./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/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 dd317ac0ecdb37853dacea373914a521115465e0 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 17:47:42,626 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 17:47:42,627 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 17:47:42,635 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 17:47:42,636 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 17:47:42,636 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 17:47:42,637 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 17:47:42,638 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 17:47:42,638 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 17:47:42,639 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 17:47:42,639 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 17:47:42,639 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 17:47:42,640 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 17:47:42,640 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 17:47:42,641 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 17:47:42,641 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 17:47:42,641 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 17:47:42,643 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 17:47:42,644 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 17:47:42,644 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 17:47:42,645 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 17:47:42,646 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 17:47:42,648 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 17:47:42,648 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 17:47:42,648 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 17:47:42,649 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 17:47:42,649 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 17:47:42,649 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 17:47:42,650 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 17:47:42,650 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 17:47:42,650 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 17:47:42,651 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 17:47:42,651 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 17:47:42,651 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 17:47:42,651 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 17:47:42,652 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 17:47:42,652 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 17:47:42,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 17:47:42,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 17:47:42,663 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 17:47:42,663 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 17:47:42,663 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 17:47:42,663 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 17:47:42,663 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 17:47:42,663 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 17:47:42,664 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 17:47:42,664 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 17:47:42,664 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 17:47:42,664 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 17:47:42,664 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 17:47:42,665 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 17:47:42,665 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 17:47:42,665 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 17:47:42,665 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 17:47:42,665 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 17:47:42,666 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 17:47:42,666 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 17:47:42,666 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 17:47:42,666 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 17:47:42,666 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 17:47:42,666 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 17:47:42,666 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 17:47:42,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 17:47:42,667 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 17:47:42,667 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 17:47:42,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 17:47:42,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 17:47:42,667 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 17:47:42,668 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 17:47:42,668 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 17:47:42,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 17:47:42,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 17:47:42,668 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 17:47:42,668 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_8e576f0d-ac16-4747-8b6d-fdcbff96b700/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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-12-09 17:47:42,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 17:47:42,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 17:47:42,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 17:47:42,701 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 17:47:42,701 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 17:47:42,702 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-09 17:47:42,738 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/data/ef33a1eae/693fb8b9d3774c5cb76d04ffd31d1134/FLAGe7aa077b6 [2018-12-09 17:47:43,129 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 17:47:43,130 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-12-09 17:47:43,133 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/data/ef33a1eae/693fb8b9d3774c5cb76d04ffd31d1134/FLAGe7aa077b6 [2018-12-09 17:47:43,141 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/data/ef33a1eae/693fb8b9d3774c5cb76d04ffd31d1134 [2018-12-09 17:47:43,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 17:47:43,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 17:47:43,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 17:47:43,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 17:47:43,147 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 17:47:43,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42aec683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43, skipping insertion in model container [2018-12-09 17:47:43,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 17:47:43,162 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 17:47:43,244 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 17:47:43,246 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 17:47:43,254 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 17:47:43,263 INFO L195 MainTranslator]: Completed translation [2018-12-09 17:47:43,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43 WrapperNode [2018-12-09 17:47:43,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 17:47:43,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 17:47:43,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 17:47:43,264 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 17:47:43,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 17:47:43,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 17:47:43,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 17:47:43,275 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 17:47:43,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... [2018-12-09 17:47:43,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 17:47:43,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 17:47:43,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 17:47:43,286 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 17:47:43,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 17:47:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 17:47:43,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 17:47:43,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 17:47:43,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 17:47:43,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 17:47:43,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 17:47:43,354 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-09 17:47:43,354 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-09 17:47:43,438 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 17:47:43,438 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 17:47:43,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:47:43 BoogieIcfgContainer [2018-12-09 17:47:43,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 17:47:43,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 17:47:43,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 17:47:43,440 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 17:47:43,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:47:43" (1/3) ... [2018-12-09 17:47:43,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a95d560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:47:43, skipping insertion in model container [2018-12-09 17:47:43,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:47:43" (2/3) ... [2018-12-09 17:47:43,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a95d560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:47:43, skipping insertion in model container [2018-12-09 17:47:43,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:47:43" (3/3) ... [2018-12-09 17:47:43,442 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-12-09 17:47:43,448 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 17:47:43,452 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 17:47:43,460 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 17:47:43,477 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 17:47:43,477 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 17:47:43,477 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 17:47:43,477 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 17:47:43,477 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 17:47:43,477 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 17:47:43,478 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 17:47:43,478 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 17:47:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-09 17:47:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 17:47:43,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:47:43,491 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:47:43,492 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:47:43,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:47:43,495 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-12-09 17:47:43,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:47:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:43,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:47:43,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:43,523 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:47:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:47:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:47:43,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:47:43,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 17:47:43,583 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:47:43,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 17:47:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 17:47:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 17:47:43,595 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-09 17:47:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:47:43,643 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-12-09 17:47:43,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 17:47:43,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 17:47:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:47:43,650 INFO L225 Difference]: With dead ends: 35 [2018-12-09 17:47:43,650 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 17:47:43,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 17:47:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 17:47:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-09 17:47:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 17:47:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-09 17:47:43,676 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-12-09 17:47:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:47:43,676 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-09 17:47:43,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 17:47:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-09 17:47:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 17:47:43,677 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:47:43,677 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:47:43,677 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:47:43,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:47:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-12-09 17:47:43,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:47:43,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:43,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:47:43,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:43,679 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:47:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:47:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 17:47:43,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 17:47:43,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 17:47:43,705 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 17:47:43,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 17:47:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 17:47:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 17:47:43,706 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-12-09 17:47:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:47:43,740 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-09 17:47:43,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 17:47:43,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-09 17:47:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:47:43,741 INFO L225 Difference]: With dead ends: 27 [2018-12-09 17:47:43,741 INFO L226 Difference]: Without dead ends: 23 [2018-12-09 17:47:43,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 17:47:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-09 17:47:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-09 17:47:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 17:47:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-09 17:47:43,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-12-09 17:47:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:47:43,746 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-09 17:47:43,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 17:47:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-09 17:47:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-09 17:47:43,747 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:47:43,747 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] [2018-12-09 17:47:43,747 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:47:43,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:47:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-12-09 17:47:43,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:47:43,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:43,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:47:43,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:43,749 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:47:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:47:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 17:47:43,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:47:43,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:47:43,803 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-09 17:47:43,805 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2018-12-09 17:47:43,824 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:47:43,824 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:47:44,362 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:47:44,364 INFO L272 AbstractInterpreter]: Visited 21 different actions 2220 times. Never merged. Widened at 2 different actions 200 times. Performed 4734 root evaluator evaluations with a maximum evaluation depth of 4. Performed 4734 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 220 fixpoints after 3 different actions. Largest state had 5 variables. [2018-12-09 17:47:44,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:47:44,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:47:44,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:47:44,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:47:44,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:47:44,386 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:47:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:47:44,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:47:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 17:47:44,454 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:47:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 17:47:44,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:47:44,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2018-12-09 17:47:44,589 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:47:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 17:47:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 17:47:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:47:44,590 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-12-09 17:47:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:47:44,662 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-12-09 17:47:44,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 17:47:44,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-12-09 17:47:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:47:44,663 INFO L225 Difference]: With dead ends: 38 [2018-12-09 17:47:44,663 INFO L226 Difference]: Without dead ends: 23 [2018-12-09 17:47:44,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-12-09 17:47:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-09 17:47:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-09 17:47:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-09 17:47:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-09 17:47:44,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-12-09 17:47:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:47:44,667 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-09 17:47:44,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 17:47:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-09 17:47:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 17:47:44,668 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:47:44,668 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:47:44,668 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:47:44,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:47:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-12-09 17:47:44,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:47:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:44,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:47:44,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:47:44,669 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:47:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:47:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 17:47:44,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:47:44,697 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:47:44,697 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-12-09 17:47:44,697 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2018-12-09 17:47:44,698 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 17:47:44,698 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 17:48:10,515 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 17:48:10,515 INFO L272 AbstractInterpreter]: Visited 22 different actions 325228 times. Merged at 10 different actions 104980 times. Widened at 2 different actions 20972 times. Performed 826146 root evaluator evaluations with a maximum evaluation depth of 4. Performed 826146 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 44468 fixpoints after 5 different actions. Largest state had 5 variables. [2018-12-09 17:48:10,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:10,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 17:48:10,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:10,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:10,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:10,524 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:48:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:10,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 17:48:10,539 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 17:48:10,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:10,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-12-09 17:48:10,645 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:10,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 17:48:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 17:48:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-09 17:48:10,646 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-12-09 17:48:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:10,679 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-12-09 17:48:10,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 17:48:10,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-09 17:48:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:10,681 INFO L225 Difference]: With dead ends: 32 [2018-12-09 17:48:10,681 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 17:48:10,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:48:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 17:48:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-09 17:48:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 17:48:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-12-09 17:48:10,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-12-09 17:48:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:10,685 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-12-09 17:48:10,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 17:48:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-12-09 17:48:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 17:48:10,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:10,686 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:10,687 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:10,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:10,687 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-12-09 17:48:10,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:10,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:10,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:10,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:10,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-09 17:48:10,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:10,720 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:10,720 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:10,720 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:10,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:10,720 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:10,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:48:10,726 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:48:10,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 17:48:10,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:10,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-09 17:48:10,743 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 17:48:10,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:10,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-12-09 17:48:10,869 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:10,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 17:48:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 17:48:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-09 17:48:10,869 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 6 states. [2018-12-09 17:48:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:10,908 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2018-12-09 17:48:10,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 17:48:10,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-12-09 17:48:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:10,909 INFO L225 Difference]: With dead ends: 38 [2018-12-09 17:48:10,909 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 17:48:10,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:48:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 17:48:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2018-12-09 17:48:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 17:48:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-12-09 17:48:10,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 40 [2018-12-09 17:48:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:10,913 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-12-09 17:48:10,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 17:48:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-12-09 17:48:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 17:48:10,914 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:10,914 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] [2018-12-09 17:48:10,914 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:10,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2018-12-09 17:48:10,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:10,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:10,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:10,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:10,915 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 17:48:10,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:10,943 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:10,943 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:10,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:10,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:10,944 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:11,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:48:11,147 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:48:11,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:48:11,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:11,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-09 17:48:11,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-09 17:48:11,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:11,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 11 [2018-12-09 17:48:11,314 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:11,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 17:48:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 17:48:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-09 17:48:11,315 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 7 states. [2018-12-09 17:48:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:11,360 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2018-12-09 17:48:11,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 17:48:11,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-12-09 17:48:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:11,362 INFO L225 Difference]: With dead ends: 40 [2018-12-09 17:48:11,362 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 17:48:11,362 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 [2018-12-09 17:48:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 17:48:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-12-09 17:48:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 17:48:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-12-09 17:48:11,366 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 41 [2018-12-09 17:48:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:11,367 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-12-09 17:48:11,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 17:48:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-12-09 17:48:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-09 17:48:11,368 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:11,368 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] [2018-12-09 17:48:11,368 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:11,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1437629917, now seen corresponding path program 4 times [2018-12-09 17:48:11,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:11,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:11,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:11,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:11,369 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-12-09 17:48:11,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:11,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:11,436 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:11,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:11,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:11,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:11,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:11,442 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:48:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:11,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-12-09 17:48:11,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-12-09 17:48:11,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:11,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 19 [2018-12-09 17:48:11,777 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:11,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 17:48:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 17:48:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-12-09 17:48:11,778 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 14 states. [2018-12-09 17:48:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:11,998 INFO L93 Difference]: Finished difference Result 80 states and 137 transitions. [2018-12-09 17:48:11,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-09 17:48:11,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-12-09 17:48:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:11,999 INFO L225 Difference]: With dead ends: 80 [2018-12-09 17:48:11,999 INFO L226 Difference]: Without dead ends: 53 [2018-12-09 17:48:12,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2018-12-09 17:48:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-09 17:48:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-12-09 17:48:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-09 17:48:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2018-12-09 17:48:12,005 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 67 [2018-12-09 17:48:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:12,005 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2018-12-09 17:48:12,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 17:48:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2018-12-09 17:48:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-09 17:48:12,007 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:12,007 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] [2018-12-09 17:48:12,007 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:12,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2018-12-09 17:48:12,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:12,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:12,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:12,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:12,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-12-09 17:48:12,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:12,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:12,059 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:12,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:12,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:12,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:12,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:48:12,065 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:48:12,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-09 17:48:12,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:12,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 41 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-12-09 17:48:12,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 50 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-12-09 17:48:12,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:12,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2018-12-09 17:48:12,285 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:12,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 17:48:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 17:48:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-12-09 17:48:12,286 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 8 states. [2018-12-09 17:48:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:12,340 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2018-12-09 17:48:12,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 17:48:12,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2018-12-09 17:48:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:12,342 INFO L225 Difference]: With dead ends: 58 [2018-12-09 17:48:12,342 INFO L226 Difference]: Without dead ends: 54 [2018-12-09 17:48:12,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2018-12-09 17:48:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-09 17:48:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2018-12-09 17:48:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-09 17:48:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2018-12-09 17:48:12,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 109 [2018-12-09 17:48:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:12,348 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2018-12-09 17:48:12,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 17:48:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2018-12-09 17:48:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-09 17:48:12,350 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:12,350 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:12,350 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:12,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:12,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 6 times [2018-12-09 17:48:12,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:12,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:12,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:12,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:12,351 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-12-09 17:48:12,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:12,423 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:12,423 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:12,423 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:12,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:12,423 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:12,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:48:12,429 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:48:12,450 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:48:12,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:12,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 326 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-12-09 17:48:12,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 52 proven. 352 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-12-09 17:48:12,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:12,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 15 [2018-12-09 17:48:12,918 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:12,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 17:48:12,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 17:48:12,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-12-09 17:48:12,919 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 9 states. [2018-12-09 17:48:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:12,977 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2018-12-09 17:48:12,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 17:48:12,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 136 [2018-12-09 17:48:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:12,978 INFO L225 Difference]: With dead ends: 63 [2018-12-09 17:48:12,979 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 17:48:12,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 259 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-12-09 17:48:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 17:48:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2018-12-09 17:48:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 17:48:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2018-12-09 17:48:12,985 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 136 [2018-12-09 17:48:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:12,986 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2018-12-09 17:48:12,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 17:48:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2018-12-09 17:48:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-12-09 17:48:12,988 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:12,988 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:12,989 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:12,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1101007572, now seen corresponding path program 7 times [2018-12-09 17:48:12,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:12,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:12,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:12,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:12,990 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 445 proven. 519 refuted. 0 times theorem prover too weak. 4083 trivial. 0 not checked. [2018-12-09 17:48:13,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:13,114 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:13,114 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:13,114 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:13,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:13,114 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:13,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:13,120 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:48:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:13,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2018-12-09 17:48:13,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2018-12-09 17:48:14,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:14,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 24 [2018-12-09 17:48:14,011 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:14,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 17:48:14,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 17:48:14,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2018-12-09 17:48:14,012 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand 17 states. [2018-12-09 17:48:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:14,344 INFO L93 Difference]: Finished difference Result 132 states and 245 transitions. [2018-12-09 17:48:14,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-09 17:48:14,344 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2018-12-09 17:48:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:14,345 INFO L225 Difference]: With dead ends: 132 [2018-12-09 17:48:14,345 INFO L226 Difference]: Without dead ends: 82 [2018-12-09 17:48:14,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 576 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2018-12-09 17:48:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-09 17:48:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2018-12-09 17:48:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-09 17:48:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2018-12-09 17:48:14,353 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 300 [2018-12-09 17:48:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:14,353 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2018-12-09 17:48:14,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 17:48:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2018-12-09 17:48:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-12-09 17:48:14,357 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:14,358 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:14,358 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:14,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash 223191898, now seen corresponding path program 8 times [2018-12-09 17:48:14,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:14,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:14,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:14,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:14,359 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 248 proven. 1232 refuted. 0 times theorem prover too weak. 5640 trivial. 0 not checked. [2018-12-09 17:48:14,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:14,462 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:14,462 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:14,462 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:14,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:14,462 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:14,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:48:14,468 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:48:14,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-12-09 17:48:14,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:14,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1019 proven. 219 refuted. 0 times theorem prover too weak. 5882 trivial. 0 not checked. [2018-12-09 17:48:14,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1025 proven. 245 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2018-12-09 17:48:15,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:15,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2018-12-09 17:48:15,224 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:15,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 17:48:15,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 17:48:15,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2018-12-09 17:48:15,225 INFO L87 Difference]: Start difference. First operand 78 states and 106 transitions. Second operand 12 states. [2018-12-09 17:48:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:15,328 INFO L93 Difference]: Finished difference Result 92 states and 141 transitions. [2018-12-09 17:48:15,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 17:48:15,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 354 [2018-12-09 17:48:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:15,330 INFO L225 Difference]: With dead ends: 92 [2018-12-09 17:48:15,331 INFO L226 Difference]: Without dead ends: 88 [2018-12-09 17:48:15,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 696 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2018-12-09 17:48:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-09 17:48:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-12-09 17:48:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-12-09 17:48:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2018-12-09 17:48:15,340 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 354 [2018-12-09 17:48:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:15,340 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2018-12-09 17:48:15,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 17:48:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2018-12-09 17:48:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2018-12-09 17:48:15,344 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:15,344 INFO L402 BasicCegarLoop]: trace histogram [147, 147, 119, 73, 73, 73, 73, 73, 73, 73, 46, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:15,344 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:15,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash -70129236, now seen corresponding path program 9 times [2018-12-09 17:48:15,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:15,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:15,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:15,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:15,345 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 2173 proven. 5015 refuted. 0 times theorem prover too weak. 53269 trivial. 0 not checked. [2018-12-09 17:48:15,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:15,963 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:15,963 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:15,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:15,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:15,963 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:15,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:48:15,969 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:48:16,088 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:48:16,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:16,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 796 proven. 6156 refuted. 0 times theorem prover too weak. 53505 trivial. 0 not checked. [2018-12-09 17:48:16,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 60457 backedges. 796 proven. 6256 refuted. 0 times theorem prover too weak. 53405 trivial. 0 not checked. [2018-12-09 17:48:18,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:18,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 21] total 31 [2018-12-09 17:48:18,948 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:18,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 17:48:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 17:48:18,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2018-12-09 17:48:18,949 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 22 states. [2018-12-09 17:48:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:19,652 INFO L93 Difference]: Finished difference Result 228 states and 508 transitions. [2018-12-09 17:48:19,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-09 17:48:19,653 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1008 [2018-12-09 17:48:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:19,654 INFO L225 Difference]: With dead ends: 228 [2018-12-09 17:48:19,654 INFO L226 Difference]: Without dead ends: 150 [2018-12-09 17:48:19,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 1986 SyntacticMatches, 19 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1342, Invalid=4208, Unknown=0, NotChecked=0, Total=5550 [2018-12-09 17:48:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-12-09 17:48:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2018-12-09 17:48:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-12-09 17:48:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 218 transitions. [2018-12-09 17:48:19,664 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 218 transitions. Word has length 1008 [2018-12-09 17:48:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:19,664 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 218 transitions. [2018-12-09 17:48:19,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 17:48:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 218 transitions. [2018-12-09 17:48:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-12-09 17:48:19,670 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:19,671 INFO L402 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:19,671 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:19,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 10 times [2018-12-09 17:48:19,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:19,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:19,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:19,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:19,672 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-09 17:48:21,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:21,009 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:21,009 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:21,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:21,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:21,009 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:21,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:21,015 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 17:48:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:21,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-09 17:48:22,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-12-09 17:48:30,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:30,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 40 [2018-12-09 17:48:30,429 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:30,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-09 17:48:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-09 17:48:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 17:48:30,431 INFO L87 Difference]: Start difference. First operand 140 states and 218 transitions. Second operand 40 states. [2018-12-09 17:48:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:30,889 INFO L93 Difference]: Finished difference Result 178 states and 296 transitions. [2018-12-09 17:48:30,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-09 17:48:30,890 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-12-09 17:48:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:30,906 INFO L225 Difference]: With dead ends: 178 [2018-12-09 17:48:30,906 INFO L226 Difference]: Without dead ends: 174 [2018-12-09 17:48:30,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2780 GetRequests, 2562 SyntacticMatches, 180 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 17:48:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-12-09 17:48:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2018-12-09 17:48:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-12-09 17:48:30,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 273 transitions. [2018-12-09 17:48:30,918 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 273 transitions. Word has length 1212 [2018-12-09 17:48:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:30,920 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 273 transitions. [2018-12-09 17:48:30,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-09 17:48:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 273 transitions. [2018-12-09 17:48:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2018-12-09 17:48:30,930 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:30,931 INFO L402 BasicCegarLoop]: trace histogram [187, 187, 151, 93, 93, 93, 93, 93, 93, 93, 58, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:30,931 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:30,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash 789564882, now seen corresponding path program 11 times [2018-12-09 17:48:30,931 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:30,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:30,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 17:48:30,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:30,932 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 6274 proven. 3038 refuted. 0 times theorem prover too weak. 88689 trivial. 0 not checked. [2018-12-09 17:48:31,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:31,470 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:31,470 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:31,470 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:31,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:31,470 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:31,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 17:48:31,476 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 17:48:31,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-12-09 17:48:31,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:31,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 39139 proven. 296 refuted. 0 times theorem prover too weak. 58566 trivial. 0 not checked. [2018-12-09 17:48:32,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 98001 backedges. 6910 proven. 2020 refuted. 0 times theorem prover too weak. 89071 trivial. 0 not checked. [2018-12-09 17:48:34,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:34,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 29 [2018-12-09 17:48:34,387 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:34,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 17:48:34,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 17:48:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2018-12-09 17:48:34,388 INFO L87 Difference]: Start difference. First operand 160 states and 273 transitions. Second operand 22 states. [2018-12-09 17:48:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:34,829 INFO L93 Difference]: Finished difference Result 345 states and 751 transitions. [2018-12-09 17:48:34,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-09 17:48:34,829 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1280 [2018-12-09 17:48:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:34,832 INFO L225 Difference]: With dead ends: 345 [2018-12-09 17:48:34,832 INFO L226 Difference]: Without dead ends: 171 [2018-12-09 17:48:34,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2600 GetRequests, 2540 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2018-12-09 17:48:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-12-09 17:48:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2018-12-09 17:48:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-12-09 17:48:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 169 transitions. [2018-12-09 17:48:34,840 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 169 transitions. Word has length 1280 [2018-12-09 17:48:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:34,841 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 169 transitions. [2018-12-09 17:48:34,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 17:48:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 169 transitions. [2018-12-09 17:48:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1499 [2018-12-09 17:48:34,849 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 17:48:34,849 INFO L402 BasicCegarLoop]: trace histogram [219, 219, 177, 109, 109, 109, 109, 109, 109, 109, 68, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 17:48:34,849 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 17:48:34,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 17:48:34,850 INFO L82 PathProgramCache]: Analyzing trace with hash -918806966, now seen corresponding path program 12 times [2018-12-09 17:48:34,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 17:48:34,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:34,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 17:48:34,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 17:48:34,851 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 17:48:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 17:48:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 1982 proven. 10170 refuted. 0 times theorem prover too weak. 122452 trivial. 0 not checked. [2018-12-09 17:48:35,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:35,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 17:48:35,585 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 17:48:35,585 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 17:48:35,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 17:48:35,585 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 17:48:35,591 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 17:48:35,591 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 17:48:35,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 17:48:35,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 17:48:35,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 17:48:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 2000 proven. 10143 refuted. 0 times theorem prover too weak. 122461 trivial. 0 not checked. [2018-12-09 17:48:36,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 17:48:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 1991 proven. 10269 refuted. 0 times theorem prover too weak. 122344 trivial. 0 not checked. [2018-12-09 17:48:40,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 17:48:40,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 24] total 29 [2018-12-09 17:48:40,293 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 17:48:40,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 17:48:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 17:48:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2018-12-09 17:48:40,294 INFO L87 Difference]: Start difference. First operand 132 states and 169 transitions. Second operand 18 states. [2018-12-09 17:48:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 17:48:40,422 INFO L93 Difference]: Finished difference Result 135 states and 175 transitions. [2018-12-09 17:48:40,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 17:48:40,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1498 [2018-12-09 17:48:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 17:48:40,423 INFO L225 Difference]: With dead ends: 135 [2018-12-09 17:48:40,423 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 17:48:40,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3029 GetRequests, 2971 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=481, Invalid=925, Unknown=0, NotChecked=0, Total=1406 [2018-12-09 17:48:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 17:48:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 17:48:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 17:48:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 17:48:40,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1498 [2018-12-09 17:48:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 17:48:40,424 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 17:48:40,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 17:48:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 17:48:40,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 17:48:40,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 17:48:40,951 WARN L180 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 70 [2018-12-09 17:48:41,048 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 17:48:41,048 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-12-09 17:48:41,048 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-12-09 17:48:41,049 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-12-09 17:48:41,049 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-09 17:48:41,049 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= fibo_~n |fibo_#in~n|)) (.cse2 (<= |fibo_#t~ret0| 1)) (.cse3 (<= 1 |fibo_#t~ret0|))) (and (let ((.cse1 (<= |fibo_#in~n| fibo_~n))) (or (and (<= 5 |fibo_#in~n|) .cse0 (<= 3 |fibo_#t~ret0|) .cse1 (<= |fibo_#t~ret0| 3) (<= |fibo_#in~n| 5)) (< |fibo_#in~n| 3) (and (<= 9 |fibo_#in~n|) .cse0 .cse1) (and (<= 4 |fibo_#in~n|) (<= |fibo_#in~n| 4) .cse0 .cse1 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and (<= |fibo_#t~ret0| 8) .cse0 (<= 8 |fibo_#t~ret0|) (<= |fibo_#in~n| 7) (<= 7 fibo_~n)) (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) .cse0 .cse1 (<= 5 |fibo_#t~ret0|) (<= 6 |fibo_#in~n|)) (and .cse0 .cse2 (<= |fibo_#in~n| 3) .cse3 (<= 3 fibo_~n)) (and (<= 13 |fibo_#t~ret0|) (<= 8 |fibo_#in~n|) .cse0 .cse1 (<= |fibo_#t~ret0| 13)))) (or (< 2 |fibo_#in~n|) (and .cse0 .cse2 .cse3 (< 1 fibo_~n))) (or (<= 11 |fibo_#in~n|) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|) (<= |fibo_#in~n| 9)) (<= |fibo_#in~n| 8) (and (<= 10 |fibo_#in~n|) (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))))) [2018-12-09 17:48:41,049 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-12-09 17:48:41,049 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-12-09 17:48:41,049 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-12-09 17:48:41,049 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-12-09 17:48:41,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:48:41 BoogieIcfgContainer [2018-12-09 17:48:41,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 17:48:41,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 17:48:41,051 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 17:48:41,051 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 17:48:41,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:47:43" (3/4) ... [2018-12-09 17:48:41,054 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 17:48:41,057 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 17:48:41,058 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 17:48:41,058 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-12-09 17:48:41,061 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 17:48:41,061 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 17:48:41,061 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 17:48:41,087 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e576f0d-ac16-4747-8b6d-fdcbff96b700/bin-2019/utaipan/witness.graphml [2018-12-09 17:48:41,088 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 17:48:41,088 INFO L168 Benchmark]: Toolchain (without parser) took 57944.64 ms. Allocated memory was 1.0 GB in the beginning and 6.0 GB in the end (delta: 5.0 GB). Free memory was 952.4 MB in the beginning and 2.5 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.4 GB. Max. memory is 11.5 GB. [2018-12-09 17:48:41,089 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:48:41,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 118.67 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 17:48:41,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.58 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:48:41,089 INFO L168 Benchmark]: Boogie Preprocessor took 10.52 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:48:41,089 INFO L168 Benchmark]: RCFGBuilder took 152.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 17:48:41,090 INFO L168 Benchmark]: TraceAbstraction took 57612.14 ms. Allocated memory was 1.2 GB in the beginning and 6.0 GB in the end (delta: 4.9 GB). Free memory was 1.1 GB in the beginning and 2.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. [2018-12-09 17:48:41,090 INFO L168 Benchmark]: Witness Printer took 36.69 ms. Allocated memory is still 6.0 GB. Free memory is still 2.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 17:48:41,092 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 118.67 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.58 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.52 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 152.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 57612.14 ms. Allocated memory was 1.2 GB in the beginning and 6.0 GB in the end (delta: 4.9 GB). Free memory was 1.1 GB in the beginning and 2.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.5 GB. Max. memory is 11.5 GB. * Witness Printer took 36.69 ms. Allocated memory is still 6.0 GB. Free memory is still 2.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 57.5s OverallTime, 15 OverallIterations, 219 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 399 SDtfs, 730 SDslu, 2585 SDs, 0 SdLazy, 3424 SolverSat, 1006 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12841 GetRequests, 12168 SyntacticMatches, 301 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3637 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 26.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 86 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 257 PreInvPairs, 431 NumberOfFragments, 188 HoareAnnotationTreeSize, 257 FomulaSimplifications, 1746 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4138 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 23.7s InterpolantComputationTime, 12223 NumberOfCodeBlocks, 10948 NumberOfCodeBlocksAsserted, 129 NumberOfCheckSat, 18280 ConstructedInterpolants, 0 QuantifiedInterpolants, 37187051 SizeOfPredicates, 72 NumberOfNonLiveVariables, 10414 ConjunctsInSsa, 852 ConjunctsInUnsatCore, 41 InterpolantComputations, 2 PerfectInterpolantSequences, 1038496/1184418 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...