./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/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_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/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-aa41828 [2018-11-23 14:25:56,929 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 14:25:56,930 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 14:25:56,938 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 14:25:56,939 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 14:25:56,939 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 14:25:56,940 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 14:25:56,941 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 14:25:56,942 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 14:25:56,943 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 14:25:56,944 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 14:25:56,944 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 14:25:56,944 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 14:25:56,945 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 14:25:56,945 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 14:25:56,946 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 14:25:56,946 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 14:25:56,947 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 14:25:56,948 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 14:25:56,949 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 14:25:56,949 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 14:25:56,950 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 14:25:56,951 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 14:25:56,951 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 14:25:56,951 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 14:25:56,952 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 14:25:56,952 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 14:25:56,953 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 14:25:56,953 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 14:25:56,954 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 14:25:56,954 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 14:25:56,955 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 14:25:56,955 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 14:25:56,955 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 14:25:56,956 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 14:25:56,956 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 14:25:56,956 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-23 14:25:56,964 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 14:25:56,964 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 14:25:56,965 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 14:25:56,965 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 14:25:56,965 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 14:25:56,965 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 14:25:56,965 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 14:25:56,966 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 14:25:56,966 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 14:25:56,966 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 14:25:56,966 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 14:25:56,966 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 14:25:56,966 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 14:25:56,967 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 14:25:56,967 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 14:25:56,967 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 14:25:56,967 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 14:25:56,967 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 14:25:56,967 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 14:25:56,968 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 14:25:56,969 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 14:25:56,969 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 14:25:56,969 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 14:25:56,969 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 14:25:56,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 14:25:56,969 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 14:25:56,969 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 14:25:56,970 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 14:25:56,970 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 14:25:56,970 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 14:25:56,970 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 14:25:56,970 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 14:25:56,970 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_5df254fe-25d1-4180-824d-1e2da2f0ab35/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 [2018-11-23 14:25:56,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 14:25:57,003 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 14:25:57,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 14:25:57,007 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 14:25:57,007 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 14:25:57,008 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 14:25:57,052 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/data/2e874c1c1/8379fefab6254e86b2a60f24afce9fe8/FLAGea8b317ab [2018-11-23 14:25:57,442 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 14:25:57,442 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 14:25:57,446 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/data/2e874c1c1/8379fefab6254e86b2a60f24afce9fe8/FLAGea8b317ab [2018-11-23 14:25:57,454 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/data/2e874c1c1/8379fefab6254e86b2a60f24afce9fe8 [2018-11-23 14:25:57,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 14:25:57,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 14:25:57,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 14:25:57,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 14:25:57,461 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 14:25:57,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277df2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57, skipping insertion in model container [2018-11-23 14:25:57,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 14:25:57,480 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 14:25:57,582 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 14:25:57,584 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 14:25:57,594 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 14:25:57,602 INFO L195 MainTranslator]: Completed translation [2018-11-23 14:25:57,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57 WrapperNode [2018-11-23 14:25:57,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 14:25:57,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 14:25:57,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 14:25:57,603 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 14:25:57,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,614 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 14:25:57,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 14:25:57,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 14:25:57,620 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 14:25:57,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... [2018-11-23 14:25:57,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 14:25:57,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 14:25:57,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 14:25:57,635 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 14:25:57,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 14:25:57,725 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-23 14:25:57,725 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-23 14:25:57,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 14:25:57,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 14:25:57,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 14:25:57,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 14:25:57,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 14:25:57,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 14:25:57,846 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 14:25:57,846 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 14:25:57,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:57 BoogieIcfgContainer [2018-11-23 14:25:57,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 14:25:57,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 14:25:57,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 14:25:57,850 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 14:25:57,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:25:57" (1/3) ... [2018-11-23 14:25:57,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418ac28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:57, skipping insertion in model container [2018-11-23 14:25:57,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:25:57" (2/3) ... [2018-11-23 14:25:57,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418ac28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:57, skipping insertion in model container [2018-11-23 14:25:57,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:57" (3/3) ... [2018-11-23 14:25:57,853 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 14:25:57,862 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 14:25:57,870 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-23 14:25:57,884 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-23 14:25:57,911 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 14:25:57,911 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 14:25:57,911 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 14:25:57,912 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 14:25:57,912 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 14:25:57,912 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 14:25:57,912 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 14:25:57,912 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 14:25:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-23 14:25:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 14:25:57,932 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:25:57,933 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:25:57,935 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:25:57,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1707029017, now seen corresponding path program 1 times [2018-11-23 14:25:57,942 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:25:57,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:57,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:25:57,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:57,983 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:25:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:25:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 14:25:58,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 14:25:58,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 14:25:58,081 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:25:58,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 14:25:58,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 14:25:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 14:25:58,094 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2018-11-23 14:25:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:25:58,175 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-23 14:25:58,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 14:25:58,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-23 14:25:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:25:58,181 INFO L225 Difference]: With dead ends: 38 [2018-11-23 14:25:58,182 INFO L226 Difference]: Without dead ends: 25 [2018-11-23 14:25:58,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 14:25:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-23 14:25:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-23 14:25:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-23 14:25:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-11-23 14:25:58,207 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-11-23 14:25:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:25:58,208 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-11-23 14:25:58,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 14:25:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-11-23 14:25:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-23 14:25:58,209 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:25:58,209 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:25:58,210 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:25:58,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1378291933, now seen corresponding path program 1 times [2018-11-23 14:25:58,210 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:25:58,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:58,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:25:58,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:58,212 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:25:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:25:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 14:25:58,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 14:25:58,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-23 14:25:58,245 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:25:58,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 14:25:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 14:25:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 14:25:58,247 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2018-11-23 14:25:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:25:58,263 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-11-23 14:25:58,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 14:25:58,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-23 14:25:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:25:58,265 INFO L225 Difference]: With dead ends: 27 [2018-11-23 14:25:58,266 INFO L226 Difference]: Without dead ends: 25 [2018-11-23 14:25:58,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 14:25:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-23 14:25:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-23 14:25:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 14:25:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-23 14:25:58,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2018-11-23 14:25:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:25:58,272 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-23 14:25:58,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 14:25:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-23 14:25:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-23 14:25:58,273 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:25:58,274 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:25:58,274 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:25:58,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash -995069271, now seen corresponding path program 1 times [2018-11-23 14:25:58,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:25:58,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:58,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:25:58,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:58,276 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:25:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:25:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-23 14:25:58,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:25:58,351 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:25:58,351 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-11-23 14:25:58,353 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] [2018-11-23 14:25:58,376 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 14:25:58,376 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 14:25:58,638 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 14:25:58,639 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. [2018-11-23 14:25:58,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:58,643 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 14:25:58,673 INFO L227 lantSequenceWeakener]: Weakened 11 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 14:25:58,674 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 14:25:58,706 INFO L415 sIntCurrentIteration]: We unified 31 AI predicates to 31 [2018-11-23 14:25:58,706 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 14:25:58,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 14:25:58,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-11-23 14:25:58,707 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:25:58,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 14:25:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 14:25:58,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-23 14:25:58,708 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2018-11-23 14:25:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:25:59,111 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2018-11-23 14:25:59,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 14:25:59,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-11-23 14:25:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:25:59,112 INFO L225 Difference]: With dead ends: 91 [2018-11-23 14:25:59,112 INFO L226 Difference]: Without dead ends: 72 [2018-11-23 14:25:59,114 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-23 14:25:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-23 14:25:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2018-11-23 14:25:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-23 14:25:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2018-11-23 14:25:59,122 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 32 [2018-11-23 14:25:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:25:59,123 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2018-11-23 14:25:59,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 14:25:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2018-11-23 14:25:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-23 14:25:59,124 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:25:59,124 INFO L402 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] [2018-11-23 14:25:59,124 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:25:59,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1617198389, now seen corresponding path program 2 times [2018-11-23 14:25:59,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:25:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:59,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:25:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:59,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:25:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:25:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 14:25:59,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:25:59,195 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:25:59,195 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:25:59,196 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:25:59,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:25:59,196 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:25:59,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 14:25:59,202 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 14:25:59,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 14:25:59,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:25:59,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:25:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-23 14:25:59,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:25:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-23 14:25:59,320 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 14:25:59,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2018-11-23 14:25:59,320 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:25:59,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 14:25:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 14:25:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 14:25:59,321 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 5 states. [2018-11-23 14:25:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:25:59,342 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2018-11-23 14:25:59,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 14:25:59,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-11-23 14:25:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:25:59,343 INFO L225 Difference]: With dead ends: 81 [2018-11-23 14:25:59,343 INFO L226 Difference]: Without dead ends: 80 [2018-11-23 14:25:59,344 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 14:25:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-23 14:25:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2018-11-23 14:25:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-23 14:25:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2018-11-23 14:25:59,351 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 38 [2018-11-23 14:25:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:25:59,351 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2018-11-23 14:25:59,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 14:25:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2018-11-23 14:25:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 14:25:59,352 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:25:59,352 INFO L402 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] [2018-11-23 14:25:59,352 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:25:59,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:59,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1406457547, now seen corresponding path program 1 times [2018-11-23 14:25:59,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:25:59,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:59,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:25:59,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:25:59,353 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:25:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:25:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 14:25:59,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:25:59,409 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:25:59,409 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-11-23 14:25:59,409 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] [2018-11-23 14:25:59,410 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 14:25:59,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 14:25:59,507 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 14:25:59,508 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. [2018-11-23 14:25:59,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:25:59,518 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 14:25:59,534 INFO L227 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 14:25:59,534 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 14:25:59,596 INFO L415 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-11-23 14:25:59,596 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 14:25:59,596 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 14:25:59,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-23 14:25:59,596 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:25:59,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 14:25:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 14:25:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-23 14:25:59,597 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 11 states. [2018-11-23 14:26:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:00,117 INFO L93 Difference]: Finished difference Result 153 states and 187 transitions. [2018-11-23 14:26:00,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 14:26:00,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2018-11-23 14:26:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:00,118 INFO L225 Difference]: With dead ends: 153 [2018-11-23 14:26:00,118 INFO L226 Difference]: Without dead ends: 97 [2018-11-23 14:26:00,119 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-11-23 14:26:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-23 14:26:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2018-11-23 14:26:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-23 14:26:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2018-11-23 14:26:00,129 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 39 [2018-11-23 14:26:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:00,129 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2018-11-23 14:26:00,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 14:26:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2018-11-23 14:26:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-23 14:26:00,130 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:00,130 INFO L402 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:00,131 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:00,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1228913769, now seen corresponding path program 2 times [2018-11-23 14:26:00,131 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:00,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:00,132 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-11-23 14:26:00,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:00,185 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:00,185 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:00,185 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:00,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:00,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:00,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 14:26:00,192 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 14:26:00,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 14:26:00,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:00,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-11-23 14:26:00,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-11-23 14:26:00,275 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-23 14:26:00,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2018-11-23 14:26:00,276 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:26:00,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 14:26:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 14:26:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 14:26:00,276 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 5 states. [2018-11-23 14:26:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:00,293 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2018-11-23 14:26:00,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 14:26:00,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2018-11-23 14:26:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:00,295 INFO L225 Difference]: With dead ends: 104 [2018-11-23 14:26:00,296 INFO L226 Difference]: Without dead ends: 103 [2018-11-23 14:26:00,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 14:26:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-23 14:26:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2018-11-23 14:26:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-23 14:26:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2018-11-23 14:26:00,305 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 45 [2018-11-23 14:26:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:00,306 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2018-11-23 14:26:00,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 14:26:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2018-11-23 14:26:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-23 14:26:00,307 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:00,307 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:00,307 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:00,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1240405343, now seen corresponding path program 1 times [2018-11-23 14:26:00,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:00,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:00,308 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-23 14:26:00,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:00,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:00,365 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-23 14:26:00,365 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] [2018-11-23 14:26:00,366 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 14:26:00,366 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 14:26:00,785 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 14:26:00,786 INFO L272 AbstractInterpreter]: Visited 23 different actions 2706 times. Merged at 9 different actions 767 times. Widened at 2 different actions 134 times. Performed 6647 root evaluator evaluations with a maximum evaluation depth of 4. Performed 6647 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 179 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-23 14:26:00,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:00,796 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 14:26:00,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:00,797 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:00,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:00,814 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 14:26:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:00,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 14:26:00,901 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 14:26:01,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:01,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 24 [2018-11-23 14:26:01,020 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:01,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 14:26:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 14:26:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2018-11-23 14:26:01,021 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand 15 states. [2018-11-23 14:26:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:01,216 INFO L93 Difference]: Finished difference Result 186 states and 238 transitions. [2018-11-23 14:26:01,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 14:26:01,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2018-11-23 14:26:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:01,218 INFO L225 Difference]: With dead ends: 186 [2018-11-23 14:26:01,218 INFO L226 Difference]: Without dead ends: 104 [2018-11-23 14:26:01,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2018-11-23 14:26:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-23 14:26:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2018-11-23 14:26:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-23 14:26:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2018-11-23 14:26:01,229 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 45 [2018-11-23 14:26:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:01,229 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2018-11-23 14:26:01,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 14:26:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2018-11-23 14:26:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-23 14:26:01,230 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:01,230 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:01,230 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:01,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:01,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1942973709, now seen corresponding path program 1 times [2018-11-23 14:26:01,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:01,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:01,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:01,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:01,232 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-11-23 14:26:01,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 14:26:01,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 14:26:01,278 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 14:26:01,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 14:26:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 14:26:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 14:26:01,279 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 5 states. [2018-11-23 14:26:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:01,312 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2018-11-23 14:26:01,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 14:26:01,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2018-11-23 14:26:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:01,313 INFO L225 Difference]: With dead ends: 121 [2018-11-23 14:26:01,313 INFO L226 Difference]: Without dead ends: 120 [2018-11-23 14:26:01,314 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 14:26:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-23 14:26:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2018-11-23 14:26:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-23 14:26:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2018-11-23 14:26:01,322 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 46 [2018-11-23 14:26:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:01,323 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2018-11-23 14:26:01,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 14:26:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2018-11-23 14:26:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-23 14:26:01,324 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:01,324 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:01,324 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:01,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1616531980, now seen corresponding path program 1 times [2018-11-23 14:26:01,325 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:01,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:01,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:01,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:01,326 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 34 proven. 18 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-23 14:26:01,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:01,402 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:01,402 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 66 with the following transitions: [2018-11-23 14:26:01,403 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] [2018-11-23 14:26:01,404 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 14:26:01,404 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 14:26:17,248 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 14:26:17,248 INFO L272 AbstractInterpreter]: Visited 25 different actions 189769 times. Merged at 11 different actions 64643 times. Widened at 2 different actions 7475 times. Performed 485011 root evaluator evaluations with a maximum evaluation depth of 4. Performed 485011 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 17153 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-23 14:26:17,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:17,252 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 14:26:17,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:17,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:17,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:17,259 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 14:26:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:17,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 58 proven. 48 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-23 14:26:17,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 107 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-23 14:26:17,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:17,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 24 [2018-11-23 14:26:17,510 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:17,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 14:26:17,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 14:26:17,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2018-11-23 14:26:17,511 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand 16 states. [2018-11-23 14:26:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:17,763 INFO L93 Difference]: Finished difference Result 200 states and 257 transitions. [2018-11-23 14:26:17,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 14:26:17,763 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-11-23 14:26:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:17,764 INFO L225 Difference]: With dead ends: 200 [2018-11-23 14:26:17,764 INFO L226 Difference]: Without dead ends: 111 [2018-11-23 14:26:17,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 14:26:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-23 14:26:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2018-11-23 14:26:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-23 14:26:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2018-11-23 14:26:17,772 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 65 [2018-11-23 14:26:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:17,772 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2018-11-23 14:26:17,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 14:26:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2018-11-23 14:26:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-23 14:26:17,773 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:17,773 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 7, 7, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:17,773 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:17,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1954123448, now seen corresponding path program 2 times [2018-11-23 14:26:17,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:17,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:17,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:17,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:17,775 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-11-23 14:26:17,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:17,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:17,819 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:17,819 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:17,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:17,819 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:17,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 14:26:17,828 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 14:26:17,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 14:26:17,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:17,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-11-23 14:26:17,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2018-11-23 14:26:17,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:17,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2018-11-23 14:26:17,979 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:17,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 14:26:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 14:26:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-23 14:26:17,980 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 9 states. [2018-11-23 14:26:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:18,018 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2018-11-23 14:26:18,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 14:26:18,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2018-11-23 14:26:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:18,020 INFO L225 Difference]: With dead ends: 135 [2018-11-23 14:26:18,020 INFO L226 Difference]: Without dead ends: 134 [2018-11-23 14:26:18,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-11-23 14:26:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-23 14:26:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2018-11-23 14:26:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-23 14:26:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2018-11-23 14:26:18,029 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 77 [2018-11-23 14:26:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:18,029 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2018-11-23 14:26:18,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 14:26:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2018-11-23 14:26:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-23 14:26:18,031 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:18,031 INFO L402 BasicCegarLoop]: trace histogram [17, 14, 11, 10, 10, 10, 10, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:18,031 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:18,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash 13910596, now seen corresponding path program 3 times [2018-11-23 14:26:18,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:18,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:18,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:18,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:18,033 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 123 proven. 200 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2018-11-23 14:26:18,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:18,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:18,124 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:18,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:18,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:18,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:18,131 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 14:26:18,131 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 14:26:18,149 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 14:26:18,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:18,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 346 proven. 121 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-11-23 14:26:18,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 63 proven. 419 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2018-11-23 14:26:18,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:18,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 17] total 25 [2018-11-23 14:26:18,463 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:18,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 14:26:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 14:26:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2018-11-23 14:26:18,464 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand 20 states. [2018-11-23 14:26:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:18,769 INFO L93 Difference]: Finished difference Result 253 states and 335 transitions. [2018-11-23 14:26:18,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-23 14:26:18,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2018-11-23 14:26:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:18,772 INFO L225 Difference]: With dead ends: 253 [2018-11-23 14:26:18,772 INFO L226 Difference]: Without dead ends: 151 [2018-11-23 14:26:18,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 270 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 14:26:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-23 14:26:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2018-11-23 14:26:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-23 14:26:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2018-11-23 14:26:18,781 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 144 [2018-11-23 14:26:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:18,781 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2018-11-23 14:26:18,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 14:26:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2018-11-23 14:26:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-23 14:26:18,782 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:18,782 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:18,782 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:18,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:18,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1659895493, now seen corresponding path program 4 times [2018-11-23 14:26:18,783 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:18,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:18,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:18,784 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-23 14:26:18,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:18,881 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:18,881 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:18,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:18,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:18,881 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:18,896 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 14:26:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:18,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 31 proven. 228 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-23 14:26:19,033 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 31 proven. 228 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-11-23 14:26:19,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:19,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 24 [2018-11-23 14:26:19,197 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:19,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 14:26:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 14:26:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2018-11-23 14:26:19,198 INFO L87 Difference]: Start difference. First operand 138 states and 173 transitions. Second operand 23 states. [2018-11-23 14:26:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:19,756 INFO L93 Difference]: Finished difference Result 462 states and 802 transitions. [2018-11-23 14:26:19,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 14:26:19,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2018-11-23 14:26:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:19,763 INFO L225 Difference]: With dead ends: 462 [2018-11-23 14:26:19,763 INFO L226 Difference]: Without dead ends: 342 [2018-11-23 14:26:19,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 173 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 14:26:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2018-11-23 14:26:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 297. [2018-11-23 14:26:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-11-23 14:26:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 461 transitions. [2018-11-23 14:26:19,786 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 461 transitions. Word has length 97 [2018-11-23 14:26:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:19,786 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 461 transitions. [2018-11-23 14:26:19,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 14:26:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 461 transitions. [2018-11-23 14:26:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-23 14:26:19,788 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:19,788 INFO L402 BasicCegarLoop]: trace histogram [25, 20, 16, 16, 16, 16, 15, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:19,788 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:19,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:19,788 INFO L82 PathProgramCache]: Analyzing trace with hash -42663960, now seen corresponding path program 5 times [2018-11-23 14:26:19,788 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:19,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:19,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:19,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:19,789 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 322 proven. 585 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-11-23 14:26:19,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:19,980 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:19,980 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:19,980 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:19,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:19,981 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:19,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 14:26:19,986 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 14:26:20,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-23 14:26:20,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:20,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 694 proven. 10 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-11-23 14:26:20,130 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 202 proven. 96 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2018-11-23 14:26:20,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:20,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 31 [2018-11-23 14:26:20,612 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:20,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-23 14:26:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-23 14:26:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2018-11-23 14:26:20,613 INFO L87 Difference]: Start difference. First operand 297 states and 461 transitions. Second operand 28 states. [2018-11-23 14:26:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:21,222 INFO L93 Difference]: Finished difference Result 427 states and 661 transitions. [2018-11-23 14:26:21,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-23 14:26:21,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 206 [2018-11-23 14:26:21,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:21,223 INFO L225 Difference]: With dead ends: 427 [2018-11-23 14:26:21,223 INFO L226 Difference]: Without dead ends: 148 [2018-11-23 14:26:21,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 402 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1097, Invalid=3063, Unknown=0, NotChecked=0, Total=4160 [2018-11-23 14:26:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-11-23 14:26:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2018-11-23 14:26:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-23 14:26:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2018-11-23 14:26:21,232 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 206 [2018-11-23 14:26:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:21,233 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2018-11-23 14:26:21,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-23 14:26:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2018-11-23 14:26:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-23 14:26:21,234 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:21,234 INFO L402 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:21,234 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:21,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1128501564, now seen corresponding path program 6 times [2018-11-23 14:26:21,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:21,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:21,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:21,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:21,235 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-11-23 14:26:21,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:21,308 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:21,308 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:21,308 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:21,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:21,308 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:21,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 14:26:21,315 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 14:26:21,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 14:26:21,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:21,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-11-23 14:26:21,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2018-11-23 14:26:21,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:21,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 19 [2018-11-23 14:26:21,631 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:21,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 14:26:21,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 14:26:21,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2018-11-23 14:26:21,631 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand 13 states. [2018-11-23 14:26:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:21,667 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2018-11-23 14:26:21,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 14:26:21,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 116 [2018-11-23 14:26:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:21,668 INFO L225 Difference]: With dead ends: 137 [2018-11-23 14:26:21,668 INFO L226 Difference]: Without dead ends: 136 [2018-11-23 14:26:21,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 223 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2018-11-23 14:26:21,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-11-23 14:26:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2018-11-23 14:26:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-23 14:26:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2018-11-23 14:26:21,674 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 116 [2018-11-23 14:26:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:21,674 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2018-11-23 14:26:21,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 14:26:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2018-11-23 14:26:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-23 14:26:21,675 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:21,675 INFO L402 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:21,675 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:21,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash -623810062, now seen corresponding path program 1 times [2018-11-23 14:26:21,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:21,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:21,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:21,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:21,676 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-23 14:26:21,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:21,726 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:21,727 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 118 with the following transitions: [2018-11-23 14:26:21,727 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] [2018-11-23 14:26:21,728 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 14:26:21,728 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 14:26:34,812 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 14:26:34,812 INFO L272 AbstractInterpreter]: Visited 25 different actions 189857 times. Merged at 11 different actions 64731 times. Widened at 2 different actions 7475 times. Performed 485427 root evaluator evaluations with a maximum evaluation depth of 4. Performed 485427 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 17153 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-23 14:26:34,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:34,813 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 14:26:34,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:34,813 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:34,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:34,820 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 14:26:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:34,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 30 proven. 44 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-11-23 14:26:34,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2018-11-23 14:26:35,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:35,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 13] total 21 [2018-11-23 14:26:35,084 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:35,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 14:26:35,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 14:26:35,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2018-11-23 14:26:35,085 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand 15 states. [2018-11-23 14:26:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:35,124 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2018-11-23 14:26:35,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 14:26:35,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2018-11-23 14:26:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:35,126 INFO L225 Difference]: With dead ends: 135 [2018-11-23 14:26:35,126 INFO L226 Difference]: Without dead ends: 133 [2018-11-23 14:26:35,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 216 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2018-11-23 14:26:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-23 14:26:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-23 14:26:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-23 14:26:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2018-11-23 14:26:35,130 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 117 [2018-11-23 14:26:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:35,130 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2018-11-23 14:26:35,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 14:26:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2018-11-23 14:26:35,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-23 14:26:35,131 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:35,131 INFO L402 BasicCegarLoop]: trace histogram [19, 16, 14, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:35,132 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:35,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1226786477, now seen corresponding path program 7 times [2018-11-23 14:26:35,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:35,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:35,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:35,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:35,133 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-23 14:26:35,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:35,226 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:35,227 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:35,227 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:35,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:35,227 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:35,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:35,234 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 14:26:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:35,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-23 14:26:35,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 144 proven. 122 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-11-23 14:26:35,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:35,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 26 [2018-11-23 14:26:35,839 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:35,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 14:26:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 14:26:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2018-11-23 14:26:35,840 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand 17 states. [2018-11-23 14:26:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:35,871 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2018-11-23 14:26:35,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 14:26:35,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 169 [2018-11-23 14:26:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:35,873 INFO L225 Difference]: With dead ends: 134 [2018-11-23 14:26:35,873 INFO L226 Difference]: Without dead ends: 133 [2018-11-23 14:26:35,873 INFO L631 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 [2018-11-23 14:26:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-23 14:26:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-23 14:26:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-23 14:26:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2018-11-23 14:26:35,879 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 169 [2018-11-23 14:26:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:35,879 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2018-11-23 14:26:35,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 14:26:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2018-11-23 14:26:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-23 14:26:35,880 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:35,880 INFO L402 BasicCegarLoop]: trace histogram [28, 24, 23, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:35,880 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:35,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -333231388, now seen corresponding path program 8 times [2018-11-23 14:26:35,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:35,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:35,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:35,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:35,881 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-23 14:26:36,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:36,042 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:36,042 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:36,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:36,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:36,043 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:36,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 14:26:36,053 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 14:26:36,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-11-23 14:26:36,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:36,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-23 14:26:36,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 429 proven. 355 refuted. 0 times theorem prover too weak. 1543 trivial. 0 not checked. [2018-11-23 14:26:37,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:37,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 33 [2018-11-23 14:26:37,857 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:37,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 14:26:37,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 14:26:37,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2018-11-23 14:26:37,857 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 21 states. [2018-11-23 14:26:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:37,908 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2018-11-23 14:26:37,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 14:26:37,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 261 [2018-11-23 14:26:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:37,909 INFO L225 Difference]: With dead ends: 134 [2018-11-23 14:26:37,909 INFO L226 Difference]: Without dead ends: 133 [2018-11-23 14:26:37,910 INFO L631 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 [2018-11-23 14:26:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-23 14:26:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-23 14:26:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-23 14:26:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2018-11-23 14:26:37,915 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 261 [2018-11-23 14:26:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:37,915 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2018-11-23 14:26:37,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 14:26:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2018-11-23 14:26:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-23 14:26:37,917 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:37,917 INFO L402 BasicCegarLoop]: trace histogram [43, 40, 35, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:37,918 INFO L423 AbstractCegarLoop]: === Iteration 18 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:37,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:37,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1881532310, now seen corresponding path program 9 times [2018-11-23 14:26:37,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:37,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:37,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:37,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:37,919 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-23 14:26:38,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:38,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:38,174 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:38,174 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:38,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:38,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 14:26:38,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 14:26:38,181 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 14:26:38,243 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 14:26:38,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:38,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-23 14:26:38,443 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 1149 proven. 996 refuted. 0 times theorem prover too weak. 3820 trivial. 0 not checked. [2018-11-23 14:26:41,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:41,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 29] total 40 [2018-11-23 14:26:41,824 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:41,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 14:26:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 14:26:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 14:26:41,826 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 25 states. [2018-11-23 14:26:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:41,877 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2018-11-23 14:26:41,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 14:26:41,877 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 412 [2018-11-23 14:26:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:41,878 INFO L225 Difference]: With dead ends: 134 [2018-11-23 14:26:41,878 INFO L226 Difference]: Without dead ends: 133 [2018-11-23 14:26:41,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 803 SyntacticMatches, 62 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 14:26:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-23 14:26:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-23 14:26:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-23 14:26:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-11-23 14:26:41,881 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 412 [2018-11-23 14:26:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:41,882 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-11-23 14:26:41,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 14:26:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-11-23 14:26:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-23 14:26:41,884 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:41,885 INFO L402 BasicCegarLoop]: trace histogram [68, 66, 55, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 32, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:41,885 INFO L423 AbstractCegarLoop]: === Iteration 19 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:41,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash 355145621, now seen corresponding path program 10 times [2018-11-23 14:26:41,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:41,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:41,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:26:41,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:41,886 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-23 14:26:42,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:42,245 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:42,245 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:42,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:42,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:42,246 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/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 [2018-11-23 14:26:42,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:42,255 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 14:26:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:42,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-23 14:26:42,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:46,516 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:26:46,717 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:26:46,919 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:26:47,123 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:26:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 3029 proven. 2721 refuted. 0 times theorem prover too weak. 9928 trivial. 0 not checked. [2018-11-23 14:26:50,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:26:50,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 35] total 47 [2018-11-23 14:26:50,544 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:26:50,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-23 14:26:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-23 14:26:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1761, Unknown=0, NotChecked=0, Total=2256 [2018-11-23 14:26:50,545 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 29 states. [2018-11-23 14:26:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:26:50,628 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2018-11-23 14:26:50,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-23 14:26:50,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 661 [2018-11-23 14:26:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:26:50,630 INFO L225 Difference]: With dead ends: 134 [2018-11-23 14:26:50,630 INFO L226 Difference]: Without dead ends: 133 [2018-11-23 14:26:50,631 INFO L631 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 [2018-11-23 14:26:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-23 14:26:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-23 14:26:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-23 14:26:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2018-11-23 14:26:50,636 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 661 [2018-11-23 14:26:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:26:50,637 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2018-11-23 14:26:50,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-23 14:26:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2018-11-23 14:26:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-11-23 14:26:50,644 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 14:26:50,644 INFO L402 BasicCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:26:50,644 INFO L423 AbstractCegarLoop]: === Iteration 20 === [fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 14:26:50,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:26:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -642383590, now seen corresponding path program 11 times [2018-11-23 14:26:50,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 14:26:50,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:50,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:26:50,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:26:50,646 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 14:26:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:26:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-23 14:26:51,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:51,450 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 14:26:51,450 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 14:26:51,450 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 14:26:51,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:26:51,450 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/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 [2018-11-23 14:26:51,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 14:26:51,467 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 14:26:51,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-11-23 14:26:51,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 14:26:51,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:26:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-23 14:26:52,479 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 14:26:53,964 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:26:54,161 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:26:54,367 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:26:54,573 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:26:59,000 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:26:59,212 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:26:59,418 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:26:59,623 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:27:01,018 WARN L180 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-23 14:27:01,511 WARN L180 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-23 14:27:02,009 WARN L180 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-23 14:27:02,505 WARN L180 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-23 14:27:06,108 WARN L180 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:27:06,309 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-23 14:27:06,514 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:27:06,718 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-23 14:27:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 7863 proven. 7339 refuted. 0 times theorem prover too weak. 26211 trivial. 0 not checked. [2018-11-23 14:27:10,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 14:27:10,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 41] total 54 [2018-11-23 14:27:10,303 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 14:27:10,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-23 14:27:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-23 14:27:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=2328, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 14:27:10,305 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand 33 states. [2018-11-23 14:27:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:27:10,420 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2018-11-23 14:27:10,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-23 14:27:10,421 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1067 [2018-11-23 14:27:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 14:27:10,422 INFO L225 Difference]: With dead ends: 133 [2018-11-23 14:27:10,423 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 14:27:10,424 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2350 GetRequests, 2105 SyntacticMatches, 192 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5331 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=642, Invalid=2328, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 14:27:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 14:27:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 14:27:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 14:27:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 14:27:10,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1067 [2018-11-23 14:27:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 14:27:10,425 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 14:27:10,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-23 14:27:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 14:27:10,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 14:27:10,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 14:27:10,915 WARN L180 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2018-11-23 14:27:11,063 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-23 14:27:11,065 INFO L448 ceAbstractionStarter]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-23 14:27:11,066 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (< 9 |fibonacci_#in~n|))) (and (or (< 4 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| fibonacci_~n) .cse0)) (or (and (<= 7 fibonacci_~n) .cse0) (< |fibonacci_#in~n| 7) .cse1) (or (< 5 |fibonacci_#in~n|) (and (<= 5 fibonacci_~n) .cse0) (< |fibonacci_#in~n| 5)) (or (and (<= 6 fibonacci_~n) .cse0) (not (= |fibonacci_#in~n| 6))) (or (not (= |fibonacci_#in~n| 8)) (= fibonacci_~n 8)) (< 1 |fibonacci_#in~n|) (or (<= 9 fibonacci_~n) (< |fibonacci_#in~n| 9) .cse1))) [2018-11-23 14:27:11,066 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L448 ceAbstractionStarter]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L448 ceAbstractionStarter]: For program point L20-4(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L448 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,066 INFO L444 ceAbstractionStarter]: At program point L20-6(line 20) the Hoare annotation is: (let ((.cse2 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse0 (<= 2 |fibonacci_#t~ret0|)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (< 5 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 3) .cse0 (<= 5 fibonacci_~n) .cse1) (< |fibonacci_#in~n| 5)) (or (and (<= 2 fibonacci_~n) .cse1) (< 2 |fibonacci_#in~n|)) (or (< 3 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 1) .cse2 (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n 3))) (or (not (= |fibonacci_#in~n| 6)) (and (<= |fibonacci_#t~ret0| 5) (<= 6 fibonacci_~n) .cse0 .cse1)) (or (and (<= |fibonacci_#t~ret0| 8) .cse2 .cse0 .cse1) (not (= |fibonacci_#in~n| 7))) (or (< 4 |fibonacci_#in~n|) (and .cse2 (<= |fibonacci_#t~ret0| 2) (<= fibonacci_~n 4) .cse0) (< |fibonacci_#in~n| 4)) (or (and (<= |fibonacci_#t~ret0| 13) .cse2 .cse0 .cse1) (not (= |fibonacci_#in~n| 8))) (or (< |fibonacci_#in~n| 9) (and (<= |fibonacci_#t~ret0| 21) .cse2 .cse0 .cse1) (< 9 |fibonacci_#in~n|)))) [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point L20-8(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point L20-9(line 20) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 14:27:11,067 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-23 14:27:11,067 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (= main_~x~0 9) [2018-11-23 14:27:11,068 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-23 14:27:11,068 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-23 14:27:11,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:27:11 BoogieIcfgContainer [2018-11-23 14:27:11,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 14:27:11,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 14:27:11,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 14:27:11,070 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 14:27:11,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:57" (3/4) ... [2018-11-23 14:27:11,073 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 14:27:11,079 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-23 14:27:11,079 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 14:27:11,079 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 14:27:11,082 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 14:27:11,083 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 14:27:11,083 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 14:27:11,114 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5df254fe-25d1-4180-824d-1e2da2f0ab35/bin-2019/utaipan/witness.graphml [2018-11-23 14:27:11,114 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 14:27:11,115 INFO L168 Benchmark]: Toolchain (without parser) took 73658.97 ms. Allocated memory was 1.0 GB in the beginning and 5.3 GB in the end (delta: 4.3 GB). Free memory was 959.2 MB in the beginning and 3.4 GB in the end (delta: -2.4 GB). Peak memory consumption was 1.8 GB. Max. memory is 11.5 GB. [2018-11-23 14:27:11,116 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:11,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.97 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:11,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.99 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:11,116 INFO L168 Benchmark]: Boogie Preprocessor took 14.43 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:11,117 INFO L168 Benchmark]: RCFGBuilder took 212.49 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -155.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:11,117 INFO L168 Benchmark]: TraceAbstraction took 73222.56 ms. Allocated memory was 1.1 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 3.4 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. [2018-11-23 14:27:11,117 INFO L168 Benchmark]: Witness Printer took 44.29 ms. Allocated memory is still 5.3 GB. Free memory is still 3.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:11,119 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 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.97 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 16.99 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.43 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 212.49 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -155.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 73222.56 ms. Allocated memory was 1.1 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 3.4 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 11.5 GB. * Witness Printer took 44.29 ms. Allocated memory is still 5.3 GB. Free memory is still 3.4 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, 73.1s OverallTime, 20 OverallIterations, 109 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 620 SDtfs, 2322 SDslu, 3687 SDs, 0 SdLazy, 3184 SolverSat, 971 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 7839 GetRequests, 6873 SyntacticMatches, 479 SemanticMatches, 487 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13752 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=297occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 29.7s AbstIntTime, 5 AbstIntIterations, 2 AbstIntStrong, 0.8188405797101449 AbsIntWeakeningRatio, 0.4057971014492754 AbsIntAvgWeakeningVarsNumRemoved, 0.391304347826087 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 141 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 314 PreInvPairs, 376 NumberOfFragments, 240 HoareAnnotationTreeSize, 314 FomulaSimplifications, 278 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1182 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 36.6s InterpolantComputationTime, 7178 NumberOfCodeBlocks, 6898 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 10648 ConstructedInterpolants, 0 QuantifiedInterpolants, 14321095 SizeOfPredicates, 33 NumberOfNonLiveVariables, 6056 ConjunctsInSsa, 622 ConjunctsInUnsatCore, 50 InterpolantComputations, 7 PerfectInterpolantSequences, 172225/210906 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...