./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_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_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 7e40a98558d0111ea95f3ee60a44cc14c7768182 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 15:42:58,250 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 15:42:58,251 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 15:42:58,257 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 15:42:58,257 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 15:42:58,258 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 15:42:58,259 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 15:42:58,260 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 15:42:58,261 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 15:42:58,261 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 15:42:58,262 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 15:42:58,262 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 15:42:58,263 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 15:42:58,263 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 15:42:58,264 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 15:42:58,265 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 15:42:58,265 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 15:42:58,267 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 15:42:58,268 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 15:42:58,269 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 15:42:58,270 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 15:42:58,271 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 15:42:58,272 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 15:42:58,272 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 15:42:58,273 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 15:42:58,273 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 15:42:58,274 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 15:42:58,274 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 15:42:58,275 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 15:42:58,276 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 15:42:58,276 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 15:42:58,277 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 15:42:58,277 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 15:42:58,277 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 15:42:58,278 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 15:42:58,278 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 15:42:58,278 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 15:42:58,286 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 15:42:58,286 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 15:42:58,287 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 15:42:58,287 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 15:42:58,287 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 15:42:58,288 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 15:42:58,288 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 15:42:58,288 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 15:42:58,288 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 15:42:58,288 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 15:42:58,288 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 15:42:58,289 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 15:42:58,289 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 15:42:58,289 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 15:42:58,289 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 15:42:58,290 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 15:42:58,290 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 15:42:58,290 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 15:42:58,290 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 15:42:58,290 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 15:42:58,290 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 15:42:58,291 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 15:42:58,291 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 15:42:58,291 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 15:42:58,291 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 15:42:58,291 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 15:42:58,291 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 15:42:58,291 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:42:58,292 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 15:42:58,292 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 15:42:58,293 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 15:42:58,293 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_14b3bd2c-2321-4ea8-9533-720480a05e42/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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-23 15:42:58,316 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 15:42:58,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 15:42:58,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 15:42:58,329 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 15:42:58,329 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 15:42:58,330 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 15:42:58,368 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/data/cd33d26ae/3b831cad156f44dc92b5e47c3ec7d3d6/FLAGfa5e6e146 [2018-11-23 15:42:58,761 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 15:42:58,761 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 15:42:58,765 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/data/cd33d26ae/3b831cad156f44dc92b5e47c3ec7d3d6/FLAGfa5e6e146 [2018-11-23 15:42:58,775 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/data/cd33d26ae/3b831cad156f44dc92b5e47c3ec7d3d6 [2018-11-23 15:42:58,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 15:42:58,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 15:42:58,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 15:42:58,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 15:42:58,781 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 15:42:58,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f3468e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58, skipping insertion in model container [2018-11-23 15:42:58,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 15:42:58,799 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 15:42:58,902 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:42:58,904 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 15:42:58,913 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:42:58,921 INFO L195 MainTranslator]: Completed translation [2018-11-23 15:42:58,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58 WrapperNode [2018-11-23 15:42:58,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 15:42:58,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 15:42:58,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 15:42:58,922 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 15:42:58,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 15:42:58,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 15:42:58,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 15:42:58,934 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 15:42:58,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... [2018-11-23 15:42:58,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 15:42:58,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 15:42:58,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 15:42:58,945 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 15:42:58,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:42:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-23 15:42:59,027 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-23 15:42:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 15:42:59,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 15:42:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 15:42:59,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 15:42:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 15:42:59,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 15:42:59,137 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 15:42:59,138 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 15:42:59,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:42:59 BoogieIcfgContainer [2018-11-23 15:42:59,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 15:42:59,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 15:42:59,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 15:42:59,142 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 15:42:59,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:42:58" (1/3) ... [2018-11-23 15:42:59,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dde954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:42:59, skipping insertion in model container [2018-11-23 15:42:59,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:42:58" (2/3) ... [2018-11-23 15:42:59,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dde954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:42:59, skipping insertion in model container [2018-11-23 15:42:59,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:42:59" (3/3) ... [2018-11-23 15:42:59,145 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 15:42:59,153 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 15:42:59,159 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 15:42:59,174 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 15:42:59,199 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 15:42:59,200 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 15:42:59,200 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 15:42:59,200 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 15:42:59,200 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 15:42:59,200 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 15:42:59,200 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 15:42:59,200 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 15:42:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-23 15:42:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 15:42:59,219 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:42:59,220 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:42:59,221 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:42:59,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:42:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-11-23 15:42:59,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:42:59,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:42:59,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:42:59,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:42:59,266 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:42:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:42:59,357 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 15:42:59,358 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:42:59,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:42:59,358 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:42:59,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:42:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:42:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:42:59,370 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-23 15:42:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:42:59,438 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-11-23 15:42:59,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:42:59,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 15:42:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:42:59,445 INFO L225 Difference]: With dead ends: 33 [2018-11-23 15:42:59,445 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 15:42:59,447 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 15:42:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 15:42:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 15:42:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 15:42:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 15:42:59,473 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-23 15:42:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:42:59,474 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 15:42:59,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:42:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 15:42:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 15:42:59,475 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:42:59,475 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:42:59,476 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:42:59,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:42:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-11-23 15:42:59,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:42:59,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:42:59,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:42:59,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:42:59,477 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:42:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:42:59,519 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 15:42:59,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:42:59,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:42:59,520 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:42:59,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:42:59,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:42:59,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:42:59,522 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-23 15:42:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:42:59,580 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-23 15:42:59,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:42:59,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 15:42:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:42:59,581 INFO L225 Difference]: With dead ends: 27 [2018-11-23 15:42:59,581 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 15:42:59,582 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 15:42:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 15:42:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-23 15:42:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 15:42:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 15:42:59,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-23 15:42:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:42:59,587 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 15:42:59,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:42:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 15:42:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 15:42:59,588 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:42:59,588 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] [2018-11-23 15:42:59,589 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:42:59,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:42:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-11-23 15:42:59,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:42:59,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:42:59,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:42:59,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:42:59,590 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:42:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:42:59,652 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 15:42:59,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:42:59,652 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:42:59,653 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-23 15:42:59,654 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [13], [14], [18], [20], [24], [26], [29], [30], [31], [32], [33], [34], [35], [37], [38] [2018-11-23 15:42:59,677 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:42:59,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:43:00,094 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 15:43:00,095 INFO L272 AbstractInterpreter]: Visited 17 different actions 915 times. Never merged. Widened at 2 different actions 83 times. Performed 1943 root evaluator evaluations with a maximum evaluation depth of 4. Performed 1943 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 89 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-23 15:43:00,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:00,108 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 15:43:00,138 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 15:43:00,138 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 15:43:00,160 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-23 15:43:00,160 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 15:43:00,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 15:43:00,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-23 15:43:00,161 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:43:00,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 15:43:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 15:43:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 15:43:00,162 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2018-11-23 15:43:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:00,358 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2018-11-23 15:43:00,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 15:43:00,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-23 15:43:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:00,359 INFO L225 Difference]: With dead ends: 54 [2018-11-23 15:43:00,359 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 15:43:00,360 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-23 15:43:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 15:43:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-23 15:43:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-23 15:43:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-11-23 15:43:00,369 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2018-11-23 15:43:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:00,369 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-11-23 15:43:00,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 15:43:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-11-23 15:43:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 15:43:00,370 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:00,370 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] [2018-11-23 15:43:00,371 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:00,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2018-11-23 15:43:00,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:00,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:00,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:00,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:00,374 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-23 15:43:00,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:00,454 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:00,454 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:00,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:00,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:00,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:00,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:43:00,469 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:43:00,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 15:43:00,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:00,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 15:43:00,559 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-23 15:43:00,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:00,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2018-11-23 15:43:00,795 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:00,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 15:43:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 15:43:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-23 15:43:00,796 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2018-11-23 15:43:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:00,922 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2018-11-23 15:43:00,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 15:43:00,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-11-23 15:43:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:00,925 INFO L225 Difference]: With dead ends: 73 [2018-11-23 15:43:00,925 INFO L226 Difference]: Without dead ends: 47 [2018-11-23 15:43:00,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-11-23 15:43:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-23 15:43:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2018-11-23 15:43:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 15:43:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-11-23 15:43:00,934 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 39 [2018-11-23 15:43:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:00,935 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-11-23 15:43:00,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 15:43:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-11-23 15:43:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 15:43:00,936 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:00,937 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] [2018-11-23 15:43:00,937 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:00,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:00,937 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 1 times [2018-11-23 15:43:00,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:00,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:00,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:00,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:00,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:00,996 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 15:43:00,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:00,996 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:00,996 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-11-23 15:43:00,997 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [13], [14], [18], [20], [24], [26], [29], [30], [31], [32], [33], [34], [35], [37], [38] [2018-11-23 15:43:00,998 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:43:00,998 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:43:13,741 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 15:43:13,741 INFO L272 AbstractInterpreter]: Visited 22 different actions 127888 times. Merged at 10 different actions 40987 times. Widened at 2 different actions 7475 times. Performed 328376 root evaluator evaluations with a maximum evaluation depth of 4. Performed 328376 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 17048 fixpoints after 5 different actions. Largest state had 5 variables. [2018-11-23 15:43:13,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:13,745 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 15:43:13,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:13,745 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:13,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:13,751 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:43:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:13,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:13,786 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 15:43:13,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:13,966 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 15:43:13,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:13,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 11 [2018-11-23 15:43:13,981 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:13,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 15:43:13,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 15:43:13,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-23 15:43:13,982 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2018-11-23 15:43:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:14,035 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2018-11-23 15:43:14,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 15:43:14,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-11-23 15:43:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:14,036 INFO L225 Difference]: With dead ends: 70 [2018-11-23 15:43:14,036 INFO L226 Difference]: Without dead ends: 56 [2018-11-23 15:43:14,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-23 15:43:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-23 15:43:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2018-11-23 15:43:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-23 15:43:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2018-11-23 15:43:14,043 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 41 [2018-11-23 15:43:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:14,043 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2018-11-23 15:43:14,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 15:43:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2018-11-23 15:43:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-23 15:43:14,044 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:14,044 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] [2018-11-23 15:43:14,044 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:14,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:14,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1559307686, now seen corresponding path program 2 times [2018-11-23 15:43:14,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:14,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:14,046 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:14,147 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 15:43:14,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:14,147 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:14,147 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:14,147 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:14,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:14,147 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:14,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:43:14,157 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:43:14,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-23 15:43:14,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:14,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-11-23 15:43:14,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-11-23 15:43:14,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:14,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 17 [2018-11-23 15:43:14,396 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:14,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 15:43:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 15:43:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-11-23 15:43:14,397 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 13 states. [2018-11-23 15:43:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:14,615 INFO L93 Difference]: Finished difference Result 98 states and 144 transitions. [2018-11-23 15:43:14,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 15:43:14,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2018-11-23 15:43:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:14,618 INFO L225 Difference]: With dead ends: 98 [2018-11-23 15:43:14,618 INFO L226 Difference]: Without dead ends: 68 [2018-11-23 15:43:14,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2018-11-23 15:43:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-23 15:43:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2018-11-23 15:43:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-23 15:43:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2018-11-23 15:43:14,627 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 67 [2018-11-23 15:43:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:14,627 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2018-11-23 15:43:14,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 15:43:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2018-11-23 15:43:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-23 15:43:14,630 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:14,630 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:14,630 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:14,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 3 times [2018-11-23 15:43:14,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:14,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:14,631 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-23 15:43:14,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:14,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:14,729 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:14,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:14,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:14,729 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:14,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 15:43:14,735 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 15:43:14,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 15:43:14,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:14,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-23 15:43:14,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:15,206 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2018-11-23 15:43:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2018-11-23 15:43:15,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:15,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 20 [2018-11-23 15:43:15,314 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:15,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 15:43:15,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 15:43:15,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:43:15,315 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand 15 states. [2018-11-23 15:43:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:15,537 INFO L93 Difference]: Finished difference Result 132 states and 201 transitions. [2018-11-23 15:43:15,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 15:43:15,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2018-11-23 15:43:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:15,539 INFO L225 Difference]: With dead ends: 132 [2018-11-23 15:43:15,539 INFO L226 Difference]: Without dead ends: 76 [2018-11-23 15:43:15,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2018-11-23 15:43:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-23 15:43:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2018-11-23 15:43:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-23 15:43:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2018-11-23 15:43:15,551 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 96 [2018-11-23 15:43:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:15,551 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2018-11-23 15:43:15,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 15:43:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2018-11-23 15:43:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-23 15:43:15,553 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:15,553 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] [2018-11-23 15:43:15,553 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:15,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 4 times [2018-11-23 15:43:15,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:15,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:15,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:15,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:15,554 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:15,623 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 15:43:15,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:15,623 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:15,623 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:15,623 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:15,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:15,623 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:15,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:15,630 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:43:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:15,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-11-23 15:43:15,674 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-23 15:43:16,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:16,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 15 [2018-11-23 15:43:16,093 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:16,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 15:43:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 15:43:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-23 15:43:16,094 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 9 states. [2018-11-23 15:43:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:16,154 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2018-11-23 15:43:16,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 15:43:16,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-11-23 15:43:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:16,156 INFO L225 Difference]: With dead ends: 92 [2018-11-23 15:43:16,156 INFO L226 Difference]: Without dead ends: 78 [2018-11-23 15:43:16,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:43:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-23 15:43:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2018-11-23 15:43:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-23 15:43:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2018-11-23 15:43:16,164 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 109 [2018-11-23 15:43:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:16,165 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2018-11-23 15:43:16,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 15:43:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2018-11-23 15:43:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-23 15:43:16,167 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:16,167 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] [2018-11-23 15:43:16,168 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:16,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1510121204, now seen corresponding path program 5 times [2018-11-23 15:43:16,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:16,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:16,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:16,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:16,169 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-11-23 15:43:16,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:16,270 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:16,270 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:16,270 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:16,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:16,271 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:16,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:43:16,277 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:43:16,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-23 15:43:16,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:16,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 433 proven. 94 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-11-23 15:43:16,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 437 proven. 107 refuted. 0 times theorem prover too weak. 1697 trivial. 0 not checked. [2018-11-23 15:43:16,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:16,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2018-11-23 15:43:16,712 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:16,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 15:43:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 15:43:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-11-23 15:43:16,713 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2018-11-23 15:43:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:16,782 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2018-11-23 15:43:16,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 15:43:16,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 204 [2018-11-23 15:43:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:16,783 INFO L225 Difference]: With dead ends: 85 [2018-11-23 15:43:16,783 INFO L226 Difference]: Without dead ends: 78 [2018-11-23 15:43:16,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 398 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-11-23 15:43:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-23 15:43:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2018-11-23 15:43:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-23 15:43:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2018-11-23 15:43:16,791 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 204 [2018-11-23 15:43:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:16,792 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2018-11-23 15:43:16,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 15:43:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2018-11-23 15:43:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-23 15:43:16,794 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:16,795 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:16,795 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:16,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:16,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1009195755, now seen corresponding path program 6 times [2018-11-23 15:43:16,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:16,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:16,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:16,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:16,796 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-11-23 15:43:16,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:16,920 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:16,920 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:16,920 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:16,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:16,920 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:16,927 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 15:43:16,927 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 15:43:16,961 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 15:43:16,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:16,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2018-11-23 15:43:17,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 756 refuted. 0 times theorem prover too weak. 1716 trivial. 0 not checked. [2018-11-23 15:43:17,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:17,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 15] total 17 [2018-11-23 15:43:17,712 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:17,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 15:43:17,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 15:43:17,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-11-23 15:43:17,713 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 10 states. [2018-11-23 15:43:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:17,789 INFO L93 Difference]: Finished difference Result 97 states and 144 transitions. [2018-11-23 15:43:17,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 15:43:17,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 218 [2018-11-23 15:43:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:17,790 INFO L225 Difference]: With dead ends: 97 [2018-11-23 15:43:17,790 INFO L226 Difference]: Without dead ends: 83 [2018-11-23 15:43:17,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 421 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-11-23 15:43:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-23 15:43:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2018-11-23 15:43:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-23 15:43:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2018-11-23 15:43:17,796 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 218 [2018-11-23 15:43:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:17,796 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2018-11-23 15:43:17,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 15:43:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2018-11-23 15:43:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-11-23 15:43:17,800 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:17,800 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:17,801 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:17,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1058976484, now seen corresponding path program 7 times [2018-11-23 15:43:17,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:17,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:17,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:17,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:17,802 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 814 proven. 621 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2018-11-23 15:43:17,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:17,965 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:17,965 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:17,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:17,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:17,965 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:17,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:17,971 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:43:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:18,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2018-11-23 15:43:18,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1316 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2018-11-23 15:43:19,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:19,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 17] total 27 [2018-11-23 15:43:19,430 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:19,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 15:43:19,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 15:43:19,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2018-11-23 15:43:19,431 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 19 states. [2018-11-23 15:43:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:19,885 INFO L93 Difference]: Finished difference Result 189 states and 313 transitions. [2018-11-23 15:43:19,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-23 15:43:19,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 313 [2018-11-23 15:43:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:19,887 INFO L225 Difference]: With dead ends: 189 [2018-11-23 15:43:19,888 INFO L226 Difference]: Without dead ends: 125 [2018-11-23 15:43:19,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 601 SyntacticMatches, 14 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 15:43:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-23 15:43:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2018-11-23 15:43:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-23 15:43:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 157 transitions. [2018-11-23 15:43:19,902 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 157 transitions. Word has length 313 [2018-11-23 15:43:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:19,902 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 157 transitions. [2018-11-23 15:43:19,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 15:43:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 157 transitions. [2018-11-23 15:43:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-11-23 15:43:19,907 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:19,907 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:19,907 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:19,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:19,907 INFO L82 PathProgramCache]: Analyzing trace with hash -768599631, now seen corresponding path program 8 times [2018-11-23 15:43:19,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:19,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:19,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:19,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:19,908 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-11-23 15:43:20,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:20,060 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:20,060 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:20,060 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:20,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:20,061 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:20,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:43:20,067 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:43:20,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-11-23 15:43:20,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:20,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1415 proven. 256 refuted. 0 times theorem prover too weak. 10716 trivial. 0 not checked. [2018-11-23 15:43:20,220 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1421 proven. 282 refuted. 0 times theorem prover too weak. 10684 trivial. 0 not checked. [2018-11-23 15:43:20,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:20,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 16 [2018-11-23 15:43:20,946 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:20,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 15:43:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 15:43:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-11-23 15:43:20,947 INFO L87 Difference]: Start difference. First operand 112 states and 157 transitions. Second operand 11 states. [2018-11-23 15:43:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:21,050 INFO L93 Difference]: Finished difference Result 125 states and 174 transitions. [2018-11-23 15:43:21,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 15:43:21,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 463 [2018-11-23 15:43:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:21,052 INFO L225 Difference]: With dead ends: 125 [2018-11-23 15:43:21,052 INFO L226 Difference]: Without dead ends: 118 [2018-11-23 15:43:21,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 947 GetRequests, 915 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2018-11-23 15:43:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-23 15:43:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2018-11-23 15:43:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-23 15:43:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 156 transitions. [2018-11-23 15:43:21,060 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 156 transitions. Word has length 463 [2018-11-23 15:43:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:21,061 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 156 transitions. [2018-11-23 15:43:21,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 15:43:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 156 transitions. [2018-11-23 15:43:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-11-23 15:43:21,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:21,064 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:21,064 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:21,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1052494023, now seen corresponding path program 9 times [2018-11-23 15:43:21,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:21,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:21,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:21,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:21,065 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-11-23 15:43:21,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:21,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:21,242 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:21,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:21,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:21,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:21,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 15:43:21,257 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 15:43:21,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 15:43:21,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:21,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-11-23 15:43:21,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 3019 refuted. 0 times theorem prover too weak. 15683 trivial. 0 not checked. [2018-11-23 15:43:23,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:23,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 19] total 20 [2018-11-23 15:43:23,107 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:23,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 15:43:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 15:43:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:43:23,108 INFO L87 Difference]: Start difference. First operand 112 states and 156 transitions. Second operand 12 states. [2018-11-23 15:43:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:23,219 INFO L93 Difference]: Finished difference Result 137 states and 205 transitions. [2018-11-23 15:43:23,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 15:43:23,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-11-23 15:43:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:23,221 INFO L225 Difference]: With dead ends: 137 [2018-11-23 15:43:23,221 INFO L226 Difference]: Without dead ends: 123 [2018-11-23 15:43:23,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1125 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2018-11-23 15:43:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-23 15:43:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2018-11-23 15:43:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-23 15:43:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 151 transitions. [2018-11-23 15:43:23,231 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 151 transitions. Word has length 572 [2018-11-23 15:43:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:23,232 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 151 transitions. [2018-11-23 15:43:23,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 15:43:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 151 transitions. [2018-11-23 15:43:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-11-23 15:43:23,237 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:23,237 INFO L402 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:23,237 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:23,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1213678472, now seen corresponding path program 10 times [2018-11-23 15:43:23,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:23,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:23,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:23,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:23,238 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3536 proven. 1905 refuted. 0 times theorem prover too weak. 38173 trivial. 0 not checked. [2018-11-23 15:43:23,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:23,714 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:23,715 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:23,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:23,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:23,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:23,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:23,721 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:43:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:23,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3546 proven. 1888 refuted. 0 times theorem prover too weak. 38180 trivial. 0 not checked. [2018-11-23 15:43:24,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3539 proven. 1965 refuted. 0 times theorem prover too weak. 38110 trivial. 0 not checked. [2018-11-23 15:43:26,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:26,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 20] total 25 [2018-11-23 15:43:26,461 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:26,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 15:43:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 15:43:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2018-11-23 15:43:26,462 INFO L87 Difference]: Start difference. First operand 110 states and 151 transitions. Second operand 16 states. [2018-11-23 15:43:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:26,610 INFO L93 Difference]: Finished difference Result 163 states and 266 transitions. [2018-11-23 15:43:26,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 15:43:26,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 858 [2018-11-23 15:43:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:26,613 INFO L225 Difference]: With dead ends: 163 [2018-11-23 15:43:26,613 INFO L226 Difference]: Without dead ends: 134 [2018-11-23 15:43:26,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1743 GetRequests, 1695 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2018-11-23 15:43:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-23 15:43:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-11-23 15:43:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-11-23 15:43:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 187 transitions. [2018-11-23 15:43:26,622 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 187 transitions. Word has length 858 [2018-11-23 15:43:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:26,623 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 187 transitions. [2018-11-23 15:43:26,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 15:43:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 187 transitions. [2018-11-23 15:43:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-11-23 15:43:26,626 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:26,626 INFO L402 BasicCegarLoop]: trace histogram [115, 115, 93, 57, 57, 57, 57, 57, 57, 57, 36, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:43:26,626 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:26,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash 464489697, now seen corresponding path program 11 times [2018-11-23 15:43:26,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:26,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:26,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:43:26,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:26,628 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36882 backedges. 954 proven. 4596 refuted. 0 times theorem prover too weak. 31332 trivial. 0 not checked. [2018-11-23 15:43:26,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:26,934 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:26,935 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:26,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:26,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:26,935 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:26,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:43:26,943 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:43:27,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-11-23 15:43:27,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:27,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36882 backedges. 970 proven. 4572 refuted. 0 times theorem prover too weak. 31340 trivial. 0 not checked. [2018-11-23 15:43:27,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36882 backedges. 962 proven. 4672 refuted. 0 times theorem prover too weak. 31248 trivial. 0 not checked. [2018-11-23 15:43:29,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:29,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 22] total 27 [2018-11-23 15:43:29,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:29,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 15:43:29,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 15:43:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2018-11-23 15:43:29,674 INFO L87 Difference]: Start difference. First operand 134 states and 187 transitions. Second operand 17 states. [2018-11-23 15:43:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:29,802 INFO L93 Difference]: Finished difference Result 183 states and 270 transitions. [2018-11-23 15:43:29,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 15:43:29,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 790 [2018-11-23 15:43:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:29,804 INFO L225 Difference]: With dead ends: 183 [2018-11-23 15:43:29,804 INFO L226 Difference]: Without dead ends: 108 [2018-11-23 15:43:29,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1557 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 15:43:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-11-23 15:43:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-11-23 15:43:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-11-23 15:43:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2018-11-23 15:43:29,812 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 790 [2018-11-23 15:43:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:29,812 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2018-11-23 15:43:29,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 15:43:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2018-11-23 15:43:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2018-11-23 15:43:29,816 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:43:29,816 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] [2018-11-23 15:43:29,816 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:43:29,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:43:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 12 times [2018-11-23 15:43:29,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:43:29,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:29,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:43:29,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:43:29,817 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:43:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:43:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 15:43:30,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:30,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:43:30,754 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:43:30,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:43:30,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:43:30,754 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/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 15:43:30,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 15:43:30,760 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 15:43:30,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 15:43:30,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:43:30,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:43:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 15:43:31,688 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:43:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 15:43:36,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:43:36,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-11-23 15:43:36,087 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:43:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 15:43:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 15:43:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 15:43:36,088 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand 36 states. [2018-11-23 15:43:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:43:36,358 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2018-11-23 15:43:36,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 15:43:36,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2018-11-23 15:43:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:43:36,358 INFO L225 Difference]: With dead ends: 108 [2018-11-23 15:43:36,359 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 15:43:36,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1718 GetRequests, 1574 SyntacticMatches, 110 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 15:43:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 15:43:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 15:43:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 15:43:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 15:43:36,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 749 [2018-11-23 15:43:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:43:36,360 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 15:43:36,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 15:43:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 15:43:36,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 15:43:36,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 15:43:36,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,465 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,468 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,470 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,471 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,473 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,482 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,491 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,515 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,540 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,544 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,551 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,557 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,559 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,563 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,592 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,599 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,626 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,631 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,638 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,639 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,657 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,661 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,669 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,685 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,686 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,729 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,733 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,740 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,742 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,766 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,768 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,774 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,776 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,798 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,802 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,861 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,869 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,888 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,890 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,921 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,946 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,948 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,951 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,978 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,984 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,990 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,993 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:36,996 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 15:43:37,705 WARN L180 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 63 [2018-11-23 15:43:37,707 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-23 15:43:37,707 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-23 15:43:37,707 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 15:43:37,707 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-23 15:43:37,708 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (or (not (= |fibonacci_#in~n| 9)) (and (<= |fibonacci_#t~ret0| 21) (<= 21 |fibonacci_#t~ret0|))) (let ((.cse0 (<= |fibonacci_#in~n| 4))) (or (and (<= 4 |fibonacci_#in~n|) .cse0) (and (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 3) (<= |fibonacci_#in~n| 5) (<= 5 fibonacci_~n)) (<= 7 |fibonacci_#in~n|) (and (<= 5 |fibonacci_#t~ret0|) (<= 6 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 5)) (and (<= |fibonacci_#t~ret0| 1) (<= 1 |fibonacci_#t~ret0|) .cse0))) (or (and (<= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 13)) (not (= |fibonacci_#in~n| 8))) (or (< 4 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| 3) (<= 3 fibonacci_~n)) (and (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n)) (and (<= |fibonacci_#t~ret0| 2) (<= 2 |fibonacci_#t~ret0|))) (or (and (<= |fibonacci_#t~ret0| 8) (<= 8 |fibonacci_#t~ret0|)) (<= 8 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 6)) (<= |fibonacci_#in~n| fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-23 15:43:37,708 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-23 15:43:37,708 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-23 15:43:37,708 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-23 15:43:37,708 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-23 15:43:37,708 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 15:43:37,708 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:43:37,712 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:43:37,712 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 15:43:37,712 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 15:43:37,712 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 15:43:37,712 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-23 15:43:37,713 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-23 15:43:37,713 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-23 15:43:37,713 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-23 15:43:37,713 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (= main_~x~0 9) [2018-11-23 15:43:37,713 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-23 15:43:37,713 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-23 15:43:37,713 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2018-11-23 15:43:37,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:43:37 BoogieIcfgContainer [2018-11-23 15:43:37,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 15:43:37,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 15:43:37,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 15:43:37,716 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 15:43:37,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:42:59" (3/4) ... [2018-11-23 15:43:37,719 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 15:43:37,723 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-23 15:43:37,723 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 15:43:37,724 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 15:43:37,727 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 15:43:37,727 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 15:43:37,727 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 15:43:37,758 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_14b3bd2c-2321-4ea8-9533-720480a05e42/bin-2019/utaipan/witness.graphml [2018-11-23 15:43:37,758 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 15:43:37,758 INFO L168 Benchmark]: Toolchain (without parser) took 38981.01 ms. Allocated memory was 1.0 GB in the beginning and 4.6 GB in the end (delta: 3.5 GB). Free memory was 961.8 MB in the beginning and 433.8 MB in the end (delta: 528.0 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. [2018-11-23 15:43:37,759 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:43:37,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.26 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 15:43:37,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.06 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:43:37,760 INFO L168 Benchmark]: Boogie Preprocessor took 10.74 ms. Allocated memory is still 1.0 GB. Free memory was 951.1 MB in the beginning and 945.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-23 15:43:37,760 INFO L168 Benchmark]: RCFGBuilder took 193.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -153.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-23 15:43:37,760 INFO L168 Benchmark]: TraceAbstraction took 38576.23 ms. Allocated memory was 1.1 GB in the beginning and 4.6 GB in the end (delta: 3.4 GB). Free memory was 1.1 GB in the beginning and 433.8 MB in the end (delta: 665.8 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. [2018-11-23 15:43:37,761 INFO L168 Benchmark]: Witness Printer took 42.44 ms. Allocated memory is still 4.6 GB. Free memory is still 433.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:43:37,762 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.26 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 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 12.06 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.74 ms. Allocated memory is still 1.0 GB. Free memory was 951.1 MB in the beginning and 945.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 193.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -153.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38576.23 ms. Allocated memory was 1.1 GB in the beginning and 4.6 GB in the end (delta: 3.4 GB). Free memory was 1.1 GB in the beginning and 433.8 MB in the end (delta: 665.8 MB). Peak memory consumption was 4.1 GB. Max. memory is 11.5 GB. * Witness Printer took 42.44 ms. Allocated memory is still 4.6 GB. Free memory is still 433.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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, 23 locations, 1 error locations. SAFE Result, 38.5s OverallTime, 16 OverallIterations, 125 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 1.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 383 SDtfs, 587 SDslu, 2111 SDs, 0 SdLazy, 2402 SolverSat, 628 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 9551 GetRequests, 8956 SyntacticMatches, 245 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.2s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.84 AbsIntWeakeningRatio, 0.56 AbsIntAvgWeakeningVarsNumRemoved, 0.16 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 114 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 230 PreInvPairs, 593 NumberOfFragments, 133 HoareAnnotationTreeSize, 230 FomulaSimplifications, 128003 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6279 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 9091 NumberOfCodeBlocks, 8055 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 13568 ConstructedInterpolants, 0 QuantifiedInterpolants, 15327028 SizeOfPredicates, 77 NumberOfNonLiveVariables, 7640 ConjunctsInSsa, 593 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 401536/470088 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...