./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 08:53:57,043 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 08:53:57,045 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 08:53:57,053 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 08:53:57,053 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 08:53:57,054 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 08:53:57,055 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 08:53:57,056 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 08:53:57,057 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 08:53:57,057 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 08:53:57,058 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 08:53:57,058 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 08:53:57,059 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 08:53:57,060 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 08:53:57,061 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 08:53:57,061 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 08:53:57,062 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 08:53:57,063 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 08:53:57,065 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 08:53:57,066 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 08:53:57,066 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 08:53:57,067 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 08:53:57,069 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 08:53:57,069 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 08:53:57,069 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 08:53:57,070 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 08:53:57,071 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 08:53:57,071 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 08:53:57,072 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 08:53:57,073 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 08:53:57,073 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 08:53:57,074 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 08:53:57,074 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 08:53:57,074 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 08:53:57,075 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 08:53:57,075 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 08:53:57,075 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-18 08:53:57,085 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 08:53:57,086 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 08:53:57,086 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 08:53:57,086 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 08:53:57,086 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 08:53:57,086 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 08:53:57,087 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 08:53:57,088 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 08:53:57,088 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 08:53:57,089 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 08:53:57,089 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 08:53:57,090 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 08:53:57,090 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 08:53:57,091 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-18 08:53:57,116 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 08:53:57,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 08:53:57,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 08:53:57,130 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 08:53:57,130 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 08:53:57,131 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 08:53:57,173 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/data/c7f57f1fc/63e24d1c180844ce9b74a1f455c7182d/FLAGf7af32547 [2018-11-18 08:53:57,579 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 08:53:57,579 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 08:53:57,583 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/data/c7f57f1fc/63e24d1c180844ce9b74a1f455c7182d/FLAGf7af32547 [2018-11-18 08:53:57,591 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/data/c7f57f1fc/63e24d1c180844ce9b74a1f455c7182d [2018-11-18 08:53:57,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 08:53:57,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 08:53:57,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 08:53:57,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 08:53:57,598 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 08:53:57,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8be4c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57, skipping insertion in model container [2018-11-18 08:53:57,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 08:53:57,623 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 08:53:57,729 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 08:53:57,731 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 08:53:57,739 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 08:53:57,747 INFO L195 MainTranslator]: Completed translation [2018-11-18 08:53:57,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57 WrapperNode [2018-11-18 08:53:57,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 08:53:57,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 08:53:57,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 08:53:57,748 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 08:53:57,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 08:53:57,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 08:53:57,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 08:53:57,761 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 08:53:57,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... [2018-11-18 08:53:57,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 08:53:57,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 08:53:57,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 08:53:57,775 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 08:53:57,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 08:53:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-18 08:53:57,843 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-18 08:53:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 08:53:57,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 08:53:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 08:53:57,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 08:53:57,843 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 08:53:57,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 08:53:57,949 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 08:53:57,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:53:57 BoogieIcfgContainer [2018-11-18 08:53:57,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 08:53:57,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 08:53:57,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 08:53:57,951 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 08:53:57,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:53:57" (1/3) ... [2018-11-18 08:53:57,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7f5431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:53:57, skipping insertion in model container [2018-11-18 08:53:57,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:53:57" (2/3) ... [2018-11-18 08:53:57,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7f5431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:53:57, skipping insertion in model container [2018-11-18 08:53:57,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:53:57" (3/3) ... [2018-11-18 08:53:57,953 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 08:53:57,959 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 08:53:57,964 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-18 08:53:57,973 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-18 08:53:58,001 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 08:53:58,001 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 08:53:58,001 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 08:53:58,001 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 08:53:58,001 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 08:53:58,001 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 08:53:58,001 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 08:53:58,002 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 08:53:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-18 08:53:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 08:53:58,019 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:53:58,020 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:53:58,021 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:53:58,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:58,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1707029017, now seen corresponding path program 1 times [2018-11-18 08:53:58,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:53:58,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:53:58,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,064 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:53:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:53:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 08:53:58,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 08:53:58,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 08:53:58,134 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:53:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 08:53:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 08:53:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 08:53:58,148 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2018-11-18 08:53:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:53:58,227 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-18 08:53:58,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 08:53:58,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-18 08:53:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:53:58,234 INFO L225 Difference]: With dead ends: 38 [2018-11-18 08:53:58,234 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 08:53:58,236 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 08:53:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 08:53:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-18 08:53:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 08:53:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-11-18 08:53:58,260 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-11-18 08:53:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:53:58,260 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-11-18 08:53:58,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 08:53:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-11-18 08:53:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 08:53:58,261 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:53:58,261 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:53:58,262 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:53:58,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1378291933, now seen corresponding path program 1 times [2018-11-18 08:53:58,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:53:58,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:53:58,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,263 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:53:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:53:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 08:53:58,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 08:53:58,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 08:53:58,287 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:53:58,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 08:53:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 08:53:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 08:53:58,289 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2018-11-18 08:53:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:53:58,319 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-11-18 08:53:58,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 08:53:58,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 08:53:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:53:58,321 INFO L225 Difference]: With dead ends: 27 [2018-11-18 08:53:58,321 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 08:53:58,322 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 08:53:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 08:53:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-18 08:53:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 08:53:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-18 08:53:58,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2018-11-18 08:53:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:53:58,329 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-18 08:53:58,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 08:53:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-18 08:53:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 08:53:58,330 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:53:58,330 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:53:58,330 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:53:58,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:58,331 INFO L82 PathProgramCache]: Analyzing trace with hash -659152633, now seen corresponding path program 1 times [2018-11-18 08:53:58,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:53:58,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:53:58,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,332 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:53:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:53:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 08:53:58,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:53:58,401 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:53:58,402 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-18 08:53:58,404 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [14], [16], [18], [20], [21], [25], [26], [30], [40], [41], [42], [43], [44], [45], [46], [48] [2018-11-18 08:53:58,428 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 08:53:58,428 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 08:53:58,707 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 08:53:58,708 INFO L272 AbstractInterpreter]: Visited 22 different actions 405 times. Never merged. Widened at 2 different actions 25 times. Performed 807 root evaluator evaluations with a maximum evaluation depth of 4. Performed 807 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 20 fixpoints after 2 different actions. Largest state had 5 variables. [2018-11-18 08:53:58,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:58,713 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 08:53:58,745 INFO L227 lantSequenceWeakener]: Weakened 6 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 08:53:58,745 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 08:53:58,771 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-18 08:53:58,771 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 08:53:58,772 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 08:53:58,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-18 08:53:58,772 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:53:58,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 08:53:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 08:53:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 08:53:58,773 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2018-11-18 08:53:58,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:53:58,977 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2018-11-18 08:53:58,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 08:53:58,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-18 08:53:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:53:58,978 INFO L225 Difference]: With dead ends: 74 [2018-11-18 08:53:58,978 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 08:53:58,978 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 08:53:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 08:53:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-11-18 08:53:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 08:53:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2018-11-18 08:53:58,985 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 26 [2018-11-18 08:53:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:53:58,985 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2018-11-18 08:53:58,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 08:53:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2018-11-18 08:53:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 08:53:58,986 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:53:58,986 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:53:58,986 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:53:58,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash -995069271, now seen corresponding path program 2 times [2018-11-18 08:53:58,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:53:58,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:53:58,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:58,988 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:53:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:53:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 08:53:59,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:53:59,044 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:53:59,044 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:53:59,045 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:53:59,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:53:59,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:53:59,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:53:59,054 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 08:53:59,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 08:53:59,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:53:59,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:53:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 08:53:59,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:53:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 08:53:59,190 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 08:53:59,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2018-11-18 08:53:59,190 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:53:59,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 08:53:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 08:53:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 08:53:59,191 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 5 states. [2018-11-18 08:53:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:53:59,214 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2018-11-18 08:53:59,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 08:53:59,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-11-18 08:53:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:53:59,216 INFO L225 Difference]: With dead ends: 66 [2018-11-18 08:53:59,216 INFO L226 Difference]: Without dead ends: 65 [2018-11-18 08:53:59,217 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 08:53:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-18 08:53:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2018-11-18 08:53:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 08:53:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2018-11-18 08:53:59,225 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 32 [2018-11-18 08:53:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:53:59,227 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2018-11-18 08:53:59,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 08:53:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2018-11-18 08:53:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-18 08:53:59,228 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:53:59,228 INFO L375 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, 1] [2018-11-18 08:53:59,228 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:53:59,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash -782376275, now seen corresponding path program 1 times [2018-11-18 08:53:59,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:53:59,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:59,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:53:59,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:59,230 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:53:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:53:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 08:53:59,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:53:59,296 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:53:59,296 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2018-11-18 08:53:59,296 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [14], [16], [18], [20], [22], [23], [25], [26], [30], [40], [41], [42], [43], [44], [45], [46], [48] [2018-11-18 08:53:59,297 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 08:53:59,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 08:53:59,419 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 08:53:59,419 INFO L272 AbstractInterpreter]: Visited 23 different actions 415 times. Never merged. Widened at 2 different actions 25 times. Performed 827 root evaluator evaluations with a maximum evaluation depth of 4. Performed 827 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 20 fixpoints after 2 different actions. Largest state had 5 variables. [2018-11-18 08:53:59,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:59,430 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 08:53:59,443 INFO L227 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 08:53:59,444 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 08:53:59,496 INFO L415 sIntCurrentIteration]: We unified 32 AI predicates to 32 [2018-11-18 08:53:59,496 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 08:53:59,496 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 08:53:59,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-11-18 08:53:59,496 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:53:59,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 08:53:59,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 08:53:59,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-18 08:53:59,497 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 9 states. [2018-11-18 08:53:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:53:59,837 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2018-11-18 08:53:59,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 08:53:59,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-18 08:53:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:53:59,838 INFO L225 Difference]: With dead ends: 121 [2018-11-18 08:53:59,838 INFO L226 Difference]: Without dead ends: 80 [2018-11-18 08:53:59,839 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-18 08:53:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-18 08:53:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2018-11-18 08:53:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-18 08:53:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2018-11-18 08:53:59,849 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 33 [2018-11-18 08:53:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:53:59,849 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2018-11-18 08:53:59,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 08:53:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2018-11-18 08:53:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 08:53:59,851 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:53:59,851 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:53:59,851 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:53:59,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:53:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1406457547, now seen corresponding path program 2 times [2018-11-18 08:53:59,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:53:59,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:59,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:53:59,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:53:59,852 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:53:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:53:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 08:53:59,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:53:59,902 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:53:59,902 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:53:59,902 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:53:59,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:53:59,902 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:53:59,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:53:59,912 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 08:53:59,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 08:53:59,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:53:59,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:53:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-18 08:53:59,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-18 08:54:00,022 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 08:54:00,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2018-11-18 08:54:00,022 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:54:00,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 08:54:00,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 08:54:00,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 08:54:00,023 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 5 states. [2018-11-18 08:54:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:00,047 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2018-11-18 08:54:00,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 08:54:00,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-11-18 08:54:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:00,048 INFO L225 Difference]: With dead ends: 89 [2018-11-18 08:54:00,048 INFO L226 Difference]: Without dead ends: 88 [2018-11-18 08:54:00,049 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 08:54:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-18 08:54:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2018-11-18 08:54:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 08:54:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2018-11-18 08:54:00,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 39 [2018-11-18 08:54:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:00,059 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2018-11-18 08:54:00,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 08:54:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2018-11-18 08:54:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 08:54:00,060 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:00,060 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:00,060 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:00,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:00,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1417949121, now seen corresponding path program 1 times [2018-11-18 08:54:00,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:00,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:00,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:00,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:00,061 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 08:54:00,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:00,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:00,124 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-11-18 08:54:00,124 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [14], [16], [18], [20], [21], [25], [26], [30], [40], [41], [42], [43], [44], [45], [46], [48] [2018-11-18 08:54:00,125 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 08:54:00,125 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 08:54:00,572 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 08:54:00,573 INFO L272 AbstractInterpreter]: Visited 23 different actions 2698 times. Merged at 9 different actions 755 times. Widened at 2 different actions 134 times. Performed 6597 root evaluator evaluations with a maximum evaluation depth of 4. Performed 6597 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 183 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-18 08:54:00,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:00,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 08:54:00,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:00,582 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:00,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:00,595 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 08:54:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:00,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 08:54:00,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 08:54:00,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:00,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 20 [2018-11-18 08:54:00,787 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:00,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 08:54:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 08:54:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-11-18 08:54:00,788 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand 13 states. [2018-11-18 08:54:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:00,965 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2018-11-18 08:54:00,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 08:54:00,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2018-11-18 08:54:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:00,966 INFO L225 Difference]: With dead ends: 154 [2018-11-18 08:54:00,966 INFO L226 Difference]: Without dead ends: 87 [2018-11-18 08:54:00,967 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2018-11-18 08:54:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-18 08:54:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2018-11-18 08:54:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 08:54:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2018-11-18 08:54:00,977 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 39 [2018-11-18 08:54:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:00,977 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2018-11-18 08:54:00,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 08:54:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2018-11-18 08:54:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 08:54:00,978 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:00,978 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:00,978 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:00,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -734083887, now seen corresponding path program 1 times [2018-11-18 08:54:00,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:00,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:00,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:00,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:00,980 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-18 08:54:01,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 08:54:01,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 08:54:01,039 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 08:54:01,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 08:54:01,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 08:54:01,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 08:54:01,040 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 5 states. [2018-11-18 08:54:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:01,082 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2018-11-18 08:54:01,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 08:54:01,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2018-11-18 08:54:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:01,085 INFO L225 Difference]: With dead ends: 106 [2018-11-18 08:54:01,085 INFO L226 Difference]: Without dead ends: 105 [2018-11-18 08:54:01,085 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 08:54:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-18 08:54:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2018-11-18 08:54:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-18 08:54:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2018-11-18 08:54:01,091 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 40 [2018-11-18 08:54:01,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:01,091 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2018-11-18 08:54:01,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 08:54:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2018-11-18 08:54:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-18 08:54:01,093 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:01,093 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:01,093 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:01,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:01,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1444124818, now seen corresponding path program 1 times [2018-11-18 08:54:01,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:01,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:01,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:01,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:01,095 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-11-18 08:54:01,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:01,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:01,154 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 60 with the following transitions: [2018-11-18 08:54:01,154 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [14], [16], [18], [20], [21], [22], [24], [25], [26], [30], [40], [41], [42], [43], [44], [45], [46], [48] [2018-11-18 08:54:01,155 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 08:54:01,155 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 08:54:18,011 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 08:54:18,012 INFO L272 AbstractInterpreter]: Visited 25 different actions 189825 times. Merged at 11 different actions 64699 times. Widened at 2 different actions 7475 times. Performed 485281 root evaluator evaluations with a maximum evaluation depth of 4. Performed 485281 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 17153 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-18 08:54:18,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:18,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 08:54:18,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:18,018 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:18,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:18,024 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 08:54:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:18,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-18 08:54:18,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 08:54:18,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:18,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 22 [2018-11-18 08:54:18,208 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:18,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 08:54:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 08:54:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2018-11-18 08:54:18,208 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 14 states. [2018-11-18 08:54:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:18,419 INFO L93 Difference]: Finished difference Result 168 states and 219 transitions. [2018-11-18 08:54:18,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 08:54:18,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2018-11-18 08:54:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:18,420 INFO L225 Difference]: With dead ends: 168 [2018-11-18 08:54:18,420 INFO L226 Difference]: Without dead ends: 94 [2018-11-18 08:54:18,421 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2018-11-18 08:54:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-11-18 08:54:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2018-11-18 08:54:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-18 08:54:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2018-11-18 08:54:18,429 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 59 [2018-11-18 08:54:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:18,429 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2018-11-18 08:54:18,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 08:54:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2018-11-18 08:54:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-18 08:54:18,432 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:18,432 INFO L375 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] [2018-11-18 08:54:18,432 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:18,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:18,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1898281076, now seen corresponding path program 2 times [2018-11-18 08:54:18,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:18,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:18,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:18,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:18,433 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-18 08:54:18,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:18,485 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:18,485 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:18,485 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:18,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:18,485 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:18,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:54:18,492 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 08:54:18,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 08:54:18,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:18,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-18 08:54:18,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-11-18 08:54:18,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:18,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2018-11-18 08:54:18,657 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:18,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 08:54:18,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 08:54:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-18 08:54:18,658 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 9 states. [2018-11-18 08:54:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:18,689 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2018-11-18 08:54:18,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 08:54:18,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2018-11-18 08:54:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:18,690 INFO L225 Difference]: With dead ends: 120 [2018-11-18 08:54:18,690 INFO L226 Difference]: Without dead ends: 119 [2018-11-18 08:54:18,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-11-18 08:54:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-18 08:54:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-11-18 08:54:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-18 08:54:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2018-11-18 08:54:18,698 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 65 [2018-11-18 08:54:18,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:18,699 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2018-11-18 08:54:18,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 08:54:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2018-11-18 08:54:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-18 08:54:18,700 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:18,700 INFO L375 BasicCegarLoop]: trace histogram [13, 11, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:18,700 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:18,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash -782800990, now seen corresponding path program 3 times [2018-11-18 08:54:18,700 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:18,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:18,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:18,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:18,701 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 118 proven. 92 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-18 08:54:18,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:18,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:18,763 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:18,763 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:18,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:18,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:18,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 08:54:18,769 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 08:54:18,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 08:54:18,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:18,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 196 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-18 08:54:18,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 12 proven. 289 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-18 08:54:19,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:19,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 17] total 25 [2018-11-18 08:54:19,112 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:19,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 08:54:19,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 08:54:19,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2018-11-18 08:54:19,113 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand 20 states. [2018-11-18 08:54:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:19,461 INFO L93 Difference]: Finished difference Result 241 states and 331 transitions. [2018-11-18 08:54:19,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 08:54:19,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2018-11-18 08:54:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:19,463 INFO L225 Difference]: With dead ends: 241 [2018-11-18 08:54:19,463 INFO L226 Difference]: Without dead ends: 154 [2018-11-18 08:54:19,464 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 203 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2018-11-18 08:54:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-18 08:54:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2018-11-18 08:54:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-11-18 08:54:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 176 transitions. [2018-11-18 08:54:19,473 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 176 transitions. Word has length 110 [2018-11-18 08:54:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:19,474 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 176 transitions. [2018-11-18 08:54:19,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 08:54:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 176 transitions. [2018-11-18 08:54:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 08:54:19,475 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:19,475 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:19,476 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:19,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash 173475161, now seen corresponding path program 4 times [2018-11-18 08:54:19,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:19,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:19,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:19,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:19,477 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 156 proven. 187 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 08:54:19,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:19,717 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:19,717 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:19,717 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:19,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:19,717 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:19,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:19,724 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 08:54:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:19,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 203 proven. 155 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 08:54:19,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 157 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 08:54:20,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:20,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 22] total 27 [2018-11-18 08:54:20,005 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:20,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 08:54:20,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 08:54:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-11-18 08:54:20,006 INFO L87 Difference]: Start difference. First operand 141 states and 176 transitions. Second operand 24 states. [2018-11-18 08:54:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:20,785 INFO L93 Difference]: Finished difference Result 303 states and 385 transitions. [2018-11-18 08:54:20,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-18 08:54:20,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2018-11-18 08:54:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:20,788 INFO L225 Difference]: With dead ends: 303 [2018-11-18 08:54:20,788 INFO L226 Difference]: Without dead ends: 157 [2018-11-18 08:54:20,789 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 191 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=865, Invalid=2105, Unknown=0, NotChecked=0, Total=2970 [2018-11-18 08:54:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-11-18 08:54:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2018-11-18 08:54:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-18 08:54:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2018-11-18 08:54:20,805 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 103 [2018-11-18 08:54:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:20,807 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2018-11-18 08:54:20,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 08:54:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2018-11-18 08:54:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 08:54:20,808 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:20,808 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:20,809 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:20,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1659895493, now seen corresponding path program 5 times [2018-11-18 08:54:20,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:20,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:20,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:20,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:20,813 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-18 08:54:20,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:20,900 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:20,900 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:20,900 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:20,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:20,900 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:20,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:54:20,916 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 08:54:20,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 08:54:20,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:20,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2018-11-18 08:54:21,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-11-18 08:54:21,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:21,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2018-11-18 08:54:21,353 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:21,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 08:54:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 08:54:21,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2018-11-18 08:54:21,354 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand 19 states. [2018-11-18 08:54:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:21,739 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2018-11-18 08:54:21,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 08:54:21,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-18 08:54:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:21,740 INFO L225 Difference]: With dead ends: 182 [2018-11-18 08:54:21,740 INFO L226 Difference]: Without dead ends: 175 [2018-11-18 08:54:21,741 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2018-11-18 08:54:21,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-18 08:54:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2018-11-18 08:54:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-18 08:54:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2018-11-18 08:54:21,748 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 97 [2018-11-18 08:54:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:21,748 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2018-11-18 08:54:21,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 08:54:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2018-11-18 08:54:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-18 08:54:21,749 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:21,749 INFO L375 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] [2018-11-18 08:54:21,750 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:21,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1611838702, now seen corresponding path program 1 times [2018-11-18 08:54:21,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:21,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:21,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:21,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:21,751 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 77 proven. 57 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2018-11-18 08:54:21,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:21,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:21,812 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 117 with the following transitions: [2018-11-18 08:54:21,812 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [14], [16], [18], [20], [22], [23], [24], [25], [26], [30], [40], [41], [42], [43], [44], [45], [46], [48] [2018-11-18 08:54:21,813 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 08:54:21,813 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 08:54:34,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 08:54:34,764 INFO L272 AbstractInterpreter]: Visited 25 different actions 189953 times. Merged at 11 different actions 64827 times. Widened at 2 different actions 7475 times. Performed 485910 root evaluator evaluations with a maximum evaluation depth of 4. Performed 485910 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 17153 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-18 08:54:34,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:34,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 08:54:34,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:34,766 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:34,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:34,772 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 08:54:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:34,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 188 proven. 214 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-18 08:54:34,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 39 proven. 315 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-18 08:54:35,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:35,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 25 [2018-11-18 08:54:35,070 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:35,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 08:54:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 08:54:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2018-11-18 08:54:35,071 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand 23 states. [2018-11-18 08:54:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:35,347 INFO L93 Difference]: Finished difference Result 278 states and 321 transitions. [2018-11-18 08:54:35,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 08:54:35,347 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2018-11-18 08:54:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:35,348 INFO L225 Difference]: With dead ends: 278 [2018-11-18 08:54:35,348 INFO L226 Difference]: Without dead ends: 144 [2018-11-18 08:54:35,349 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 206 SyntacticMatches, 17 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=1079, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 08:54:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-18 08:54:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 132. [2018-11-18 08:54:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-18 08:54:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2018-11-18 08:54:35,354 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 116 [2018-11-18 08:54:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:35,354 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2018-11-18 08:54:35,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 08:54:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2018-11-18 08:54:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-18 08:54:35,355 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:35,355 INFO L375 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:35,355 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:35,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash -623810062, now seen corresponding path program 2 times [2018-11-18 08:54:35,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:35,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:35,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:35,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:35,356 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-18 08:54:35,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:35,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:35,397 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:35,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:35,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:35,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:35,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:54:35,411 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 08:54:35,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 08:54:35,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:35,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-18 08:54:35,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-18 08:54:35,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:35,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2018-11-18 08:54:35,529 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:35,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 08:54:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 08:54:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-18 08:54:35,530 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand 10 states. [2018-11-18 08:54:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:35,554 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2018-11-18 08:54:35,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 08:54:35,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 117 [2018-11-18 08:54:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:35,555 INFO L225 Difference]: With dead ends: 132 [2018-11-18 08:54:35,555 INFO L226 Difference]: Without dead ends: 130 [2018-11-18 08:54:35,555 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 226 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-11-18 08:54:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-18 08:54:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-18 08:54:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-18 08:54:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2018-11-18 08:54:35,560 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 117 [2018-11-18 08:54:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:35,561 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2018-11-18 08:54:35,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 08:54:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2018-11-18 08:54:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-18 08:54:35,564 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:35,564 INFO L375 BasicCegarLoop]: trace histogram [19, 16, 14, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:35,564 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:35,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1226786477, now seen corresponding path program 6 times [2018-11-18 08:54:35,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:35,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:35,565 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-18 08:54:35,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:35,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:35,676 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:35,676 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:35,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:35,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:35,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 08:54:35,686 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 08:54:35,713 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 08:54:35,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:35,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-18 08:54:35,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:36,167 WARN L180 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-18 08:54:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 144 proven. 122 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-11-18 08:54:36,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:36,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 26 [2018-11-18 08:54:36,659 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:36,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 08:54:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 08:54:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2018-11-18 08:54:36,660 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand 17 states. [2018-11-18 08:54:36,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:36,696 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2018-11-18 08:54:36,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 08:54:36,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 169 [2018-11-18 08:54:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:36,698 INFO L225 Difference]: With dead ends: 131 [2018-11-18 08:54:36,698 INFO L226 Difference]: Without dead ends: 130 [2018-11-18 08:54:36,698 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 325 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2018-11-18 08:54:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-18 08:54:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-18 08:54:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-18 08:54:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 141 transitions. [2018-11-18 08:54:36,703 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 141 transitions. Word has length 169 [2018-11-18 08:54:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:36,704 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 141 transitions. [2018-11-18 08:54:36,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 08:54:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 141 transitions. [2018-11-18 08:54:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-18 08:54:36,705 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:36,705 INFO L375 BasicCegarLoop]: trace histogram [28, 24, 23, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:36,706 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:36,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -333231388, now seen corresponding path program 7 times [2018-11-18 08:54:36,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:36,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:36,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:36,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:36,706 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-18 08:54:36,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:36,844 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:36,844 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:36,844 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:36,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:36,844 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:36,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:36,851 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 08:54:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:36,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-18 08:54:36,954 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 429 proven. 355 refuted. 0 times theorem prover too weak. 1543 trivial. 0 not checked. [2018-11-18 08:54:38,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:38,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 33 [2018-11-18 08:54:38,307 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:38,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 08:54:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 08:54:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 08:54:38,308 INFO L87 Difference]: Start difference. First operand 130 states and 141 transitions. Second operand 21 states. [2018-11-18 08:54:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:38,369 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2018-11-18 08:54:38,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 08:54:38,370 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 261 [2018-11-18 08:54:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:38,371 INFO L225 Difference]: With dead ends: 131 [2018-11-18 08:54:38,371 INFO L226 Difference]: Without dead ends: 130 [2018-11-18 08:54:38,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 505 SyntacticMatches, 33 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 08:54:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-18 08:54:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-18 08:54:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-18 08:54:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2018-11-18 08:54:38,376 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 261 [2018-11-18 08:54:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:38,377 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2018-11-18 08:54:38,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 08:54:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2018-11-18 08:54:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-18 08:54:38,378 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:38,378 INFO L375 BasicCegarLoop]: trace histogram [43, 40, 35, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:38,378 INFO L423 AbstractCegarLoop]: === Iteration 18 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:38,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1881532310, now seen corresponding path program 8 times [2018-11-18 08:54:38,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:38,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:38,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:38,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:38,379 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-18 08:54:38,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:38,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:38,615 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:38,615 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:38,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:38,615 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:38,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:54:38,621 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 08:54:38,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-11-18 08:54:38,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:38,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-18 08:54:38,831 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 1149 proven. 996 refuted. 0 times theorem prover too weak. 3820 trivial. 0 not checked. [2018-11-18 08:54:42,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:42,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 29] total 40 [2018-11-18 08:54:42,135 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:42,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 08:54:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 08:54:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 08:54:42,136 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand 25 states. [2018-11-18 08:54:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:42,202 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2018-11-18 08:54:42,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 08:54:42,203 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 412 [2018-11-18 08:54:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:42,203 INFO L225 Difference]: With dead ends: 131 [2018-11-18 08:54:42,203 INFO L226 Difference]: Without dead ends: 130 [2018-11-18 08:54:42,204 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 803 SyntacticMatches, 62 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 08:54:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-18 08:54:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-18 08:54:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-18 08:54:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2018-11-18 08:54:42,207 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 412 [2018-11-18 08:54:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:42,208 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2018-11-18 08:54:42,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 08:54:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2018-11-18 08:54:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-18 08:54:42,210 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:42,210 INFO L375 BasicCegarLoop]: trace histogram [68, 66, 55, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 32, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:42,210 INFO L423 AbstractCegarLoop]: === Iteration 19 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:42,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:42,211 INFO L82 PathProgramCache]: Analyzing trace with hash 355145621, now seen corresponding path program 9 times [2018-11-18 08:54:42,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:42,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:42,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:42,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:42,211 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-18 08:54:42,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:42,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:42,861 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:42,861 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:42,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:42,861 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:42,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 08:54:42,867 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 08:54:42,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 08:54:42,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:54:42,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-18 08:54:43,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:47,005 WARN L180 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:54:47,203 WARN L180 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:54:47,409 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:54:47,614 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:54:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 3029 proven. 2721 refuted. 0 times theorem prover too weak. 9928 trivial. 0 not checked. [2018-11-18 08:54:51,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:54:51,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 35] total 47 [2018-11-18 08:54:51,033 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:54:51,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 08:54:51,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 08:54:51,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1761, Unknown=0, NotChecked=0, Total=2256 [2018-11-18 08:54:51,035 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand 29 states. [2018-11-18 08:54:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:54:51,097 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2018-11-18 08:54:51,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 08:54:51,097 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 661 [2018-11-18 08:54:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:54:51,098 INFO L225 Difference]: With dead ends: 131 [2018-11-18 08:54:51,098 INFO L226 Difference]: Without dead ends: 130 [2018-11-18 08:54:51,099 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1454 GetRequests, 1297 SyntacticMatches, 111 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2975 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=495, Invalid=1761, Unknown=0, NotChecked=0, Total=2256 [2018-11-18 08:54:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-18 08:54:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-18 08:54:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-18 08:54:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2018-11-18 08:54:51,102 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 661 [2018-11-18 08:54:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:54:51,103 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2018-11-18 08:54:51,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 08:54:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2018-11-18 08:54:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-11-18 08:54:51,108 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 08:54:51,108 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:54:51,108 INFO L423 AbstractCegarLoop]: === Iteration 20 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 08:54:51,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:54:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash -642383590, now seen corresponding path program 10 times [2018-11-18 08:54:51,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 08:54:51,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:51,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:54:51,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:54:51,110 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 08:54:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-18 08:54:51,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:51,958 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 08:54:51,958 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 08:54:51,958 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 08:54:51,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:54:51,958 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:54:51,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:54:51,969 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 08:54:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:54:52,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:54:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-18 08:54:52,787 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 08:54:54,283 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:54:54,491 WARN L180 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:54:54,701 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:54:54,905 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:54:59,376 WARN L180 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:54:59,577 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:54:59,785 WARN L180 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:54:59,994 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:55:01,370 WARN L180 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-18 08:55:01,860 WARN L180 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-18 08:55:02,352 WARN L180 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-18 08:55:02,847 WARN L180 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-18 08:55:06,444 WARN L180 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:55:06,641 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 08:55:06,848 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:55:07,053 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 08:55:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 7863 proven. 7339 refuted. 0 times theorem prover too weak. 26211 trivial. 0 not checked. [2018-11-18 08:55:10,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 08:55:10,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 41] total 54 [2018-11-18 08:55:10,584 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 08:55:10,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-18 08:55:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-18 08:55:10,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2328, Unknown=0, NotChecked=0, Total=2970 [2018-11-18 08:55:10,585 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 33 states. [2018-11-18 08:55:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:55:10,676 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2018-11-18 08:55:10,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 08:55:10,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1067 [2018-11-18 08:55:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 08:55:10,678 INFO L225 Difference]: With dead ends: 130 [2018-11-18 08:55:10,678 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 08:55:10,679 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2350 GetRequests, 2105 SyntacticMatches, 192 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=642, Invalid=2328, Unknown=0, NotChecked=0, Total=2970 [2018-11-18 08:55:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 08:55:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 08:55:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 08:55:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 08:55:10,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1067 [2018-11-18 08:55:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 08:55:10,680 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:55:10,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-18 08:55:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 08:55:10,680 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 08:55:10,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 08:55:11,292 WARN L180 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 49 [2018-11-18 08:55:11,457 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2018-11-18 08:55:11,458 INFO L425 ceAbstractionStarter]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (< 4 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| fibonacci_~n) .cse0)) (or (< 3 |fibonacci_#in~n|) (<= 2 fibonacci_~n)) (or (= fibonacci_~n 8) (not (= |fibonacci_#in~n| 8))) (or (< 6 |fibonacci_#in~n|) (and (<= 6 fibonacci_~n) .cse0) (< |fibonacci_#in~n| 6)) (or (< |fibonacci_#in~n| 9) (< 9 |fibonacci_#in~n|) (and (<= 9 fibonacci_~n) .cse0)) (or (and (<= 5 fibonacci_~n) .cse0) (or (< |fibonacci_#in~n| 5) (< 5 |fibonacci_#in~n|))) (or (not (= |fibonacci_#in~n| 7)) (and (<= 7 fibonacci_~n) .cse0)))) [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20-4(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L421 ceAbstractionStarter]: At program point L20-6(line 20) the Hoare annotation is: (and (or (<= |fibonacci_#t~ret0| 1) (< 3 |fibonacci_#in~n|)) (or (and (<= |fibonacci_#t~ret0| 21) (<= |fibonacci_#in~n| fibonacci_~n) (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n |fibonacci_#in~n|)) (< 9 |fibonacci_#in~n|)) (or (< 6 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 5)) (or (<= |fibonacci_#t~ret0| 13) (not (= |fibonacci_#in~n| 8))) (or (<= |fibonacci_#t~ret0| 3) (< 5 |fibonacci_#in~n|)) (< 1 |fibonacci_#in~n|) (or (<= |fibonacci_#t~ret0| 8) (not (= |fibonacci_#in~n| 7))) (or (< 4 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 2))) [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,459 INFO L425 ceAbstractionStarter]: For program point L20-8(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point L20-9(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 08:55:11,460 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (= main_~x~0 9) [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-18 08:55:11,460 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-18 08:55:11,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 08:55:11 BoogieIcfgContainer [2018-11-18 08:55:11,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 08:55:11,462 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 08:55:11,462 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 08:55:11,462 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 08:55:11,463 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:53:57" (3/4) ... [2018-11-18 08:55:11,466 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 08:55:11,470 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-18 08:55:11,470 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 08:55:11,470 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 08:55:11,473 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 08:55:11,473 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 08:55:11,473 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 08:55:11,508 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9fe0e119-e3ed-4dc7-a1ab-1d8503a5ae10/bin-2019/utaipan/witness.graphml [2018-11-18 08:55:11,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 08:55:11,509 INFO L168 Benchmark]: Toolchain (without parser) took 73915.50 ms. Allocated memory was 1.0 GB in the beginning and 5.3 GB in the end (delta: 4.3 GB). Free memory was 961.9 MB in the beginning and 2.5 GB in the end (delta: -1.5 GB). Peak memory consumption was 2.8 GB. Max. memory is 11.5 GB. [2018-11-18 08:55:11,509 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:55:11,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.16 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 08:55:11,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.32 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:55:11,510 INFO L168 Benchmark]: Boogie Preprocessor took 14.08 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 08:55:11,510 INFO L168 Benchmark]: RCFGBuilder took 174.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -175.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2018-11-18 08:55:11,511 INFO L168 Benchmark]: TraceAbstraction took 73512.46 ms. Allocated memory was 1.2 GB in the beginning and 5.3 GB in the end (delta: 4.2 GB). Free memory was 1.1 GB in the beginning and 2.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 11.5 GB. [2018-11-18 08:55:11,511 INFO L168 Benchmark]: Witness Printer took 46.19 ms. Allocated memory is still 5.3 GB. Free memory is still 2.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:55:11,512 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 153.16 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.32 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.08 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 174.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -175.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 73512.46 ms. Allocated memory was 1.2 GB in the beginning and 5.3 GB in the end (delta: 4.2 GB). Free memory was 1.1 GB in the beginning and 2.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 11.5 GB. * Witness Printer took 46.19 ms. Allocated memory is still 5.3 GB. Free memory is still 2.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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, 73.4s OverallTime, 20 OverallIterations, 109 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 598 SDtfs, 1970 SDslu, 3628 SDs, 0 SdLazy, 2972 SolverSat, 726 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 7489 GetRequests, 6523 SyntacticMatches, 486 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13579 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 30.7s AbstIntTime, 5 AbstIntIterations, 2 AbstIntStrong, 0.8333333333333334 AbsIntWeakeningRatio, 0.42105263157894735 AbsIntAvgWeakeningVarsNumRemoved, 0.2982456140350877 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 119 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 230 PreInvPairs, 297 NumberOfFragments, 169 HoareAnnotationTreeSize, 230 FomulaSimplifications, 967 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1859 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 36.1s InterpolantComputationTime, 6814 NumberOfCodeBlocks, 6604 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 10111 ConstructedInterpolants, 0 QuantifiedInterpolants, 14158417 SizeOfPredicates, 38 NumberOfNonLiveVariables, 5863 ConjunctsInSsa, 622 ConjunctsInUnsatCore, 50 InterpolantComputations, 7 PerfectInterpolantSequences, 167757/205945 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...