 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 03:45:19,806 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 03:45:19,806 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 03:45:19,806 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 03:45:19,807 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 03:45:19,807 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 03:45:19,807 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 03:45:19,807 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 03:45:19,807 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 03:45:19,807 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 03:45:19,807 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 03:45:19,808 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 03:45:19,808 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 03:45:19,808 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 03:45:19,808 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 03:45:19,809 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 03:45:19,810 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 03:45:19,810 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 03:45:19,810 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 03:45:19,810 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 03:45:19,810 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 03:45:19,810 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 03:45:19,810 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 03:45:19,811 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 03:45:19,811 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 03:45:19,811 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 03:45:19,811 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 03:45:19,811 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 03:45:19,811 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 03:45:19,812 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 03:45:19,812 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 03:45:19,812 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_a24bb415-fbf7-4480-903d-122d27b3d4f5/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 -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2018-11-23 03:45:19,832 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 03:45:19,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 03:45:19,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 03:45:19,843 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 03:45:19,844 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 03:45:19,844 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 03:45:19,881 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/data/54fe96f07/b7025180d2d74beaafba88b8f2c495dc/FLAGa9d4cb37c [2018-11-23 03:45:20,171 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 03:45:20,171 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 03:45:20,175 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/data/54fe96f07/b7025180d2d74beaafba88b8f2c495dc/FLAGa9d4cb37c [2018-11-23 03:45:20,183 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/data/54fe96f07/b7025180d2d74beaafba88b8f2c495dc [2018-11-23 03:45:20,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 03:45:20,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 03:45:20,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 03:45:20,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 03:45:20,188 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 03:45:20,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342d28a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20, skipping insertion in model container [2018-11-23 03:45:20,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 03:45:20,205 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 03:45:20,300 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 03:45:20,302 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 03:45:20,311 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 03:45:20,319 INFO L195 MainTranslator]: Completed translation [2018-11-23 03:45:20,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20 WrapperNode [2018-11-23 03:45:20,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 03:45:20,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 03:45:20,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 03:45:20,320 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 03:45:20,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 03:45:20,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 03:45:20,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 03:45:20,336 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 03:45:20,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... [2018-11-23 03:45:20,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 03:45:20,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 03:45:20,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 03:45:20,351 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 03:45:20,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 03:45:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-23 03:45:20,434 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-23 03:45:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 03:45:20,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 03:45:20,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 03:45:20,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 03:45:20,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 03:45:20,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 03:45:20,560 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 03:45:20,560 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 03:45:20,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:20 BoogieIcfgContainer [2018-11-23 03:45:20,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 03:45:20,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 03:45:20,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 03:45:20,564 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 03:45:20,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:45:20" (1/3) ... [2018-11-23 03:45:20,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d99671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:45:20, skipping insertion in model container [2018-11-23 03:45:20,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:45:20" (2/3) ... [2018-11-23 03:45:20,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d99671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:45:20, skipping insertion in model container [2018-11-23 03:45:20,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:20" (3/3) ... [2018-11-23 03:45:20,567 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 03:45:20,576 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 03:45:20,582 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 03:45:20,596 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 03:45:20,621 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 03:45:20,621 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 03:45:20,621 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 03:45:20,621 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 03:45:20,622 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 03:45:20,622 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 03:45:20,622 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 03:45:20,622 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 03:45:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-23 03:45:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 03:45:20,641 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:20,641 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:20,643 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:20,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-23 03:45:20,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:20,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:20,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:20,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:20,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 03:45:20,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 03:45:20,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 03:45:20,774 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:45:20,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 03:45:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 03:45:20,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 03:45:20,791 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-23 03:45:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:20,871 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-23 03:45:20,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 03:45:20,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 03:45:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:20,878 INFO L225 Difference]: With dead ends: 36 [2018-11-23 03:45:20,878 INFO L226 Difference]: Without dead ends: 22 [2018-11-23 03:45:20,880 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 [2018-11-23 03:45:20,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-23 03:45:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-23 03:45:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 03:45:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-23 03:45:20,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-23 03:45:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:20,910 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-23 03:45:20,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 03:45:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-23 03:45:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 03:45:20,911 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:20,911 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:20,912 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:20,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-11-23 03:45:20,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:20,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:20,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:20,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:20,913 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 03:45:20,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 03:45:20,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 03:45:20,949 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 03:45:20,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 03:45:20,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 03:45:20,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 03:45:20,951 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-11-23 03:45:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:21,018 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-11-23 03:45:21,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 03:45:21,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-23 03:45:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:21,019 INFO L225 Difference]: With dead ends: 28 [2018-11-23 03:45:21,019 INFO L226 Difference]: Without dead ends: 24 [2018-11-23 03:45:21,020 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 [2018-11-23 03:45:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-23 03:45:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-11-23 03:45:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 03:45:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-23 03:45:21,025 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-11-23 03:45:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:21,026 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-23 03:45:21,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 03:45:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-23 03:45:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 03:45:21,027 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:21,027 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:21,027 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:21,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:21,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-23 03:45:21,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:21,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:21,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:21,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:21,029 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 03:45:21,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:21,097 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:21,098 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-23 03:45:21,099 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [13], [14], [18], [22], [24], [28], [30], [33], [34], [35], [36], [37], [38], [39], [41], [42] [2018-11-23 03:45:21,128 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 03:45:21,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 03:45:21,325 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 03:45:21,326 INFO L272 AbstractInterpreter]: Visited 22 different actions 283 times. Never merged. Never widened. Performed 590 root evaluator evaluations with a maximum evaluation depth of 4. Performed 590 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 32 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-23 03:45:21,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:21,333 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 03:45:21,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:21,333 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:21,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:21,339 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:45:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:21,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 03:45:21,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-23 03:45:21,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:21,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2018-11-23 03:45:21,575 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:21,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 03:45:21,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 03:45:21,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-23 03:45:21,576 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-11-23 03:45:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:21,658 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-23 03:45:21,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 03:45:21,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-11-23 03:45:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:21,659 INFO L225 Difference]: With dead ends: 39 [2018-11-23 03:45:21,659 INFO L226 Difference]: Without dead ends: 24 [2018-11-23 03:45:21,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-11-23 03:45:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-23 03:45:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-23 03:45:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-23 03:45:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-23 03:45:21,664 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-23 03:45:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:21,664 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-23 03:45:21,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 03:45:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-23 03:45:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-23 03:45:21,665 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:21,665 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:21,666 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:21,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:21,666 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-23 03:45:21,666 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:21,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:21,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:21,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:21,667 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 03:45:21,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:21,707 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:21,707 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-11-23 03:45:21,707 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [13], [14], [18], [22], [24], [28], [30], [33], [34], [35], [36], [37], [38], [39], [41], [42] [2018-11-23 03:45:21,709 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 03:45:21,709 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 03:45:22,768 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 03:45:22,768 INFO L272 AbstractInterpreter]: Visited 23 different actions 4122 times. Merged at 10 different actions 1354 times. Never widened. Performed 10130 root evaluator evaluations with a maximum evaluation depth of 4. Performed 10130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 592 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-23 03:45:22,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:22,772 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 03:45:22,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:22,773 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:22,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:22,790 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:45:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:22,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 03:45:22,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-23 03:45:22,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:22,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-11-23 03:45:22,921 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:22,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 03:45:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 03:45:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-23 03:45:22,922 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-11-23 03:45:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:22,963 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-11-23 03:45:22,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 03:45:22,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-11-23 03:45:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:22,965 INFO L225 Difference]: With dead ends: 33 [2018-11-23 03:45:22,965 INFO L226 Difference]: Without dead ends: 29 [2018-11-23 03:45:22,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-23 03:45:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-23 03:45:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-23 03:45:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 03:45:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-23 03:45:22,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-23 03:45:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:22,972 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-23 03:45:22,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 03:45:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-23 03:45:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 03:45:22,973 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:22,973 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:22,974 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:22,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-23 03:45:22,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:22,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:22,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:22,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:22,975 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-23 03:45:23,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:23,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:23,024 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:23,025 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:23,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:23,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:23,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 03:45:23,037 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 03:45:23,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 03:45:23,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:23,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-23 03:45:23,060 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 03:45:23,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:23,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-11-23 03:45:23,193 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:23,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 03:45:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 03:45:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-23 03:45:23,193 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 6 states. [2018-11-23 03:45:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:23,231 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2018-11-23 03:45:23,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 03:45:23,233 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-11-23 03:45:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:23,234 INFO L225 Difference]: With dead ends: 39 [2018-11-23 03:45:23,234 INFO L226 Difference]: Without dead ends: 35 [2018-11-23 03:45:23,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-23 03:45:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-23 03:45:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2018-11-23 03:45:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 03:45:23,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-23 03:45:23,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 41 [2018-11-23 03:45:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:23,241 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-23 03:45:23,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 03:45:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-23 03:45:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-23 03:45:23,243 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:23,243 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:23,243 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:23,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-11-23 03:45:23,243 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:23,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:23,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:23,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:23,244 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 03:45:23,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:23,297 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:23,297 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:23,297 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:23,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:23,297 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:23,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 03:45:23,314 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 03:45:23,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 03:45:23,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:23,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 03:45:23,347 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-23 03:45:23,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:23,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 12 [2018-11-23 03:45:23,534 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:23,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 03:45:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 03:45:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-23 03:45:23,535 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 7 states. [2018-11-23 03:45:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:23,596 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2018-11-23 03:45:23,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 03:45:23,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2018-11-23 03:45:23,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:23,597 INFO L225 Difference]: With dead ends: 41 [2018-11-23 03:45:23,597 INFO L226 Difference]: Without dead ends: 37 [2018-11-23 03:45:23,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-11-23 03:45:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-23 03:45:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-23 03:45:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-23 03:45:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-11-23 03:45:23,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 42 [2018-11-23 03:45:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:23,603 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-11-23 03:45:23,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 03:45:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-11-23 03:45:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-23 03:45:23,604 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:23,604 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:23,605 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:23,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1539529542, now seen corresponding path program 4 times [2018-11-23 03:45:23,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:23,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:23,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:23,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:23,606 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-23 03:45:23,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:23,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:23,689 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:23,689 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:23,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:23,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:23,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:23,697 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:45:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:23,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-23 03:45:23,768 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-23 03:45:24,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:24,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2018-11-23 03:45:24,094 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:24,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 03:45:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 03:45:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-11-23 03:45:24,095 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 14 states. [2018-11-23 03:45:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:24,396 INFO L93 Difference]: Finished difference Result 80 states and 135 transitions. [2018-11-23 03:45:24,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 03:45:24,397 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2018-11-23 03:45:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:24,398 INFO L225 Difference]: With dead ends: 80 [2018-11-23 03:45:24,399 INFO L226 Difference]: Without dead ends: 51 [2018-11-23 03:45:24,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 03:45:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-23 03:45:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2018-11-23 03:45:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 03:45:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2018-11-23 03:45:24,409 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 68 [2018-11-23 03:45:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:24,409 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2018-11-23 03:45:24,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 03:45:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2018-11-23 03:45:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-23 03:45:24,410 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:24,410 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:24,411 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:24,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash 946234379, now seen corresponding path program 5 times [2018-11-23 03:45:24,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:24,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:24,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:24,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:24,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-23 03:45:24,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:24,490 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:24,490 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:24,490 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:24,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:24,490 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:24,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 03:45:24,497 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 03:45:24,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 03:45:24,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:24,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 41 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-11-23 03:45:24,526 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 50 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-11-23 03:45:24,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:24,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2018-11-23 03:45:24,746 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:24,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 03:45:24,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 03:45:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-23 03:45:24,747 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 8 states. [2018-11-23 03:45:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:24,806 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2018-11-23 03:45:24,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 03:45:24,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2018-11-23 03:45:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:24,807 INFO L225 Difference]: With dead ends: 56 [2018-11-23 03:45:24,807 INFO L226 Difference]: Without dead ends: 52 [2018-11-23 03:45:24,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 214 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2018-11-23 03:45:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-23 03:45:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2018-11-23 03:45:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 03:45:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2018-11-23 03:45:24,812 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 110 [2018-11-23 03:45:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:24,813 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2018-11-23 03:45:24,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 03:45:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2018-11-23 03:45:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-23 03:45:24,814 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:24,815 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:24,815 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:24,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash 551748881, now seen corresponding path program 6 times [2018-11-23 03:45:24,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:24,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:24,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:24,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:24,816 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-11-23 03:45:24,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:24,902 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:24,902 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:24,902 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:24,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:24,902 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:24,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 03:45:24,912 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 03:45:24,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 03:45:24,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:24,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 189 proven. 343 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2018-11-23 03:45:24,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 365 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2018-11-23 03:45:25,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:25,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 18] total 23 [2018-11-23 03:45:25,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:25,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 03:45:25,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 03:45:25,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2018-11-23 03:45:25,674 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 15 states. [2018-11-23 03:45:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:25,902 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2018-11-23 03:45:25,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-23 03:45:25,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 137 [2018-11-23 03:45:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:25,904 INFO L225 Difference]: With dead ends: 112 [2018-11-23 03:45:25,904 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 03:45:25,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 03:45:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 03:45:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-11-23 03:45:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-23 03:45:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2018-11-23 03:45:25,911 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 137 [2018-11-23 03:45:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:25,911 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2018-11-23 03:45:25,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 03:45:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2018-11-23 03:45:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-23 03:45:25,913 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:25,913 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:25,913 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:25,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1288458278, now seen corresponding path program 7 times [2018-11-23 03:45:25,913 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:25,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:25,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:25,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:25,914 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 669 proven. 122 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-11-23 03:45:26,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:26,039 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:26,039 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:26,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:26,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:26,039 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:26,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:26,045 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:45:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:26,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 653 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-11-23 03:45:26,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 103 proven. 693 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2018-11-23 03:45:26,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:26,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 15] total 26 [2018-11-23 03:45:26,824 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:26,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 03:45:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 03:45:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2018-11-23 03:45:26,825 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 18 states. [2018-11-23 03:45:27,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:27,159 INFO L93 Difference]: Finished difference Result 145 states and 229 transitions. [2018-11-23 03:45:27,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-23 03:45:27,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 205 [2018-11-23 03:45:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:27,160 INFO L225 Difference]: With dead ends: 145 [2018-11-23 03:45:27,161 INFO L226 Difference]: Without dead ends: 87 [2018-11-23 03:45:27,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 389 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=508, Invalid=1562, Unknown=0, NotChecked=0, Total=2070 [2018-11-23 03:45:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-23 03:45:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2018-11-23 03:45:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-23 03:45:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2018-11-23 03:45:27,171 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 205 [2018-11-23 03:45:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:27,171 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2018-11-23 03:45:27,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 03:45:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2018-11-23 03:45:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-11-23 03:45:27,177 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:27,177 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:27,177 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:27,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash 521950619, now seen corresponding path program 8 times [2018-11-23 03:45:27,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:27,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:27,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:27,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:27,178 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 248 proven. 1232 refuted. 0 times theorem prover too weak. 5640 trivial. 0 not checked. [2018-11-23 03:45:27,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:27,299 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:27,299 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:27,300 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:27,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:27,300 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:27,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 03:45:27,310 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 03:45:27,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-11-23 03:45:27,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:27,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1019 proven. 219 refuted. 0 times theorem prover too weak. 5882 trivial. 0 not checked. [2018-11-23 03:45:27,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1025 proven. 245 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2018-11-23 03:45:28,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:28,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2018-11-23 03:45:28,134 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:28,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 03:45:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 03:45:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-11-23 03:45:28,135 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand 13 states. [2018-11-23 03:45:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:28,263 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2018-11-23 03:45:28,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 03:45:28,263 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 355 [2018-11-23 03:45:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:28,265 INFO L225 Difference]: With dead ends: 96 [2018-11-23 03:45:28,265 INFO L226 Difference]: Without dead ends: 90 [2018-11-23 03:45:28,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 697 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2018-11-23 03:45:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-23 03:45:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-23 03:45:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-23 03:45:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 135 transitions. [2018-11-23 03:45:28,274 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 135 transitions. Word has length 355 [2018-11-23 03:45:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:28,275 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 135 transitions. [2018-11-23 03:45:28,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 03:45:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 135 transitions. [2018-11-23 03:45:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2018-11-23 03:45:28,310 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:28,310 INFO L402 BasicCegarLoop]: trace histogram [175, 175, 142, 87, 87, 87, 87, 87, 87, 87, 55, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:28,310 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:28,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:28,311 INFO L82 PathProgramCache]: Analyzing trace with hash -497666383, now seen corresponding path program 9 times [2018-11-23 03:45:28,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:28,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:28,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:28,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:28,312 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 2520 proven. 6657 refuted. 0 times theorem prover too weak. 76698 trivial. 0 not checked. [2018-11-23 03:45:28,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:28,983 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:28,984 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:28,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:28,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:28,984 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:28,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 03:45:28,990 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 03:45:29,149 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 03:45:29,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:29,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 39097 proven. 2092 refuted. 0 times theorem prover too weak. 44686 trivial. 0 not checked. [2018-11-23 03:45:29,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 85875 backedges. 1856 proven. 10113 refuted. 0 times theorem prover too weak. 73906 trivial. 0 not checked. [2018-11-23 03:45:33,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:33,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 26] total 33 [2018-11-23 03:45:33,048 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:33,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 03:45:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 03:45:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 03:45:33,050 INFO L87 Difference]: Start difference. First operand 90 states and 135 transitions. Second operand 21 states. [2018-11-23 03:45:33,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:33,507 INFO L93 Difference]: Finished difference Result 196 states and 364 transitions. [2018-11-23 03:45:33,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-23 03:45:33,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1200 [2018-11-23 03:45:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:33,509 INFO L225 Difference]: With dead ends: 196 [2018-11-23 03:45:33,509 INFO L226 Difference]: Without dead ends: 113 [2018-11-23 03:45:33,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2443 GetRequests, 2363 SyntacticMatches, 24 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=821, Invalid=2485, Unknown=0, NotChecked=0, Total=3306 [2018-11-23 03:45:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-23 03:45:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2018-11-23 03:45:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-23 03:45:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 149 transitions. [2018-11-23 03:45:33,522 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 149 transitions. Word has length 1200 [2018-11-23 03:45:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:33,523 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 149 transitions. [2018-11-23 03:45:33,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 03:45:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 149 transitions. [2018-11-23 03:45:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1200 [2018-11-23 03:45:33,534 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:33,535 INFO L402 BasicCegarLoop]: trace histogram [175, 175, 141, 87, 87, 87, 87, 87, 87, 87, 54, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:33,535 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:33,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash 38151605, now seen corresponding path program 10 times [2018-11-23 03:45:33,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:33,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:33,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:33,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:33,536 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 85734 backedges. 3623 proven. 5934 refuted. 0 times theorem prover too weak. 76177 trivial. 0 not checked. [2018-11-23 03:45:34,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:34,074 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:34,074 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:34,074 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:34,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:34,074 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:34,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:34,080 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 03:45:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:34,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 85734 backedges. 44958 proven. 3857 refuted. 0 times theorem prover too weak. 36919 trivial. 0 not checked. [2018-11-23 03:45:34,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 85734 backedges. 2528 proven. 10710 refuted. 0 times theorem prover too weak. 72496 trivial. 0 not checked. [2018-11-23 03:45:38,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:38,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 30] total 37 [2018-11-23 03:45:38,477 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:38,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 03:45:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 03:45:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 03:45:38,478 INFO L87 Difference]: Start difference. First operand 102 states and 149 transitions. Second operand 23 states. [2018-11-23 03:45:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:39,044 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2018-11-23 03:45:39,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-23 03:45:39,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1199 [2018-11-23 03:45:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:39,050 INFO L225 Difference]: With dead ends: 224 [2018-11-23 03:45:39,050 INFO L226 Difference]: Without dead ends: 129 [2018-11-23 03:45:39,051 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2448 GetRequests, 2355 SyntacticMatches, 28 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1071, Invalid=3351, Unknown=0, NotChecked=0, Total=4422 [2018-11-23 03:45:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-23 03:45:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2018-11-23 03:45:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-23 03:45:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2018-11-23 03:45:39,058 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 1199 [2018-11-23 03:45:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:39,058 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2018-11-23 03:45:39,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 03:45:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2018-11-23 03:45:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1146 [2018-11-23 03:45:39,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:39,065 INFO L402 BasicCegarLoop]: trace histogram [167, 167, 135, 83, 83, 83, 83, 83, 83, 83, 52, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:39,065 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:39,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989131, now seen corresponding path program 11 times [2018-11-23 03:45:39,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:39,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:39,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 03:45:39,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:39,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 78101 backedges. 6722 proven. 4115 refuted. 0 times theorem prover too weak. 67264 trivial. 0 not checked. [2018-11-23 03:45:39,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:39,777 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:39,777 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:39,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:39,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:39,777 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 03:45:39,784 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 03:45:39,784 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 03:45:40,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-11-23 03:45:40,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:40,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 78101 backedges. 4628 proven. 7078 refuted. 0 times theorem prover too weak. 66395 trivial. 0 not checked. [2018-11-23 03:45:40,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 78101 backedges. 4628 proven. 7183 refuted. 0 times theorem prover too weak. 66290 trivial. 0 not checked. [2018-11-23 03:45:43,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:45:43,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 29] total 38 [2018-11-23 03:45:43,564 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:45:43,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 03:45:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 03:45:43,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 03:45:43,565 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand 25 states. [2018-11-23 03:45:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:45:44,239 INFO L93 Difference]: Finished difference Result 259 states and 455 transitions. [2018-11-23 03:45:44,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-23 03:45:44,240 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1145 [2018-11-23 03:45:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:45:44,242 INFO L225 Difference]: With dead ends: 259 [2018-11-23 03:45:44,242 INFO L226 Difference]: Without dead ends: 152 [2018-11-23 03:45:44,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2350 GetRequests, 2251 SyntacticMatches, 27 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1258, Invalid=4144, Unknown=0, NotChecked=0, Total=5402 [2018-11-23 03:45:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-11-23 03:45:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2018-11-23 03:45:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-23 03:45:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 186 transitions. [2018-11-23 03:45:44,251 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 186 transitions. Word has length 1145 [2018-11-23 03:45:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:45:44,252 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 186 transitions. [2018-11-23 03:45:44,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 03:45:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 186 transitions. [2018-11-23 03:45:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-11-23 03:45:44,256 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 03:45:44,256 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 03:45:44,256 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 03:45:44,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 03:45:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 12 times [2018-11-23 03:45:44,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 03:45:44,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:44,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 03:45:44,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 03:45:44,257 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 03:45:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 03:45:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 03:45:44,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:44,731 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 03:45:44,732 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 03:45:44,732 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 03:45:44,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 03:45:44,732 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/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 [2018-11-23 03:45:44,739 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 03:45:44,739 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 03:45:44,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 03:45:44,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 03:45:44,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 03:45:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 03:45:45,309 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 03:45:46,859 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:45:47,069 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:45:47,282 WARN L180 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:45:47,494 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:45:48,973 WARN L180 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-23 03:45:49,481 WARN L180 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-23 03:45:50,003 WARN L180 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-23 03:45:50,523 WARN L180 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-23 03:45:52,051 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:45:52,268 WARN L180 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:45:52,481 WARN L180 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:45:52,695 WARN L180 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:45:53,980 WARN L180 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 491 [2018-11-23 03:45:55,258 WARN L180 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 491 [2018-11-23 03:45:56,584 WARN L180 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 493 [2018-11-23 03:45:57,951 WARN L180 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 493 [2018-11-23 03:45:59,610 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:45:59,815 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:46:00,026 WARN L180 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:46:00,234 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:46:04,971 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:46:05,174 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:46:05,383 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:46:05,593 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:46:07,017 WARN L180 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-23 03:46:07,522 WARN L180 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-23 03:46:08,038 WARN L180 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-23 03:46:08,553 WARN L180 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-23 03:46:12,269 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:46:12,473 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 03:46:12,682 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:46:12,891 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 03:46:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 03:46:16,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 03:46:16,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-11-23 03:46:16,132 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 03:46:16,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 03:46:16,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 03:46:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 03:46:16,133 INFO L87 Difference]: Start difference. First operand 130 states and 186 transitions. Second operand 36 states. [2018-11-23 03:46:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 03:46:16,227 INFO L93 Difference]: Finished difference Result 131 states and 187 transitions. [2018-11-23 03:46:16,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 03:46:16,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-11-23 03:46:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 03:46:16,228 INFO L225 Difference]: With dead ends: 131 [2018-11-23 03:46:16,228 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 03:46:16,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1721 GetRequests, 1468 SyntacticMatches, 218 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 03:46:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 03:46:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 03:46:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 03:46:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 03:46:16,229 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-11-23 03:46:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 03:46:16,230 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 03:46:16,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 03:46:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 03:46:16,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 03:46:16,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 03:46:16,659 WARN L180 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2018-11-23 03:46:16,661 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-23 03:46:16,661 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-23 03:46:16,661 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-23 03:46:16,661 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-23 03:46:16,661 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (or (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6)) (<= 13 |fibonacci_#t~ret0|) (and (<= 3 |fibonacci_#t~ret0|) (<= fibonacci_~n 5)) (< |fibonacci_#in~n| 5) (and (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7))) (<= 1 |fibonacci_#t~ret0|) (< 1 |fibonacci_#in~n|) (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= |fibonacci_#in~n| 8) .cse1) (and (<= 21 |fibonacci_#t~ret0|) .cse0 .cse1))) (or (< |fibonacci_#in~n| 4) (<= 2 |fibonacci_#t~ret0|))) [2018-11-23 03:46:16,661 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 03:46:16,662 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-23 03:46:16,662 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-23 03:46:16,662 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-23 03:46:16,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:46:16 BoogieIcfgContainer [2018-11-23 03:46:16,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 03:46:16,665 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 03:46:16,665 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 03:46:16,665 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 03:46:16,665 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:45:20" (3/4) ... [2018-11-23 03:46:16,668 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 03:46:16,673 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-23 03:46:16,673 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 03:46:16,673 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 03:46:16,676 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 03:46:16,676 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 03:46:16,676 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 03:46:16,704 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a24bb415-fbf7-4480-903d-122d27b3d4f5/bin-2019/utaipan/witness.graphml [2018-11-23 03:46:16,705 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 03:46:16,705 INFO L168 Benchmark]: Toolchain (without parser) took 56520.08 ms. Allocated memory was 1.0 GB in the beginning and 3.8 GB in the end (delta: 2.8 GB). Free memory was 953.8 MB in the beginning and 3.6 GB in the end (delta: -2.6 GB). Peak memory consumption was 181.4 MB. Max. memory is 11.5 GB. [2018-11-23 03:46:16,706 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 03:46:16,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.33 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 03:46:16,707 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.29 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 03:46:16,707 INFO L168 Benchmark]: Boogie Preprocessor took 14.18 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 03:46:16,707 INFO L168 Benchmark]: RCFGBuilder took 209.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 03:46:16,707 INFO L168 Benchmark]: TraceAbstraction took 56103.06 ms. Allocated memory was 1.2 GB in the beginning and 3.8 GB in the end (delta: 2.6 GB). Free memory was 1.1 GB in the beginning and 3.6 GB in the end (delta: -2.4 GB). Peak memory consumption was 210.6 MB. Max. memory is 11.5 GB. [2018-11-23 03:46:16,708 INFO L168 Benchmark]: Witness Printer took 40.01 ms. Allocated memory is still 3.8 GB. Free memory is still 3.6 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 03:46:16,709 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 133.33 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.29 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.18 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 209.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 56103.06 ms. Allocated memory was 1.2 GB in the beginning and 3.8 GB in the end (delta: 2.6 GB). Free memory was 1.1 GB in the beginning and 3.6 GB in the end (delta: -2.4 GB). Peak memory consumption was 210.6 MB. Max. memory is 11.5 GB. * Witness Printer took 40.01 ms. Allocated memory is still 3.8 GB. Free memory is still 3.6 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 4 procedures, 24 locations, 1 error locations. SAFE Result, 56.0s OverallTime, 15 OverallIterations, 175 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 394 SDtfs, 1134 SDslu, 1679 SDs, 0 SdLazy, 2944 SolverSat, 1212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11155 GetRequests, 10361 SyntacticMatches, 361 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10310 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 75 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 293 PreInvPairs, 389 NumberOfFragments, 82 HoareAnnotationTreeSize, 293 FomulaSimplifications, 834 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2565 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 47.6s InterpolantComputationTime, 10643 NumberOfCodeBlocks, 9855 NumberOfCodeBlocksAsserted, 152 NumberOfCheckSat, 15909 ConstructedInterpolants, 0 QuantifiedInterpolants, 19600162 SizeOfPredicates, 95 NumberOfNonLiveVariables, 9911 ConjunctsInSsa, 389 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 804747/881925 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...