./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:14:49,292 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:14:49,294 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:14:49,302 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:14:49,302 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:14:49,303 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:14:49,304 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:14:49,306 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:14:49,307 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:14:49,308 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:14:49,309 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:14:49,309 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:14:49,310 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:14:49,310 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:14:49,311 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:14:49,312 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:14:49,313 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:14:49,314 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:14:49,316 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:14:49,317 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:14:49,318 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:14:49,319 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:14:49,320 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:14:49,321 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:14:49,321 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:14:49,322 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:14:49,322 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:14:49,323 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:14:49,324 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:14:49,325 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:14:49,325 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:14:49,325 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:14:49,326 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:14:49,326 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:14:49,327 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:14:49,327 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:14:49,327 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2018-11-28 12:14:49,339 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:14:49,339 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:14:49,340 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:14:49,340 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:14:49,340 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:14:49,340 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:14:49,340 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:14:49,341 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:14:49,341 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:14:49,341 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 12:14:49,341 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-28 12:14:49,342 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:14:49,343 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:14:49,343 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:14:49,343 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:14:49,344 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:14:49,344 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:14:49,344 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:14:49,344 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:14:49,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:14:49,344 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer 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 ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-28 12:14:49,373 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:14:49,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:14:49,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:14:49,385 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:14:49,386 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:14:49,386 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:14:49,430 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/data/661ede2e5/c7d0a948a4514369ab1f3ff57c07dad8/FLAGcb1a7b12f [2018-11-28 12:14:49,835 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:14:49,836 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:14:49,839 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/data/661ede2e5/c7d0a948a4514369ab1f3ff57c07dad8/FLAGcb1a7b12f [2018-11-28 12:14:49,849 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/data/661ede2e5/c7d0a948a4514369ab1f3ff57c07dad8 [2018-11-28 12:14:49,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:14:49,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:14:49,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:14:49,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:14:49,855 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:14:49,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:49,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28035eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49, skipping insertion in model container [2018-11-28 12:14:49,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:49,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:14:49,873 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:14:49,971 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:14:49,973 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:14:49,982 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:14:49,991 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:14:49,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49 WrapperNode [2018-11-28 12:14:49,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:14:49,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:14:49,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:14:49,992 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:14:49,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:14:50,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:14:50,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:14:50,011 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:14:50,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... [2018-11-28 12:14:50,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:14:50,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:14:50,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:14:50,026 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:14:50,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:14:50,114 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-28 12:14:50,115 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-28 12:14:50,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:14:50,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:14:50,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:14:50,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:14:50,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:14:50,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:14:50,271 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:14:50,271 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 12:14:50,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:14:50 BoogieIcfgContainer [2018-11-28 12:14:50,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:14:50,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:14:50,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:14:50,274 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:14:50,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:14:49" (1/3) ... [2018-11-28 12:14:50,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb99b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:14:50, skipping insertion in model container [2018-11-28 12:14:50,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:14:49" (2/3) ... [2018-11-28 12:14:50,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb99b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:14:50, skipping insertion in model container [2018-11-28 12:14:50,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:14:50" (3/3) ... [2018-11-28 12:14:50,277 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:14:50,283 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:14:50,290 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-28 12:14:50,307 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-28 12:14:50,337 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:14:50,338 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:14:50,338 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:14:50,338 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:14:50,338 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:14:50,338 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:14:50,338 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:14:50,338 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:14:50,339 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:14:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-28 12:14:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 12:14:50,362 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:50,362 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:50,364 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:50,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1707029017, now seen corresponding path program 1 times [2018-11-28 12:14:50,375 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:50,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:50,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:50,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:50,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:14:50,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:14:50,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:14:50,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:14:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:14:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:14:50,562 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2018-11-28 12:14:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:50,655 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-28 12:14:50,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:14:50,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-28 12:14:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:50,662 INFO L225 Difference]: With dead ends: 38 [2018-11-28 12:14:50,662 INFO L226 Difference]: Without dead ends: 25 [2018-11-28 12:14:50,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:14:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-28 12:14:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-28 12:14:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-28 12:14:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-11-28 12:14:50,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-11-28 12:14:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:50,698 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-11-28 12:14:50,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:14:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-11-28 12:14:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-28 12:14:50,699 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:50,699 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:50,699 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:50,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1378291933, now seen corresponding path program 1 times [2018-11-28 12:14:50,700 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:50,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:50,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:50,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:50,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:14:50,728 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:14:50,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 12:14:50,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 12:14:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 12:14:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:14:50,731 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2018-11-28 12:14:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:50,764 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-11-28 12:14:50,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 12:14:50,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-28 12:14:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:50,766 INFO L225 Difference]: With dead ends: 27 [2018-11-28 12:14:50,766 INFO L226 Difference]: Without dead ends: 25 [2018-11-28 12:14:50,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:14:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-28 12:14:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-28 12:14:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 12:14:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-28 12:14:50,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2018-11-28 12:14:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:50,773 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-28 12:14:50,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 12:14:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-28 12:14:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-28 12:14:50,774 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:50,774 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:50,775 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:50,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash -995069271, now seen corresponding path program 1 times [2018-11-28 12:14:50,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:50,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:50,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:50,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:50,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-28 12:14:50,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:50,864 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:50,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:50,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:14:51,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:51,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2018-11-28 12:14:51,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:14:51,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:14:51,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:14:51,020 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2018-11-28 12:14:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:51,224 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2018-11-28 12:14:51,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:14:51,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-11-28 12:14:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:51,225 INFO L225 Difference]: With dead ends: 78 [2018-11-28 12:14:51,225 INFO L226 Difference]: Without dead ends: 59 [2018-11-28 12:14:51,227 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:14:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-28 12:14:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2018-11-28 12:14:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-28 12:14:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2018-11-28 12:14:51,239 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 32 [2018-11-28 12:14:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:51,239 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2018-11-28 12:14:51,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:14:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2018-11-28 12:14:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 12:14:51,240 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:51,241 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:51,241 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:51,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash 131544367, now seen corresponding path program 1 times [2018-11-28 12:14:51,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:51,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:51,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:51,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:51,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-28 12:14:51,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:14:51,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:14:51,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:14:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:14:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:14:51,312 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2018-11-28 12:14:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:51,361 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2018-11-28 12:14:51,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:14:51,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-11-28 12:14:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:51,364 INFO L225 Difference]: With dead ends: 78 [2018-11-28 12:14:51,364 INFO L226 Difference]: Without dead ends: 77 [2018-11-28 12:14:51,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:14:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-28 12:14:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2018-11-28 12:14:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-28 12:14:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2018-11-28 12:14:51,378 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 34 [2018-11-28 12:14:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:51,378 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2018-11-28 12:14:51,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:14:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2018-11-28 12:14:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 12:14:51,379 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:51,379 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:51,379 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:51,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash -217091865, now seen corresponding path program 1 times [2018-11-28 12:14:51,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:51,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:51,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:51,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:51,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 12:14:51,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:51,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:51,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:51,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:14:51,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:51,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2018-11-28 12:14:51,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:14:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:14:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:14:51,571 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2018-11-28 12:14:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:51,862 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2018-11-28 12:14:51,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:14:51,862 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-11-28 12:14:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:51,863 INFO L225 Difference]: With dead ends: 115 [2018-11-28 12:14:51,863 INFO L226 Difference]: Without dead ends: 70 [2018-11-28 12:14:51,864 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:14:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-28 12:14:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2018-11-28 12:14:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-28 12:14:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2018-11-28 12:14:51,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 35 [2018-11-28 12:14:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:51,874 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2018-11-28 12:14:51,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:14:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2018-11-28 12:14:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-28 12:14:51,876 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:51,876 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:51,876 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:51,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1444124818, now seen corresponding path program 1 times [2018-11-28 12:14:51,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:51,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:51,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:51,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:51,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-11-28 12:14:51,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:51,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:51,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:51,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-28 12:14:52,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:52,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-28 12:14:52,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:14:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:14:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:14:52,031 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 14 states. [2018-11-28 12:14:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:52,241 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2018-11-28 12:14:52,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:14:52,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2018-11-28 12:14:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:52,243 INFO L225 Difference]: With dead ends: 136 [2018-11-28 12:14:52,243 INFO L226 Difference]: Without dead ends: 89 [2018-11-28 12:14:52,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:14:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-28 12:14:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-11-28 12:14:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-28 12:14:52,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2018-11-28 12:14:52,252 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 59 [2018-11-28 12:14:52,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:52,252 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2018-11-28 12:14:52,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:14:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2018-11-28 12:14:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-28 12:14:52,254 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:52,254 INFO L402 BasicCegarLoop]: trace histogram [9, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:52,254 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:52,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1675070914, now seen corresponding path program 2 times [2018-11-28 12:14:52,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:52,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:52,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:52,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-28 12:14:52,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:14:52,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:14:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:14:52,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:14:52,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:14:52,304 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 5 states. [2018-11-28 12:14:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:52,328 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2018-11-28 12:14:52,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:14:52,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2018-11-28 12:14:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:52,330 INFO L225 Difference]: With dead ends: 86 [2018-11-28 12:14:52,330 INFO L226 Difference]: Without dead ends: 85 [2018-11-28 12:14:52,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:14:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-28 12:14:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-28 12:14:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-28 12:14:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2018-11-28 12:14:52,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 70 [2018-11-28 12:14:52,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:52,338 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2018-11-28 12:14:52,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:14:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2018-11-28 12:14:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 12:14:52,339 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:52,339 INFO L402 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:52,339 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:52,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1909772650, now seen corresponding path program 1 times [2018-11-28 12:14:52,340 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:52,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:52,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:52,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-28 12:14:52,382 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:14:52,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 12:14:52,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:14:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:14:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:14:52,384 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 5 states. [2018-11-28 12:14:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:52,415 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2018-11-28 12:14:52,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:14:52,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2018-11-28 12:14:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:52,416 INFO L225 Difference]: With dead ends: 89 [2018-11-28 12:14:52,417 INFO L226 Difference]: Without dead ends: 88 [2018-11-28 12:14:52,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:14:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-28 12:14:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-28 12:14:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-28 12:14:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2018-11-28 12:14:52,426 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 65 [2018-11-28 12:14:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:52,427 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2018-11-28 12:14:52,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:14:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2018-11-28 12:14:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-28 12:14:52,428 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:52,428 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:52,428 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:52,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash 399082410, now seen corresponding path program 3 times [2018-11-28 12:14:52,429 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:52,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:52,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:52,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 12:14:52,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:52,499 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:52,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:14:52,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 12:14:52,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:52,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-28 12:14:52,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:52,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 12:14:52,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:14:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:14:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:14:52,565 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 9 states. [2018-11-28 12:14:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:52,612 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2018-11-28 12:14:52,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:14:52,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2018-11-28 12:14:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:52,613 INFO L225 Difference]: With dead ends: 120 [2018-11-28 12:14:52,613 INFO L226 Difference]: Without dead ends: 119 [2018-11-28 12:14:52,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:14:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-28 12:14:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-11-28 12:14:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-28 12:14:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2018-11-28 12:14:52,626 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 71 [2018-11-28 12:14:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:52,627 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2018-11-28 12:14:52,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:14:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2018-11-28 12:14:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-28 12:14:52,628 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:52,629 INFO L402 BasicCegarLoop]: trace histogram [16, 13, 11, 9, 9, 9, 9, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:52,629 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:52,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1618309982, now seen corresponding path program 4 times [2018-11-28 12:14:52,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:52,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:52,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:52,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 105 proven. 200 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-11-28 12:14:52,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:52,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:52,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:14:52,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:14:52,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:52,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 309 proven. 86 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-11-28 12:14:52,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:52,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 18 [2018-11-28 12:14:52,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 12:14:52,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 12:14:52,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:14:52,869 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand 18 states. [2018-11-28 12:14:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:53,176 INFO L93 Difference]: Finished difference Result 221 states and 297 transitions. [2018-11-28 12:14:53,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 12:14:53,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 138 [2018-11-28 12:14:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:53,177 INFO L225 Difference]: With dead ends: 221 [2018-11-28 12:14:53,178 INFO L226 Difference]: Without dead ends: 134 [2018-11-28 12:14:53,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:14:53,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-28 12:14:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2018-11-28 12:14:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-28 12:14:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2018-11-28 12:14:53,188 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 138 [2018-11-28 12:14:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:53,188 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2018-11-28 12:14:53,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 12:14:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2018-11-28 12:14:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 12:14:53,190 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:53,190 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:53,190 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:53,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1659895493, now seen corresponding path program 5 times [2018-11-28 12:14:53,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:53,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:53,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:53,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:53,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-28 12:14:53,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:53,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:53,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:14:53,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-28 12:14:53,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:53,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 114 proven. 37 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-11-28 12:14:53,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:53,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-11-28 12:14:53,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:14:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:14:53,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:14:53,415 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand 12 states. [2018-11-28 12:14:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:53,593 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2018-11-28 12:14:53,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:14:53,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-11-28 12:14:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:53,594 INFO L225 Difference]: With dead ends: 226 [2018-11-28 12:14:53,594 INFO L226 Difference]: Without dead ends: 121 [2018-11-28 12:14:53,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:14:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-28 12:14:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2018-11-28 12:14:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-28 12:14:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2018-11-28 12:14:53,602 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 97 [2018-11-28 12:14:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:53,602 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2018-11-28 12:14:53,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:14:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2018-11-28 12:14:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-28 12:14:53,604 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:53,604 INFO L402 BasicCegarLoop]: trace histogram [20, 17, 13, 12, 12, 12, 12, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:53,604 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:53,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316141, now seen corresponding path program 6 times [2018-11-28 12:14:53,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:53,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:53,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:53,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 281 proven. 411 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-11-28 12:14:53,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:53,782 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:53,789 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:14:53,831 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-28 12:14:53,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:53,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 173 proven. 35 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2018-11-28 12:14:53,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:53,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 28 [2018-11-28 12:14:53,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 12:14:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 12:14:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:14:53,974 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 28 states. [2018-11-28 12:14:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:54,900 INFO L93 Difference]: Finished difference Result 300 states and 353 transitions. [2018-11-28 12:14:54,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-28 12:14:54,901 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 170 [2018-11-28 12:14:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:54,903 INFO L225 Difference]: With dead ends: 300 [2018-11-28 12:14:54,903 INFO L226 Difference]: Without dead ends: 180 [2018-11-28 12:14:54,905 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1291, Invalid=3539, Unknown=0, NotChecked=0, Total=4830 [2018-11-28 12:14:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-28 12:14:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 158. [2018-11-28 12:14:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-28 12:14:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2018-11-28 12:14:54,919 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 170 [2018-11-28 12:14:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:54,919 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2018-11-28 12:14:54,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 12:14:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2018-11-28 12:14:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-28 12:14:54,921 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:54,921 INFO L402 BasicCegarLoop]: trace histogram [15, 13, 10, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:54,921 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:54,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1065435471, now seen corresponding path program 7 times [2018-11-28 12:14:54,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:54,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:54,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:54,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:54,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 181 proven. 98 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-28 12:14:55,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:55,032 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:55,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:55,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 274 proven. 188 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-28 12:14:55,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:55,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 24 [2018-11-28 12:14:55,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 12:14:55,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 12:14:55,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:14:55,187 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand 24 states. [2018-11-28 12:14:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:55,649 INFO L93 Difference]: Finished difference Result 320 states and 372 transitions. [2018-11-28 12:14:55,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 12:14:55,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 130 [2018-11-28 12:14:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:55,650 INFO L225 Difference]: With dead ends: 320 [2018-11-28 12:14:55,651 INFO L226 Difference]: Without dead ends: 180 [2018-11-28 12:14:55,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:14:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-28 12:14:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2018-11-28 12:14:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-11-28 12:14:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2018-11-28 12:14:55,660 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 130 [2018-11-28 12:14:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:55,661 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2018-11-28 12:14:55,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 12:14:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2018-11-28 12:14:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-28 12:14:55,662 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:55,662 INFO L402 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:55,662 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:55,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash -623810062, now seen corresponding path program 2 times [2018-11-28 12:14:55,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:55,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:55,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:55,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:14:55,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-28 12:14:55,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:55,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:55,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:14:55,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:14:55,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:55,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2018-11-28 12:14:55,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:55,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2018-11-28 12:14:55,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:14:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:14:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:14:55,874 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand 13 states. [2018-11-28 12:14:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:55,945 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2018-11-28 12:14:55,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:14:55,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 117 [2018-11-28 12:14:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:55,948 INFO L225 Difference]: With dead ends: 164 [2018-11-28 12:14:55,948 INFO L226 Difference]: Without dead ends: 162 [2018-11-28 12:14:55,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:14:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-28 12:14:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-11-28 12:14:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-28 12:14:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2018-11-28 12:14:55,960 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 117 [2018-11-28 12:14:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:55,960 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2018-11-28 12:14:55,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:14:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2018-11-28 12:14:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-28 12:14:55,965 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:55,965 INFO L402 BasicCegarLoop]: trace histogram [23, 19, 18, 13, 13, 13, 13, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:55,966 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:55,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 478762197, now seen corresponding path program 8 times [2018-11-28 12:14:55,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:55,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:55,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:55,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:55,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 381 proven. 362 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2018-11-28 12:14:56,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:56,139 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:56,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:14:56,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:14:56,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:56,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 368 proven. 463 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-28 12:14:56,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:56,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 25 [2018-11-28 12:14:56,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 12:14:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 12:14:56,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:14:56,296 INFO L87 Difference]: Start difference. First operand 162 states and 182 transitions. Second operand 25 states. [2018-11-28 12:14:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:56,910 INFO L93 Difference]: Finished difference Result 320 states and 363 transitions. [2018-11-28 12:14:56,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-28 12:14:56,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 208 [2018-11-28 12:14:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:56,912 INFO L225 Difference]: With dead ends: 320 [2018-11-28 12:14:56,912 INFO L226 Difference]: Without dead ends: 172 [2018-11-28 12:14:56,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=964, Invalid=2696, Unknown=0, NotChecked=0, Total=3660 [2018-11-28 12:14:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-11-28 12:14:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2018-11-28 12:14:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-28 12:14:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2018-11-28 12:14:56,921 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 208 [2018-11-28 12:14:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:56,921 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2018-11-28 12:14:56,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 12:14:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2018-11-28 12:14:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-28 12:14:56,923 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:56,923 INFO L402 BasicCegarLoop]: trace histogram [19, 16, 14, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:56,923 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:56,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:56,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1226786477, now seen corresponding path program 9 times [2018-11-28 12:14:56,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:56,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:56,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:56,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:56,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-28 12:14:57,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:57,005 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:57,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:14:57,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-11-28 12:14:57,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:57,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-28 12:14:57,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:57,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-11-28 12:14:57,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 12:14:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 12:14:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:14:57,152 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand 17 states. [2018-11-28 12:14:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:57,200 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2018-11-28 12:14:57,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:14:57,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 169 [2018-11-28 12:14:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:57,202 INFO L225 Difference]: With dead ends: 154 [2018-11-28 12:14:57,202 INFO L226 Difference]: Without dead ends: 153 [2018-11-28 12:14:57,202 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:14:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-28 12:14:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-28 12:14:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-28 12:14:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2018-11-28 12:14:57,211 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 169 [2018-11-28 12:14:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:57,212 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2018-11-28 12:14:57,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 12:14:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2018-11-28 12:14:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-28 12:14:57,212 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:57,212 INFO L402 BasicCegarLoop]: trace histogram [28, 24, 23, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:57,213 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:57,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash -333231388, now seen corresponding path program 10 times [2018-11-28 12:14:57,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:57,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:57,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:57,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:57,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-28 12:14:57,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:57,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:57,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:14:57,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:14:57,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:57,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-28 12:14:57,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:57,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2018-11-28 12:14:57,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 12:14:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 12:14:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:14:57,513 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand 21 states. [2018-11-28 12:14:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:57,572 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2018-11-28 12:14:57,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:14:57,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 261 [2018-11-28 12:14:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:57,573 INFO L225 Difference]: With dead ends: 154 [2018-11-28 12:14:57,573 INFO L226 Difference]: Without dead ends: 153 [2018-11-28 12:14:57,574 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:14:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-28 12:14:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-28 12:14:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-28 12:14:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2018-11-28 12:14:57,582 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 261 [2018-11-28 12:14:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:57,583 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2018-11-28 12:14:57,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 12:14:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2018-11-28 12:14:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-28 12:14:57,587 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:57,587 INFO L402 BasicCegarLoop]: trace histogram [43, 40, 35, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:57,587 INFO L423 AbstractCegarLoop]: === Iteration 18 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:57,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:57,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1881532310, now seen corresponding path program 11 times [2018-11-28 12:14:57,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:57,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:57,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:57,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:57,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-28 12:14:57,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:57,870 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:57,876 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:14:57,956 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-11-28 12:14:57,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:57,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-28 12:14:58,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:58,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2018-11-28 12:14:58,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 12:14:58,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 12:14:58,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:14:58,117 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand 25 states. [2018-11-28 12:14:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:58,173 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2018-11-28 12:14:58,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 12:14:58,173 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 412 [2018-11-28 12:14:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:58,174 INFO L225 Difference]: With dead ends: 154 [2018-11-28 12:14:58,175 INFO L226 Difference]: Without dead ends: 153 [2018-11-28 12:14:58,175 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:14:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-28 12:14:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-28 12:14:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-28 12:14:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 162 transitions. [2018-11-28 12:14:58,181 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 162 transitions. Word has length 412 [2018-11-28 12:14:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:58,182 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 162 transitions. [2018-11-28 12:14:58,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 12:14:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 162 transitions. [2018-11-28 12:14:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-28 12:14:58,185 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:58,185 INFO L402 BasicCegarLoop]: trace histogram [68, 66, 55, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 32, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:58,185 INFO L423 AbstractCegarLoop]: === Iteration 19 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:58,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:58,186 INFO L82 PathProgramCache]: Analyzing trace with hash 355145621, now seen corresponding path program 12 times [2018-11-28 12:14:58,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:58,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:58,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:58,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:58,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:14:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-28 12:14:58,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:14:58,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:14:58,689 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:14:58,878 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-11-28 12:14:58,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:14:58,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:14:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-28 12:14:59,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:14:59,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2018-11-28 12:14:59,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 12:14:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 12:14:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:14:59,211 INFO L87 Difference]: Start difference. First operand 153 states and 162 transitions. Second operand 29 states. [2018-11-28 12:14:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:14:59,288 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2018-11-28 12:14:59,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:14:59,288 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 661 [2018-11-28 12:14:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:14:59,289 INFO L225 Difference]: With dead ends: 154 [2018-11-28 12:14:59,289 INFO L226 Difference]: Without dead ends: 153 [2018-11-28 12:14:59,290 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:14:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-28 12:14:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-28 12:14:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-28 12:14:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 161 transitions. [2018-11-28 12:14:59,294 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 161 transitions. Word has length 661 [2018-11-28 12:14:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:14:59,295 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 161 transitions. [2018-11-28 12:14:59,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 12:14:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 161 transitions. [2018-11-28 12:14:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-11-28 12:14:59,304 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:14:59,304 INFO L402 BasicCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:14:59,304 INFO L423 AbstractCegarLoop]: === Iteration 20 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 12:14:59,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:14:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -642383590, now seen corresponding path program 13 times [2018-11-28 12:14:59,305 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:14:59,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:14:59,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:59,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:14:59,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:14:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:15:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-28 12:15:00,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:15:00,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:15:00,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:15:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:15:00,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:15:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-28 12:15:01,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:15:01,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 32 [2018-11-28 12:15:01,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-28 12:15:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-28 12:15:01,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 12:15:01,156 INFO L87 Difference]: Start difference. First operand 153 states and 161 transitions. Second operand 33 states. [2018-11-28 12:15:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:15:01,248 INFO L93 Difference]: Finished difference Result 153 states and 161 transitions. [2018-11-28 12:15:01,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 12:15:01,249 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1067 [2018-11-28 12:15:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:15:01,250 INFO L225 Difference]: With dead ends: 153 [2018-11-28 12:15:01,250 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 12:15:01,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 12:15:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 12:15:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 12:15:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 12:15:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:15:01,251 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1067 [2018-11-28 12:15:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:15:01,252 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:15:01,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-28 12:15:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:15:01,252 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 12:15:01,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 12:15:01,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 12:15:01,391 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 12:15:01,870 WARN L180 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 72 [2018-11-28 12:15:02,080 WARN L180 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 24 [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-28 12:15:02,082 INFO L448 ceAbstractionStarter]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,083 INFO L448 ceAbstractionStarter]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,083 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-28 12:15:02,083 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,083 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,083 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (< 3 |fibonacci_#in~n|) (<= 2 fibonacci_~n)) (or (< 8 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| fibonacci_~n) .cse0)) (or (and (<= 9 fibonacci_~n) .cse0) (< |fibonacci_#in~n| 9) (< 9 |fibonacci_#in~n|)))) [2018-11-28 12:15:02,083 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,083 INFO L448 ceAbstractionStarter]: For program point L20-4(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,083 INFO L448 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L444 ceAbstractionStarter]: At program point L20-6(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= 2 |fibonacci_#t~ret0|)) (.cse2 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (and (<= |fibonacci_#t~ret0| 8) .cse0 .cse1 .cse2) (or (< 7 |fibonacci_#in~n|) (< |fibonacci_#in~n| 7))) (or (< |fibonacci_#in~n| 8) (< 8 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 13) .cse0 .cse1 .cse2)) (or (and (<= |fibonacci_#t~ret0| 21) .cse0 .cse1 .cse2) (< |fibonacci_#in~n| 9) (< 9 |fibonacci_#in~n|)) (or (and .cse0 (<= |fibonacci_#t~ret0| 2) .cse1 .cse2) (< 4 |fibonacci_#in~n|) (and .cse0 (<= fibonacci_~n 3))) (or (and (<= |fibonacci_#t~ret0| 3) .cse1 (<= 5 fibonacci_~n) .cse2) (or (< 5 |fibonacci_#in~n|) (< |fibonacci_#in~n| 5))) (or (or (< |fibonacci_#in~n| 6) (< 6 |fibonacci_#in~n|)) (and (<= |fibonacci_#t~ret0| 5) (<= 6 fibonacci_~n) .cse1 .cse2)) (or (< 3 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 1) (<= 1 |fibonacci_#t~ret0|) (<= 2 fibonacci_~n) .cse2)))) [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point L20-8(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point L20-9(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 12:15:02,084 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 12:15:02,084 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-28 12:15:02,085 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-28 12:15:02,085 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-28 12:15:02,085 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-28 12:15:02,085 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-11-28 12:15:02,085 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-28 12:15:02,085 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-28 12:15:02,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:15:02 BoogieIcfgContainer [2018-11-28 12:15:02,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:15:02,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:15:02,087 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:15:02,088 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:15:02,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:14:50" (3/4) ... [2018-11-28 12:15:02,090 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 12:15:02,094 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-28 12:15:02,094 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 12:15:02,094 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 12:15:02,097 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 12:15:02,097 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 12:15:02,097 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:15:02,129 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_67dd0a14-89b5-4cd0-86a8-59e7ffe3d6de/bin-2019/uautomizer/witness.graphml [2018-11-28 12:15:02,129 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:15:02,130 INFO L168 Benchmark]: Toolchain (without parser) took 12278.97 ms. Allocated memory was 1.0 GB in the beginning and 1.9 GB in the end (delta: 854.1 MB). Free memory was 958.7 MB in the beginning and 1.3 GB in the end (delta: -296.8 MB). Peak memory consumption was 557.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:15:02,131 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:15:02,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.57 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:15:02,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.72 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:15:02,131 INFO L168 Benchmark]: Boogie Preprocessor took 14.38 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:15:02,131 INFO L168 Benchmark]: RCFGBuilder took 246.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -166.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-28 12:15:02,132 INFO L168 Benchmark]: TraceAbstraction took 11815.00 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 723.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -141.6 MB). Peak memory consumption was 582.0 MB. Max. memory is 11.5 GB. [2018-11-28 12:15:02,132 INFO L168 Benchmark]: Witness Printer took 41.94 ms. Allocated memory is still 1.9 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2018-11-28 12:15:02,134 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.57 ms. Allocated memory is still 1.0 GB. Free memory was 958.7 MB in the beginning and 947.9 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 18.72 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.38 ms. Allocated memory is still 1.0 GB. Free memory is still 947.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 246.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -166.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11815.00 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 723.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -141.6 MB). Peak memory consumption was 582.0 MB. Max. memory is 11.5 GB. * Witness Printer took 41.94 ms. Allocated memory is still 1.9 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 6 error locations. SAFE Result, 11.7s OverallTime, 20 OverallIterations, 109 TraceHistogramMax, 3.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 576 SDtfs, 2455 SDslu, 3143 SDs, 0 SdLazy, 3813 SolverSat, 969 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4432 GetRequests, 4016 SyntacticMatches, 2 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 122 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 296 PreInvPairs, 450 NumberOfFragments, 206 HoareAnnotationTreeSize, 296 FomulaSimplifications, 3663 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3432 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 7444 NumberOfCodeBlocks, 7314 NumberOfCodeBlocksAsserted, 150 NumberOfCheckSat, 7409 ConstructedInterpolants, 0 QuantifiedInterpolants, 9868557 SizeOfPredicates, 43 NumberOfNonLiveVariables, 6522 ConjunctsInSsa, 634 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 115588/142365 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...