./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 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 0.1.23-635dfa2 [2018-12-08 12:05:32,354 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 12:05:32,354 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 12:05:32,362 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 12:05:32,362 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 12:05:32,362 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 12:05:32,363 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 12:05:32,364 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 12:05:32,365 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 12:05:32,365 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 12:05:32,366 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 12:05:32,366 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 12:05:32,367 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 12:05:32,367 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 12:05:32,368 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 12:05:32,369 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 12:05:32,369 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 12:05:32,370 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 12:05:32,372 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 12:05:32,373 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 12:05:32,373 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 12:05:32,374 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 12:05:32,376 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 12:05:32,376 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 12:05:32,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 12:05:32,377 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 12:05:32,377 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 12:05:32,378 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 12:05:32,379 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 12:05:32,379 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 12:05:32,379 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 12:05:32,380 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 12:05:32,380 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 12:05:32,380 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 12:05:32,381 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 12:05:32,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 12:05:32,381 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2018-12-08 12:05:32,391 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 12:05:32,391 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 12:05:32,392 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 12:05:32,392 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 12:05:32,392 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 12:05:32,392 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 12:05:32,393 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 12:05:32,393 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 12:05:32,394 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 12:05:32,394 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 12:05:32,395 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 12:05:32,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 12:05:32,395 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_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:32,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 12:05:32,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 12:05:32,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 12:05:32,431 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 12:05:32,431 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 12:05:32,431 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 12:05:32,468 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/data/5dcfe7573/e38c3d7de3334383ab611aa032433fc4/FLAGefa6275ca [2018-12-08 12:05:32,875 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 12:05:32,875 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 12:05:32,879 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/data/5dcfe7573/e38c3d7de3334383ab611aa032433fc4/FLAGefa6275ca [2018-12-08 12:05:32,887 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/data/5dcfe7573/e38c3d7de3334383ab611aa032433fc4 [2018-12-08 12:05:32,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 12:05:32,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 12:05:32,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 12:05:32,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 12:05:32,892 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 12:05:32,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 12:05:32" (1/1) ... [2018-12-08 12:05:32,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d92faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:32, skipping insertion in model container [2018-12-08 12:05:32,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 12:05:32" (1/1) ... [2018-12-08 12:05:32,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 12:05:32,906 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 12:05:32,987 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 12:05:32,990 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 12:05:32,998 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 12:05:33,006 INFO L195 MainTranslator]: Completed translation [2018-12-08 12:05:33,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33 WrapperNode [2018-12-08 12:05:33,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 12:05:33,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 12:05:33,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 12:05:33,007 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 12:05:33,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 12:05:33,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 12:05:33,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 12:05:33,019 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 12:05:33,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... [2018-12-08 12:05:33,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 12:05:33,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 12:05:33,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 12:05:33,029 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 12:05:33,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-08 12:05:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-08 12:05:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 12:05:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 12:05:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 12:05:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 12:05:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 12:05:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 12:05:33,193 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 12:05:33,193 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 12:05:33,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 12:05:33 BoogieIcfgContainer [2018-12-08 12:05:33,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 12:05:33,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 12:05:33,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 12:05:33,196 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 12:05:33,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 12:05:32" (1/3) ... [2018-12-08 12:05:33,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33802597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 12:05:33, skipping insertion in model container [2018-12-08 12:05:33,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:05:33" (2/3) ... [2018-12-08 12:05:33,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33802597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 12:05:33, skipping insertion in model container [2018-12-08 12:05:33,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 12:05:33" (3/3) ... [2018-12-08 12:05:33,197 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 12:05:33,203 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 12:05:33,207 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-12-08 12:05:33,216 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-12-08 12:05:33,233 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 12:05:33,233 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 12:05:33,233 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 12:05:33,233 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 12:05:33,233 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 12:05:33,234 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 12:05:33,234 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 12:05:33,234 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 12:05:33,234 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 12:05:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-12-08 12:05:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 12:05:33,247 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:33,247 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:33,249 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:33,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1707029017, now seen corresponding path program 1 times [2018-12-08 12:05:33,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:33,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:33,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 12:05:33,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:05:33,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 12:05:33,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 12:05:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 12:05:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 12:05:33,361 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2018-12-08 12:05:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:33,417 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-12-08 12:05:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 12:05:33,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-08 12:05:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:33,424 INFO L225 Difference]: With dead ends: 38 [2018-12-08 12:05:33,424 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 12:05:33,425 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 [2018-12-08 12:05:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 12:05:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-08 12:05:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 12:05:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-12-08 12:05:33,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-12-08 12:05:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:33,448 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-12-08 12:05:33,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 12:05:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-12-08 12:05:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-08 12:05:33,449 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:33,449 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:33,449 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:33,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:33,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1378291933, now seen corresponding path program 1 times [2018-12-08 12:05:33,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:33,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:33,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 12:05:33,461 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:05:33,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 12:05:33,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 12:05:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 12:05:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 12:05:33,463 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2018-12-08 12:05:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:33,476 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-12-08 12:05:33,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 12:05:33,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-12-08 12:05:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:33,479 INFO L225 Difference]: With dead ends: 27 [2018-12-08 12:05:33,479 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 12:05:33,480 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 [2018-12-08 12:05:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 12:05:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-12-08 12:05:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 12:05:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-12-08 12:05:33,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2018-12-08 12:05:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:33,486 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-12-08 12:05:33,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 12:05:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-12-08 12:05:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-08 12:05:33,487 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:33,487 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] [2018-12-08 12:05:33,487 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:33,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:33,488 INFO L82 PathProgramCache]: Analyzing trace with hash -995069271, now seen corresponding path program 1 times [2018-12-08 12:05:33,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:33,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:33,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-08 12:05:33,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:33,542 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:33,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 12:05:33,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:33,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2018-12-08 12:05:33,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 12:05:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 12:05:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-12-08 12:05:33,644 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2018-12-08 12:05:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:33,787 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2018-12-08 12:05:33,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 12:05:33,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-12-08 12:05:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:33,788 INFO L225 Difference]: With dead ends: 78 [2018-12-08 12:05:33,788 INFO L226 Difference]: Without dead ends: 59 [2018-12-08 12:05:33,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-12-08 12:05:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-08 12:05:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2018-12-08 12:05:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-08 12:05:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2018-12-08 12:05:33,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 32 [2018-12-08 12:05:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:33,797 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2018-12-08 12:05:33,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 12:05:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2018-12-08 12:05:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-08 12:05:33,798 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:33,798 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] [2018-12-08 12:05:33,799 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:33,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:33,799 INFO L82 PathProgramCache]: Analyzing trace with hash 131544367, now seen corresponding path program 1 times [2018-12-08 12:05:33,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:33,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:33,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-08 12:05:33,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:05:33,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 12:05:33,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 12:05:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 12:05:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 12:05:33,831 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2018-12-08 12:05:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:33,855 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2018-12-08 12:05:33,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 12:05:33,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-12-08 12:05:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:33,857 INFO L225 Difference]: With dead ends: 78 [2018-12-08 12:05:33,857 INFO L226 Difference]: Without dead ends: 77 [2018-12-08 12:05:33,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 12:05:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-08 12:05:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2018-12-08 12:05:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-08 12:05:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2018-12-08 12:05:33,864 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 34 [2018-12-08 12:05:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:33,864 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2018-12-08 12:05:33,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 12:05:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2018-12-08 12:05:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-08 12:05:33,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:33,865 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] [2018-12-08 12:05:33,865 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:33,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:33,866 INFO L82 PathProgramCache]: Analyzing trace with hash -217091865, now seen corresponding path program 1 times [2018-12-08 12:05:33,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:33,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:33,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-08 12:05:33,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:33,892 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:33,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:33,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 12:05:33,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:33,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2018-12-08 12:05:33,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 12:05:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 12:05:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-12-08 12:05:33,970 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2018-12-08 12:05:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:34,196 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2018-12-08 12:05:34,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 12:05:34,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-12-08 12:05:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:34,197 INFO L225 Difference]: With dead ends: 115 [2018-12-08 12:05:34,197 INFO L226 Difference]: Without dead ends: 70 [2018-12-08 12:05:34,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-12-08 12:05:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-12-08 12:05:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2018-12-08 12:05:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-08 12:05:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2018-12-08 12:05:34,206 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 35 [2018-12-08 12:05:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:34,206 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2018-12-08 12:05:34,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 12:05:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2018-12-08 12:05:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-08 12:05:34,208 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:34,208 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:34,208 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:34,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1599239471, now seen corresponding path program 1 times [2018-12-08 12:05:34,208 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:34,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:34,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:34,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-12-08 12:05:34,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:34,258 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:34,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:34,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 82 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-08 12:05:34,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:34,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-12-08 12:05:34,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 12:05:34,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 12:05:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-12-08 12:05:34,351 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 14 states. [2018-12-08 12:05:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:34,525 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2018-12-08 12:05:34,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 12:05:34,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-12-08 12:05:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:34,526 INFO L225 Difference]: With dead ends: 138 [2018-12-08 12:05:34,526 INFO L226 Difference]: Without dead ends: 92 [2018-12-08 12:05:34,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2018-12-08 12:05:34,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-12-08 12:05:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2018-12-08 12:05:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-08 12:05:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2018-12-08 12:05:34,532 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 74 [2018-12-08 12:05:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:34,532 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2018-12-08 12:05:34,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 12:05:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2018-12-08 12:05:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-08 12:05:34,533 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:34,533 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] [2018-12-08 12:05:34,533 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:34,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1675070914, now seen corresponding path program 2 times [2018-12-08 12:05:34,534 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:34,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:34,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:34,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 12:05:34,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:05:34,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 12:05:34,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 12:05:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 12:05:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 12:05:34,559 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 5 states. [2018-12-08 12:05:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:34,580 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-12-08 12:05:34,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 12:05:34,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2018-12-08 12:05:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:34,581 INFO L225 Difference]: With dead ends: 85 [2018-12-08 12:05:34,581 INFO L226 Difference]: Without dead ends: 84 [2018-12-08 12:05:34,582 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 12:05:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-12-08 12:05:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-12-08 12:05:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-08 12:05:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-12-08 12:05:34,589 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 70 [2018-12-08 12:05:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:34,590 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-12-08 12:05:34,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 12:05:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-12-08 12:05:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-12-08 12:05:34,591 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:34,591 INFO L402 BasicCegarLoop]: trace histogram [9, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:34,591 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:34,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:34,592 INFO L82 PathProgramCache]: Analyzing trace with hash 387590836, now seen corresponding path program 1 times [2018-12-08 12:05:34,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:34,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:34,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:34,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-12-08 12:05:34,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:05:34,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-08 12:05:34,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 12:05:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 12:05:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 12:05:34,627 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 5 states. [2018-12-08 12:05:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:34,644 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2018-12-08 12:05:34,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 12:05:34,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2018-12-08 12:05:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:34,645 INFO L225 Difference]: With dead ends: 88 [2018-12-08 12:05:34,645 INFO L226 Difference]: Without dead ends: 87 [2018-12-08 12:05:34,645 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 12:05:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-08 12:05:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2018-12-08 12:05:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-12-08 12:05:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-12-08 12:05:34,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 71 [2018-12-08 12:05:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:34,653 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-12-08 12:05:34,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 12:05:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-12-08 12:05:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-12-08 12:05:34,654 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:34,654 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:34,654 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:34,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1898281076, now seen corresponding path program 3 times [2018-12-08 12:05:34,655 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:34,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:34,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:34,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 12:05:34,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:34,698 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:34,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 12:05:34,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 12:05:34,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:34,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-08 12:05:34,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:34,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-12-08 12:05:34,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 12:05:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 12:05:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-12-08 12:05:34,749 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 9 states. [2018-12-08 12:05:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:34,782 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2018-12-08 12:05:34,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 12:05:34,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2018-12-08 12:05:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:34,783 INFO L225 Difference]: With dead ends: 106 [2018-12-08 12:05:34,783 INFO L226 Difference]: Without dead ends: 105 [2018-12-08 12:05:34,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-08 12:05:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-08 12:05:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2018-12-08 12:05:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-08 12:05:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2018-12-08 12:05:34,789 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 65 [2018-12-08 12:05:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:34,789 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2018-12-08 12:05:34,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 12:05:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2018-12-08 12:05:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-12-08 12:05:34,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:34,791 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] [2018-12-08 12:05:34,791 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:34,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1618309982, now seen corresponding path program 4 times [2018-12-08 12:05:34,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:34,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:34,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:34,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 105 proven. 200 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-12-08 12:05:34,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:34,842 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:34,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 12:05:34,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 12:05:34,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:34,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 309 proven. 86 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-12-08 12:05:34,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:34,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 18 [2018-12-08 12:05:34,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 12:05:34,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 12:05:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2018-12-08 12:05:34,969 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand 18 states. [2018-12-08 12:05:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:35,293 INFO L93 Difference]: Finished difference Result 216 states and 294 transitions. [2018-12-08 12:05:35,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 12:05:35,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 138 [2018-12-08 12:05:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:35,295 INFO L225 Difference]: With dead ends: 216 [2018-12-08 12:05:35,295 INFO L226 Difference]: Without dead ends: 137 [2018-12-08 12:05:35,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2018-12-08 12:05:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-12-08 12:05:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2018-12-08 12:05:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-12-08 12:05:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2018-12-08 12:05:35,306 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 138 [2018-12-08 12:05:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:35,306 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2018-12-08 12:05:35,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 12:05:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2018-12-08 12:05:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-12-08 12:05:35,308 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:35,308 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 7, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:35,308 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:35,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash -39580003, now seen corresponding path program 5 times [2018-12-08 12:05:35,309 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:35,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:35,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 93 proven. 34 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-12-08 12:05:35,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:35,390 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:35,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 12:05:35,415 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-08 12:05:35,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:35,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 57 proven. 188 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 12:05:35,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:35,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 24 [2018-12-08 12:05:35,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-08 12:05:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-08 12:05:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2018-12-08 12:05:35,570 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand 24 states. [2018-12-08 12:05:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:36,081 INFO L93 Difference]: Finished difference Result 376 states and 636 transitions. [2018-12-08 12:05:36,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-08 12:05:36,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 91 [2018-12-08 12:05:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:36,083 INFO L225 Difference]: With dead ends: 376 [2018-12-08 12:05:36,083 INFO L226 Difference]: Without dead ends: 271 [2018-12-08 12:05:36,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 12:05:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-12-08 12:05:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 233. [2018-12-08 12:05:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-12-08 12:05:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 353 transitions. [2018-12-08 12:05:36,097 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 353 transitions. Word has length 91 [2018-12-08 12:05:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:36,097 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 353 transitions. [2018-12-08 12:05:36,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-08 12:05:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 353 transitions. [2018-12-08 12:05:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-12-08 12:05:36,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:36,099 INFO L402 BasicCegarLoop]: trace histogram [24, 19, 15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:36,099 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:36,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash 211311046, now seen corresponding path program 6 times [2018-12-08 12:05:36,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:36,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:36,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:36,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:36,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 286 proven. 613 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2018-12-08 12:05:36,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:36,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:36,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 12:05:36,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-12-08 12:05:36,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:36,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 883 proven. 161 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2018-12-08 12:05:36,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:36,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 25 [2018-12-08 12:05:36,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-08 12:05:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-08 12:05:36,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2018-12-08 12:05:36,427 INFO L87 Difference]: Start difference. First operand 233 states and 353 transitions. Second operand 25 states. [2018-12-08 12:05:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:36,851 INFO L93 Difference]: Finished difference Result 399 states and 595 transitions. [2018-12-08 12:05:36,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-08 12:05:36,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 200 [2018-12-08 12:05:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:36,852 INFO L225 Difference]: With dead ends: 399 [2018-12-08 12:05:36,852 INFO L226 Difference]: Without dead ends: 165 [2018-12-08 12:05:36,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1687, Unknown=0, NotChecked=0, Total=2352 [2018-12-08 12:05:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-12-08 12:05:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2018-12-08 12:05:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-12-08 12:05:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 178 transitions. [2018-12-08 12:05:36,859 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 178 transitions. Word has length 200 [2018-12-08 12:05:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:36,859 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 178 transitions. [2018-12-08 12:05:36,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-08 12:05:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 178 transitions. [2018-12-08 12:05:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-12-08 12:05:36,860 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:36,860 INFO L402 BasicCegarLoop]: trace histogram [14, 11, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:36,860 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:36,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:36,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1611838702, now seen corresponding path program 2 times [2018-12-08 12:05:36,860 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:36,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:36,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:36,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:36,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 77 proven. 57 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2018-12-08 12:05:36,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:36,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:36,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 12:05:36,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 12:05:36,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:36,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 188 proven. 214 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-12-08 12:05:37,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:37,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18] total 23 [2018-12-08 12:05:37,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-08 12:05:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-08 12:05:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2018-12-08 12:05:37,055 INFO L87 Difference]: Start difference. First operand 155 states and 178 transitions. Second operand 23 states. [2018-12-08 12:05:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:37,333 INFO L93 Difference]: Finished difference Result 294 states and 337 transitions. [2018-12-08 12:05:37,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-08 12:05:37,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2018-12-08 12:05:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:37,334 INFO L225 Difference]: With dead ends: 294 [2018-12-08 12:05:37,335 INFO L226 Difference]: Without dead ends: 157 [2018-12-08 12:05:37,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 12:05:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-12-08 12:05:37,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2018-12-08 12:05:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-08 12:05:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2018-12-08 12:05:37,340 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 116 [2018-12-08 12:05:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:37,340 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2018-12-08 12:05:37,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-08 12:05:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2018-12-08 12:05:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-12-08 12:05:37,341 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:37,341 INFO L402 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:05:37,342 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:37,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1128501564, now seen corresponding path program 7 times [2018-12-08 12:05:37,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:37,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:37,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:37,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-12-08 12:05:37,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:37,404 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:37,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:37,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-12-08 12:05:37,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:37,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-12-08 12:05:37,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 12:05:37,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 12:05:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-08 12:05:37,476 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand 13 states. [2018-12-08 12:05:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:37,508 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2018-12-08 12:05:37,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 12:05:37,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 116 [2018-12-08 12:05:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:37,509 INFO L225 Difference]: With dead ends: 146 [2018-12-08 12:05:37,509 INFO L226 Difference]: Without dead ends: 145 [2018-12-08 12:05:37,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-12-08 12:05:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-12-08 12:05:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2018-12-08 12:05:37,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-08 12:05:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2018-12-08 12:05:37,513 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 116 [2018-12-08 12:05:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:37,514 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2018-12-08 12:05:37,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 12:05:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2018-12-08 12:05:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-08 12:05:37,514 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:37,514 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] [2018-12-08 12:05:37,514 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:37,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash -623810062, now seen corresponding path program 3 times [2018-12-08 12:05:37,515 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:37,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:37,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:05:37,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-12-08 12:05:37,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:37,544 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:37,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 12:05:37,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-08 12:05:37,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:37,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-12-08 12:05:37,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:37,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-12-08 12:05:37,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 12:05:37,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 12:05:37,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-12-08 12:05:37,604 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand 10 states. [2018-12-08 12:05:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:37,638 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2018-12-08 12:05:37,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 12:05:37,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 117 [2018-12-08 12:05:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:37,639 INFO L225 Difference]: With dead ends: 144 [2018-12-08 12:05:37,639 INFO L226 Difference]: Without dead ends: 142 [2018-12-08 12:05:37,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-12-08 12:05:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-08 12:05:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-12-08 12:05:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 12:05:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2018-12-08 12:05:37,643 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 117 [2018-12-08 12:05:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:37,643 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2018-12-08 12:05:37,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 12:05:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2018-12-08 12:05:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-12-08 12:05:37,644 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:37,644 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] [2018-12-08 12:05:37,644 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:37,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1226786477, now seen corresponding path program 8 times [2018-12-08 12:05:37,645 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:37,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:37,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:37,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-12-08 12:05:37,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:37,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:37,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 12:05:37,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 12:05:37,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:37,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-12-08 12:05:37,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:37,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-12-08 12:05:37,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 12:05:37,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 12:05:37,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-12-08 12:05:37,827 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand 17 states. [2018-12-08 12:05:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:37,897 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2018-12-08 12:05:37,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 12:05:37,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 169 [2018-12-08 12:05:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:37,899 INFO L225 Difference]: With dead ends: 143 [2018-12-08 12:05:37,899 INFO L226 Difference]: Without dead ends: 142 [2018-12-08 12:05:37,899 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 [2018-12-08 12:05:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-08 12:05:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-12-08 12:05:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 12:05:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 155 transitions. [2018-12-08 12:05:37,904 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 155 transitions. Word has length 169 [2018-12-08 12:05:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:37,904 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 155 transitions. [2018-12-08 12:05:37,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 12:05:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 155 transitions. [2018-12-08 12:05:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-12-08 12:05:37,905 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:37,905 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] [2018-12-08 12:05:37,905 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:37,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:37,905 INFO L82 PathProgramCache]: Analyzing trace with hash -333231388, now seen corresponding path program 9 times [2018-12-08 12:05:37,905 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:37,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-12-08 12:05:38,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:38,039 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:38,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 12:05:38,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-12-08 12:05:38,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:38,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-12-08 12:05:38,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:38,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2018-12-08 12:05:38,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-08 12:05:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 12:05:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-12-08 12:05:38,189 INFO L87 Difference]: Start difference. First operand 142 states and 155 transitions. Second operand 21 states. [2018-12-08 12:05:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:38,247 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2018-12-08 12:05:38,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 12:05:38,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 261 [2018-12-08 12:05:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:38,248 INFO L225 Difference]: With dead ends: 143 [2018-12-08 12:05:38,248 INFO L226 Difference]: Without dead ends: 142 [2018-12-08 12:05:38,249 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 [2018-12-08 12:05:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-08 12:05:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-12-08 12:05:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 12:05:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2018-12-08 12:05:38,253 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 261 [2018-12-08 12:05:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:38,253 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2018-12-08 12:05:38,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-08 12:05:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2018-12-08 12:05:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-12-08 12:05:38,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:38,254 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] [2018-12-08 12:05:38,254 INFO L423 AbstractCegarLoop]: === Iteration 18 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:38,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1881532310, now seen corresponding path program 10 times [2018-12-08 12:05:38,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:38,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:38,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:38,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:38,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-12-08 12:05:38,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:38,451 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:38,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 12:05:38,502 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 12:05:38,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:38,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-12-08 12:05:38,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:38,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2018-12-08 12:05:38,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-08 12:05:38,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-08 12:05:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-12-08 12:05:38,677 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 25 states. [2018-12-08 12:05:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:38,743 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-12-08 12:05:38,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 12:05:38,743 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 412 [2018-12-08 12:05:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:38,744 INFO L225 Difference]: With dead ends: 143 [2018-12-08 12:05:38,744 INFO L226 Difference]: Without dead ends: 142 [2018-12-08 12:05:38,744 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 [2018-12-08 12:05:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-08 12:05:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-12-08 12:05:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 12:05:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2018-12-08 12:05:38,748 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 412 [2018-12-08 12:05:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:38,748 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2018-12-08 12:05:38,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-08 12:05:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2018-12-08 12:05:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-12-08 12:05:38,750 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:38,750 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] [2018-12-08 12:05:38,750 INFO L423 AbstractCegarLoop]: === Iteration 19 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:38,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:38,751 INFO L82 PathProgramCache]: Analyzing trace with hash 355145621, now seen corresponding path program 11 times [2018-12-08 12:05:38,751 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:38,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:38,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:38,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:38,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-12-08 12:05:39,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:39,098 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:39,103 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 12:05:39,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2018-12-08 12:05:39,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:39,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-12-08 12:05:39,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:39,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2018-12-08 12:05:39,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-08 12:05:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-08 12:05:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-12-08 12:05:39,554 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand 29 states. [2018-12-08 12:05:39,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:39,628 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2018-12-08 12:05:39,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-08 12:05:39,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 661 [2018-12-08 12:05:39,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:39,629 INFO L225 Difference]: With dead ends: 143 [2018-12-08 12:05:39,629 INFO L226 Difference]: Without dead ends: 142 [2018-12-08 12:05:39,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-12-08 12:05:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-12-08 12:05:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-12-08 12:05:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-08 12:05:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2018-12-08 12:05:39,633 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 661 [2018-12-08 12:05:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:39,634 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2018-12-08 12:05:39,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-08 12:05:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2018-12-08 12:05:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-12-08 12:05:39,638 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:05:39,638 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] [2018-12-08 12:05:39,638 INFO L423 AbstractCegarLoop]: === Iteration 20 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-08 12:05:39,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:05:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -642383590, now seen corresponding path program 12 times [2018-12-08 12:05:39,638 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:05:39,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:05:39,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:39,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:05:39,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:05:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:05:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-12-08 12:05:40,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:05:40,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/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 [2018-12-08 12:05:40,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 12:05:40,631 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2018-12-08 12:05:40,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:05:40,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:05:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-12-08 12:05:41,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:05:41,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 32 [2018-12-08 12:05:41,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-08 12:05:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-08 12:05:41,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-12-08 12:05:41,270 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 33 states. [2018-12-08 12:05:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:05:41,356 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2018-12-08 12:05:41,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-08 12:05:41,356 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1067 [2018-12-08 12:05:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:05:41,357 INFO L225 Difference]: With dead ends: 142 [2018-12-08 12:05:41,357 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 12:05:41,358 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-12-08 12:05:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 12:05:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 12:05:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 12:05:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 12:05:41,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1067 [2018-12-08 12:05:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:05:41,358 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 12:05:41,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-08 12:05:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 12:05:41,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 12:05:41,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 12:05:41,771 WARN L180 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2018-12-08 12:05:41,915 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 23 [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,917 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (< 8 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| fibonacci_~n) .cse0)) (or (< |fibonacci_#in~n| 9) (< 9 |fibonacci_#in~n|) (and (<= 9 fibonacci_~n) .cse0)) (or (< 2 |fibonacci_#in~n|) (<= 2 fibonacci_~n)))) [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point L20-4(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,918 INFO L444 ceAbstractionStarter]: At program point L20-6(line 20) the Hoare annotation is: (let ((.cse0 (<= 1 |fibonacci_#t~ret0|)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (<= |fibonacci_#t~ret0| 1) (< 3 |fibonacci_#in~n|)) (or (< |fibonacci_#in~n| 9) (and (<= |fibonacci_#t~ret0| 21) .cse0 (<= 9 fibonacci_~n) .cse1) (< 9 |fibonacci_#in~n|)) (or (<= |fibonacci_#t~ret0| 5) (< 6 |fibonacci_#in~n|)) (or (< 8 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| fibonacci_~n) .cse0 (<= |fibonacci_#t~ret0| 13) .cse1)) (or (< 2 |fibonacci_#in~n|) (<= 2 fibonacci_~n)) (or (< 5 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 3)) (or (< 7 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 8)) (or (< 4 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 2)))) [2018-12-08 12:05:41,918 INFO L448 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point L20-8(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point L20-9(line 20) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 12:05:41,919 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-12-08 12:05:41,919 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-12-08 12:05:41,919 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-12-08 12:05:41,920 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-12-08 12:05:41,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 12:05:41 BoogieIcfgContainer [2018-12-08 12:05:41,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 12:05:41,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 12:05:41,922 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 12:05:41,922 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 12:05:41,922 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 12:05:33" (3/4) ... [2018-12-08 12:05:41,925 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 12:05:41,930 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-08 12:05:41,930 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 12:05:41,930 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 12:05:41,933 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 12:05:41,933 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 12:05:41,933 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 12:05:41,959 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_16326791-1e02-4d45-a419-b676b3b78df7/bin-2019/uautomizer/witness.graphml [2018-12-08 12:05:41,959 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 12:05:41,959 INFO L168 Benchmark]: Toolchain (without parser) took 9070.54 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 668.5 MB). Free memory was 954.4 MB in the beginning and 1.2 GB in the end (delta: -210.3 MB). Peak memory consumption was 458.2 MB. Max. memory is 11.5 GB. [2018-12-08 12:05:41,960 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:05:41,960 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.09 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-08 12:05:41,960 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.02 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:05:41,961 INFO L168 Benchmark]: Boogie Preprocessor took 9.91 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:05:41,961 INFO L168 Benchmark]: RCFGBuilder took 164.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -151.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-12-08 12:05:41,961 INFO L168 Benchmark]: TraceAbstraction took 8727.82 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 559.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -69.3 MB). Peak memory consumption was 490.1 MB. Max. memory is 11.5 GB. [2018-12-08 12:05:41,962 INFO L168 Benchmark]: Witness Printer took 36.86 ms. Allocated memory is still 1.7 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:05:41,963 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 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.09 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.02 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.91 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 164.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -151.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8727.82 ms. Allocated memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: 559.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -69.3 MB). Peak memory consumption was 490.1 MB. Max. memory is 11.5 GB. * Witness Printer took 36.86 ms. Allocated memory is still 1.7 GB. Free memory is still 1.2 GB. There was no memory consumed. 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, 8.6s OverallTime, 20 OverallIterations, 109 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 586 SDtfs, 1998 SDslu, 3691 SDs, 0 SdLazy, 3299 SolverSat, 853 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4302 GetRequests, 3943 SyntacticMatches, 3 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=11, 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, 119 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 284 PreInvPairs, 402 NumberOfFragments, 138 HoareAnnotationTreeSize, 284 FomulaSimplifications, 1666 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1597 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 7304 NumberOfCodeBlocks, 7098 NumberOfCodeBlocksAsserted, 211 NumberOfCheckSat, 7269 ConstructedInterpolants, 0 QuantifiedInterpolants, 9777967 SizeOfPredicates, 48 NumberOfNonLiveVariables, 6248 ConjunctsInSsa, 640 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 114515/140970 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...