./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 16:01:01,787 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:01:01,788 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:01:01,795 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:01:01,796 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:01:01,796 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:01:01,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:01:01,798 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:01:01,799 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:01:01,800 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:01:01,801 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:01:01,801 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:01:01,802 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:01:01,802 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:01:01,803 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:01:01,804 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:01:01,805 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:01:01,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:01:01,807 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:01:01,809 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:01:01,810 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:01:01,810 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:01:01,812 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:01:01,812 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:01:01,813 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:01:01,813 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:01:01,814 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:01:01,814 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:01:01,815 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:01:01,815 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:01:01,815 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:01:01,817 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:01:01,817 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:01:01,817 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:01:01,818 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:01:01,818 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:01:01,818 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2018-11-18 16:01:01,827 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:01:01,828 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:01:01,828 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:01:01,828 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 16:01:01,829 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 16:01:01,829 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 16:01:01,829 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 16:01:01,829 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:01:01,829 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:01:01,829 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:01:01,830 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:01:01,831 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:01:01,831 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:01:01,831 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:01:01,832 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-18 16:01:01,854 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:01:01,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:01:01,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:01:01,866 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:01:01,866 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:01:01,866 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 16:01:01,901 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/data/58e697ccf/3b89340eff214739a4fbc469a50e3ad5/FLAG3eb9005e0 [2018-11-18 16:01:02,309 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:01:02,309 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 16:01:02,313 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/data/58e697ccf/3b89340eff214739a4fbc469a50e3ad5/FLAG3eb9005e0 [2018-11-18 16:01:02,323 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/data/58e697ccf/3b89340eff214739a4fbc469a50e3ad5 [2018-11-18 16:01:02,325 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:01:02,326 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 16:01:02,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:01:02,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:01:02,329 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:01:02,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3275144b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02, skipping insertion in model container [2018-11-18 16:01:02,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:01:02,349 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:01:02,453 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:01:02,456 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:01:02,465 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:01:02,473 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:01:02,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02 WrapperNode [2018-11-18 16:01:02,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:01:02,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:01:02,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:01:02,474 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:01:02,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... [2018-11-18 16:01:02,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:01:02,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:01:02,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:01:02,489 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:01:02,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:01:02,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:01:02,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:01:02,559 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-18 16:01:02,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:01:02,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 16:01:02,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 16:01:02,559 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-18 16:01:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:01:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:01:02,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:01:02,656 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:01:02,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:01:02 BoogieIcfgContainer [2018-11-18 16:01:02,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:01:02,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:01:02,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:01:02,660 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:01:02,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:01:02" (1/3) ... [2018-11-18 16:01:02,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df16224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:01:02, skipping insertion in model container [2018-11-18 16:01:02,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:01:02" (2/3) ... [2018-11-18 16:01:02,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df16224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:01:02, skipping insertion in model container [2018-11-18 16:01:02,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:01:02" (3/3) ... [2018-11-18 16:01:02,663 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 16:01:02,669 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:01:02,673 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-11-18 16:01:02,681 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-11-18 16:01:02,699 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 16:01:02,700 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:01:02,700 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:01:02,700 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:01:02,700 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:01:02,700 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:01:02,700 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:01:02,700 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:01:02,700 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:01:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2018-11-18 16:01:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 16:01:02,715 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:02,715 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:02,717 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:02,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1707029017, now seen corresponding path program 1 times [2018-11-18 16:01:02,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:02,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:02,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:02,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:02,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:01:02,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:01:02,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:01:02,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:01:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:01:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:01:02,839 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2018-11-18 16:01:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:02,911 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-18 16:01:02,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:01:02,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-18 16:01:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:02,920 INFO L225 Difference]: With dead ends: 38 [2018-11-18 16:01:02,920 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 16:01:02,922 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:01:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 16:01:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-18 16:01:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 16:01:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-11-18 16:01:02,946 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2018-11-18 16:01:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:02,946 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-11-18 16:01:02,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:01:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-11-18 16:01:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 16:01:02,948 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:02,948 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:02,948 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:02,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1378291933, now seen corresponding path program 1 times [2018-11-18 16:01:02,949 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:02,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:02,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:01:02,969 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:01:02,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 16:01:02,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 16:01:02,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 16:01:02,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:01:02,971 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2018-11-18 16:01:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:03,001 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-11-18 16:01:03,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 16:01:03,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 16:01:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:03,003 INFO L225 Difference]: With dead ends: 27 [2018-11-18 16:01:03,004 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 16:01:03,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 16:01:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 16:01:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-18 16:01:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 16:01:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-18 16:01:03,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2018-11-18 16:01:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:03,009 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-18 16:01:03,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 16:01:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-18 16:01:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 16:01:03,010 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:03,010 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:03,010 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:03,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -995069271, now seen corresponding path program 1 times [2018-11-18 16:01:03,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:03,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:03,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:03,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-18 16:01:03,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:03,079 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:03,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:03,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:01:03,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:03,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2018-11-18 16:01:03,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 16:01:03,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 16:01:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:01:03,217 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2018-11-18 16:01:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:03,420 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2018-11-18 16:01:03,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 16:01:03,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-11-18 16:01:03,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:03,422 INFO L225 Difference]: With dead ends: 78 [2018-11-18 16:01:03,422 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 16:01:03,423 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-11-18 16:01:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 16:01:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2018-11-18 16:01:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-18 16:01:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2018-11-18 16:01:03,434 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 32 [2018-11-18 16:01:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:03,435 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2018-11-18 16:01:03,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 16:01:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2018-11-18 16:01:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-18 16:01:03,436 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:03,436 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:03,437 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:03,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash 131544367, now seen corresponding path program 1 times [2018-11-18 16:01:03,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:03,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-18 16:01:03,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:01:03,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:01:03,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:01:03,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:01:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:01:03,490 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2018-11-18 16:01:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:03,541 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2018-11-18 16:01:03,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:01:03,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-11-18 16:01:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:03,543 INFO L225 Difference]: With dead ends: 78 [2018-11-18 16:01:03,543 INFO L226 Difference]: Without dead ends: 77 [2018-11-18 16:01:03,543 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:01:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-18 16:01:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2018-11-18 16:01:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 16:01:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2018-11-18 16:01:03,551 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 34 [2018-11-18 16:01:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:03,552 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2018-11-18 16:01:03,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:01:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2018-11-18 16:01:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 16:01:03,553 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:03,553 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:03,553 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:03,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:03,554 INFO L82 PathProgramCache]: Analyzing trace with hash -217091865, now seen corresponding path program 1 times [2018-11-18 16:01:03,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:03,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:03,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:03,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 16:01:03,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:03,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:03,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:03,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:01:03,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:03,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2018-11-18 16:01:03,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 16:01:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 16:01:03,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:01:03,724 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2018-11-18 16:01:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:03,983 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2018-11-18 16:01:03,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 16:01:03,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-11-18 16:01:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:03,984 INFO L225 Difference]: With dead ends: 115 [2018-11-18 16:01:03,984 INFO L226 Difference]: Without dead ends: 70 [2018-11-18 16:01:03,985 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2018-11-18 16:01:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-18 16:01:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2018-11-18 16:01:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-18 16:01:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2018-11-18 16:01:03,992 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 35 [2018-11-18 16:01:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:03,992 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2018-11-18 16:01:03,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 16:01:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2018-11-18 16:01:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-18 16:01:03,994 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:03,994 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:03,994 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:03,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1444124818, now seen corresponding path program 1 times [2018-11-18 16:01:03,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:03,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:03,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:03,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:03,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-11-18 16:01:04,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:04,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:04,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:04,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-18 16:01:04,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:04,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-18 16:01:04,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 16:01:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 16:01:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-11-18 16:01:04,164 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 14 states. [2018-11-18 16:01:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:04,378 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2018-11-18 16:01:04,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 16:01:04,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2018-11-18 16:01:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:04,380 INFO L225 Difference]: With dead ends: 136 [2018-11-18 16:01:04,380 INFO L226 Difference]: Without dead ends: 89 [2018-11-18 16:01:04,381 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2018-11-18 16:01:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-18 16:01:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-11-18 16:01:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-18 16:01:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2018-11-18 16:01:04,389 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 59 [2018-11-18 16:01:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:04,390 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2018-11-18 16:01:04,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 16:01:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2018-11-18 16:01:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-18 16:01:04,392 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:04,392 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:04,393 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:04,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1675070914, now seen corresponding path program 2 times [2018-11-18 16:01:04,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:04,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:04,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:04,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-18 16:01:04,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:01:04,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:01:04,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:01:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:01:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:01:04,438 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 5 states. [2018-11-18 16:01:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:04,473 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2018-11-18 16:01:04,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:01:04,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2018-11-18 16:01:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:04,475 INFO L225 Difference]: With dead ends: 86 [2018-11-18 16:01:04,475 INFO L226 Difference]: Without dead ends: 85 [2018-11-18 16:01:04,476 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:01:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-18 16:01:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-18 16:01:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 16:01:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2018-11-18 16:01:04,483 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 70 [2018-11-18 16:01:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:04,483 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2018-11-18 16:01:04,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:01:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2018-11-18 16:01:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-18 16:01:04,485 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:04,485 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:04,485 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:04,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:04,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1909772650, now seen corresponding path program 1 times [2018-11-18 16:01:04,486 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:04,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:04,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:04,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-18 16:01:04,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:01:04,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:01:04,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:01:04,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:01:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:01:04,537 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 5 states. [2018-11-18 16:01:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:04,565 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2018-11-18 16:01:04,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:01:04,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2018-11-18 16:01:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:04,567 INFO L225 Difference]: With dead ends: 89 [2018-11-18 16:01:04,567 INFO L226 Difference]: Without dead ends: 88 [2018-11-18 16:01:04,567 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:01:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-18 16:01:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-18 16:01:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-18 16:01:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2018-11-18 16:01:04,573 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 65 [2018-11-18 16:01:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:04,573 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2018-11-18 16:01:04,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:01:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2018-11-18 16:01:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-18 16:01:04,574 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:04,574 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:04,574 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:04,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash 399082410, now seen corresponding path program 3 times [2018-11-18 16:01:04,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:04,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:04,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:04,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 16:01:04,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:04,617 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:04,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:01:04,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 16:01:04,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:04,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 16:01:04,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:04,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-18 16:01:04,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 16:01:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 16:01:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-18 16:01:04,674 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 9 states. [2018-11-18 16:01:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:04,718 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2018-11-18 16:01:04,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 16:01:04,719 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2018-11-18 16:01:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:04,719 INFO L225 Difference]: With dead ends: 120 [2018-11-18 16:01:04,719 INFO L226 Difference]: Without dead ends: 119 [2018-11-18 16:01:04,720 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:01:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-18 16:01:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2018-11-18 16:01:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-18 16:01:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2018-11-18 16:01:04,728 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 71 [2018-11-18 16:01:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:04,729 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2018-11-18 16:01:04,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 16:01:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2018-11-18 16:01:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-18 16:01:04,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:04,731 INFO L375 BasicCegarLoop]: trace histogram [16, 13, 11, 9, 9, 9, 9, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:04,731 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:04,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:04,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1618309982, now seen corresponding path program 4 times [2018-11-18 16:01:04,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:04,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:04,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:04,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 105 proven. 200 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-11-18 16:01:04,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:04,819 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:04,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:01:04,840 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:01:04,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:04,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 309 proven. 86 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2018-11-18 16:01:04,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:04,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 18 [2018-11-18 16:01:04,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 16:01:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 16:01:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2018-11-18 16:01:04,951 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand 18 states. [2018-11-18 16:01:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:05,266 INFO L93 Difference]: Finished difference Result 221 states and 297 transitions. [2018-11-18 16:01:05,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 16:01:05,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 138 [2018-11-18 16:01:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:05,267 INFO L225 Difference]: With dead ends: 221 [2018-11-18 16:01:05,267 INFO L226 Difference]: Without dead ends: 134 [2018-11-18 16:01:05,268 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2018-11-18 16:01:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-18 16:01:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2018-11-18 16:01:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-18 16:01:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2018-11-18 16:01:05,279 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 138 [2018-11-18 16:01:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:05,279 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2018-11-18 16:01:05,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 16:01:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2018-11-18 16:01:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 16:01:05,280 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:05,280 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:05,281 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:05,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1659895493, now seen corresponding path program 5 times [2018-11-18 16:01:05,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:05,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:05,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:05,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:05,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-18 16:01:05,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:05,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:05,402 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 16:01:05,444 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-18 16:01:05,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:05,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 114 proven. 37 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-11-18 16:01:05,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:05,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-11-18 16:01:05,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 16:01:05,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 16:01:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:01:05,569 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand 12 states. [2018-11-18 16:01:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:05,720 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2018-11-18 16:01:05,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 16:01:05,720 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2018-11-18 16:01:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:05,721 INFO L225 Difference]: With dead ends: 226 [2018-11-18 16:01:05,721 INFO L226 Difference]: Without dead ends: 121 [2018-11-18 16:01:05,722 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-18 16:01:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-18 16:01:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2018-11-18 16:01:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-18 16:01:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2018-11-18 16:01:05,730 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 97 [2018-11-18 16:01:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:05,730 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2018-11-18 16:01:05,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 16:01:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2018-11-18 16:01:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-18 16:01:05,732 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:05,732 INFO L375 BasicCegarLoop]: trace histogram [20, 17, 13, 12, 12, 12, 12, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:05,732 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:05,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316141, now seen corresponding path program 6 times [2018-11-18 16:01:05,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:05,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:05,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:05,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 281 proven. 411 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-11-18 16:01:05,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:05,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:05,996 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 16:01:06,036 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-18 16:01:06,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:06,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 173 proven. 35 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2018-11-18 16:01:06,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:06,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 28 [2018-11-18 16:01:06,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-18 16:01:06,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-18 16:01:06,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2018-11-18 16:01:06,193 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand 28 states. [2018-11-18 16:01:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:07,049 INFO L93 Difference]: Finished difference Result 300 states and 353 transitions. [2018-11-18 16:01:07,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-18 16:01:07,050 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 170 [2018-11-18 16:01:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:07,051 INFO L225 Difference]: With dead ends: 300 [2018-11-18 16:01:07,051 INFO L226 Difference]: Without dead ends: 180 [2018-11-18 16:01:07,052 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1291, Invalid=3539, Unknown=0, NotChecked=0, Total=4830 [2018-11-18 16:01:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-18 16:01:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 158. [2018-11-18 16:01:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-18 16:01:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2018-11-18 16:01:07,060 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 170 [2018-11-18 16:01:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:07,061 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2018-11-18 16:01:07,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-18 16:01:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2018-11-18 16:01:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-18 16:01:07,062 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:07,062 INFO L375 BasicCegarLoop]: trace histogram [15, 13, 10, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:07,063 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:07,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1065435471, now seen corresponding path program 7 times [2018-11-18 16:01:07,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:07,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:07,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:07,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:07,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 181 proven. 98 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-18 16:01:07,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:07,172 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:07,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:07,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 274 proven. 188 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-18 16:01:07,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:07,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 24 [2018-11-18 16:01:07,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 16:01:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 16:01:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-11-18 16:01:07,354 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand 24 states. [2018-11-18 16:01:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:07,759 INFO L93 Difference]: Finished difference Result 320 states and 372 transitions. [2018-11-18 16:01:07,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 16:01:07,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 130 [2018-11-18 16:01:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:07,761 INFO L225 Difference]: With dead ends: 320 [2018-11-18 16:01:07,761 INFO L226 Difference]: Without dead ends: 180 [2018-11-18 16:01:07,762 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 16:01:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-18 16:01:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2018-11-18 16:01:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-11-18 16:01:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2018-11-18 16:01:07,770 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 130 [2018-11-18 16:01:07,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:07,770 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2018-11-18 16:01:07,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 16:01:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2018-11-18 16:01:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-18 16:01:07,772 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:07,772 INFO L375 BasicCegarLoop]: trace histogram [16, 14, 11, 11, 11, 11, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:07,772 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:07,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1968886354, now seen corresponding path program 2 times [2018-11-18 16:01:07,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:07,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:07,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:07,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:01:07,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 200 proven. 283 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-11-18 16:01:07,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:07,940 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:07,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 16:01:07,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 16:01:07,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:07,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 373 proven. 170 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-11-18 16:01:08,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:08,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 25 [2018-11-18 16:01:08,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 16:01:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 16:01:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2018-11-18 16:01:08,022 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand 25 states. [2018-11-18 16:01:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:08,452 INFO L93 Difference]: Finished difference Result 334 states and 385 transitions. [2018-11-18 16:01:08,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-18 16:01:08,452 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 129 [2018-11-18 16:01:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:08,453 INFO L225 Difference]: With dead ends: 334 [2018-11-18 16:01:08,453 INFO L226 Difference]: Without dead ends: 170 [2018-11-18 16:01:08,454 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1687, Unknown=0, NotChecked=0, Total=2352 [2018-11-18 16:01:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-18 16:01:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2018-11-18 16:01:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-11-18 16:01:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2018-11-18 16:01:08,461 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 129 [2018-11-18 16:01:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:08,461 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2018-11-18 16:01:08,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 16:01:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2018-11-18 16:01:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-18 16:01:08,462 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:08,462 INFO L375 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:08,463 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:08,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -623810062, now seen corresponding path program 3 times [2018-11-18 16:01:08,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:08,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:08,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:08,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:08,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-18 16:01:08,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:08,533 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:08,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:01:08,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 16:01:08,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:08,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 62 proven. 5 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-11-18 16:01:08,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:08,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-11-18 16:01:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 16:01:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 16:01:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:01:08,612 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand 10 states. [2018-11-18 16:01:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:08,654 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2018-11-18 16:01:08,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:01:08,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 117 [2018-11-18 16:01:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:08,655 INFO L225 Difference]: With dead ends: 161 [2018-11-18 16:01:08,656 INFO L226 Difference]: Without dead ends: 159 [2018-11-18 16:01:08,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:01:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-18 16:01:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-18 16:01:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-18 16:01:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 171 transitions. [2018-11-18 16:01:08,665 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 171 transitions. Word has length 117 [2018-11-18 16:01:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:08,666 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 171 transitions. [2018-11-18 16:01:08,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 16:01:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 171 transitions. [2018-11-18 16:01:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-18 16:01:08,668 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:08,669 INFO L375 BasicCegarLoop]: trace histogram [19, 16, 14, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:08,669 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:08,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1226786477, now seen corresponding path program 8 times [2018-11-18 16:01:08,669 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:08,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:08,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:08,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:08,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-18 16:01:08,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:08,797 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:08,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 16:01:08,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 16:01:08,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:08,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2018-11-18 16:01:08,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:08,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-11-18 16:01:08,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 16:01:08,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 16:01:08,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-18 16:01:08,922 INFO L87 Difference]: Start difference. First operand 159 states and 171 transitions. Second operand 17 states. [2018-11-18 16:01:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:08,966 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2018-11-18 16:01:08,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 16:01:08,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 169 [2018-11-18 16:01:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:08,968 INFO L225 Difference]: With dead ends: 160 [2018-11-18 16:01:08,968 INFO L226 Difference]: Without dead ends: 159 [2018-11-18 16:01:08,968 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-11-18 16:01:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-18 16:01:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-18 16:01:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-18 16:01:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2018-11-18 16:01:08,977 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 169 [2018-11-18 16:01:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:08,977 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2018-11-18 16:01:08,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 16:01:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2018-11-18 16:01:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-18 16:01:08,979 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:08,979 INFO L375 BasicCegarLoop]: trace histogram [28, 24, 23, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:08,981 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:08,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash -333231388, now seen corresponding path program 9 times [2018-11-18 16:01:08,982 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:08,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:08,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:08,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-18 16:01:09,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:09,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:09,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:01:09,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-11-18 16:01:09,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:09,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 272 proven. 389 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2018-11-18 16:01:09,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:09,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2018-11-18 16:01:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 16:01:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 16:01:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-11-18 16:01:09,299 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand 21 states. [2018-11-18 16:01:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:09,334 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2018-11-18 16:01:09,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 16:01:09,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 261 [2018-11-18 16:01:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:09,335 INFO L225 Difference]: With dead ends: 160 [2018-11-18 16:01:09,335 INFO L226 Difference]: Without dead ends: 159 [2018-11-18 16:01:09,335 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2018-11-18 16:01:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-18 16:01:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-18 16:01:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-18 16:01:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2018-11-18 16:01:09,343 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 261 [2018-11-18 16:01:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:09,343 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2018-11-18 16:01:09,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 16:01:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2018-11-18 16:01:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-18 16:01:09,346 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:09,346 INFO L375 BasicCegarLoop]: trace histogram [43, 40, 35, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:09,347 INFO L423 AbstractCegarLoop]: === Iteration 18 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:09,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1881532310, now seen corresponding path program 10 times [2018-11-18 16:01:09,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:09,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:09,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:09,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:09,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-18 16:01:09,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:09,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:09,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:01:09,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:01:09,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:09,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2018-11-18 16:01:09,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:09,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2018-11-18 16:01:09,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 16:01:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 16:01:09,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-11-18 16:01:09,897 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand 25 states. [2018-11-18 16:01:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:09,961 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2018-11-18 16:01:09,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 16:01:09,961 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 412 [2018-11-18 16:01:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:09,962 INFO L225 Difference]: With dead ends: 160 [2018-11-18 16:01:09,962 INFO L226 Difference]: Without dead ends: 159 [2018-11-18 16:01:09,963 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2018-11-18 16:01:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-18 16:01:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-18 16:01:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-18 16:01:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 168 transitions. [2018-11-18 16:01:09,969 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 168 transitions. Word has length 412 [2018-11-18 16:01:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:09,969 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 168 transitions. [2018-11-18 16:01:09,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 16:01:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 168 transitions. [2018-11-18 16:01:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2018-11-18 16:01:09,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:09,972 INFO L375 BasicCegarLoop]: trace histogram [68, 66, 55, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 32, 32, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:09,972 INFO L423 AbstractCegarLoop]: === Iteration 19 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:09,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:09,973 INFO L82 PathProgramCache]: Analyzing trace with hash 355145621, now seen corresponding path program 11 times [2018-11-18 16:01:09,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:09,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:09,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:09,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:09,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-18 16:01:10,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:10,445 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:10,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 16:01:10,623 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2018-11-18 16:01:10,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:10,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15678 backedges. 2390 proven. 2946 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2018-11-18 16:01:10,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:10,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2018-11-18 16:01:10,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 16:01:10,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 16:01:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-11-18 16:01:10,938 INFO L87 Difference]: Start difference. First operand 159 states and 168 transitions. Second operand 29 states. [2018-11-18 16:01:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:11,016 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2018-11-18 16:01:11,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-18 16:01:11,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 661 [2018-11-18 16:01:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:11,018 INFO L225 Difference]: With dead ends: 160 [2018-11-18 16:01:11,018 INFO L226 Difference]: Without dead ends: 159 [2018-11-18 16:01:11,019 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2018-11-18 16:01:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-18 16:01:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-18 16:01:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-18 16:01:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2018-11-18 16:01:11,025 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 661 [2018-11-18 16:01:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:11,026 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2018-11-18 16:01:11,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 16:01:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2018-11-18 16:01:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2018-11-18 16:01:11,033 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:01:11,033 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:01:11,034 INFO L423 AbstractCegarLoop]: === Iteration 20 === [fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 16:01:11,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:01:11,034 INFO L82 PathProgramCache]: Analyzing trace with hash -642383590, now seen corresponding path program 12 times [2018-11-18 16:01:11,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:01:11,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:01:11,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:11,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:01:11,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:01:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:01:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-18 16:01:11,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:01:11,879 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:01:11,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 16:01:12,186 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2018-11-18 16:01:12,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:01:12,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:01:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2018-11-18 16:01:12,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:01:12,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 32 [2018-11-18 16:01:12,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-18 16:01:12,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-18 16:01:12,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 16:01:12,950 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand 33 states. [2018-11-18 16:01:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:01:13,029 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2018-11-18 16:01:13,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 16:01:13,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1067 [2018-11-18 16:01:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:01:13,031 INFO L225 Difference]: With dead ends: 159 [2018-11-18 16:01:13,031 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 16:01:13,032 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1252 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 16:01:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 16:01:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 16:01:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 16:01:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 16:01:13,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1067 [2018-11-18 16:01:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:01:13,032 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 16:01:13,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-18 16:01:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 16:01:13,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 16:01:13,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 16:01:13,512 WARN L180 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2018-11-18 16:01:13,705 WARN L180 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 20 [2018-11-18 16:01:13,706 INFO L425 ceAbstractionStarter]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-18 16:01:13,707 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-18 16:01:13,707 INFO L425 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (< 9 |fibonacci_#in~n|))) (and (or (and (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) .cse0) (or (<= 9 fibonacci_~n) (< |fibonacci_#in~n| 9) .cse0) (or (< 8 |fibonacci_#in~n|) (<= |fibonacci_#in~n| fibonacci_~n)))) [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-4(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-5(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L421 ceAbstractionStarter]: At program point L20-6(line 20) the Hoare annotation is: (and (or (< 3 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 1)) (or (and (<= |fibonacci_#t~ret0| 21) (<= |fibonacci_#in~n| fibonacci_~n) (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n |fibonacci_#in~n|)) (< 9 |fibonacci_#in~n|)) (or (<= |fibonacci_#t~ret0| 5) (< 6 |fibonacci_#in~n|)) (or (< 8 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 13)) (or (<= 2 fibonacci_~n) (< 2 |fibonacci_#in~n|)) (or (<= |fibonacci_#t~ret0| 3) (< 5 |fibonacci_#in~n|)) (or (<= |fibonacci_#t~ret0| 8) (< 7 |fibonacci_#in~n|)) (or (< 4 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 2))) [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-7(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-8(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point L20-9(line 20) no Hoare annotation was computed. [2018-11-18 16:01:13,708 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 16:01:13,708 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 16:01:13,709 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-18 16:01:13,709 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-18 16:01:13,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:01:13 BoogieIcfgContainer [2018-11-18 16:01:13,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:01:13,712 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:01:13,712 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:01:13,712 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:01:13,712 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:01:02" (3/4) ... [2018-11-18 16:01:13,716 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 16:01:13,722 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-18 16:01:13,722 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 16:01:13,722 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 16:01:13,725 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 16:01:13,725 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 16:01:13,726 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 16:01:13,755 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c56205b4-e6ea-4d6e-8b7c-ff169abab011/bin-2019/uautomizer/witness.graphml [2018-11-18 16:01:13,755 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:01:13,756 INFO L168 Benchmark]: Toolchain (without parser) took 11430.51 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 800.6 MB). Free memory was 958.1 MB in the beginning and 1.1 GB in the end (delta: -131.6 MB). Peak memory consumption was 669.0 MB. Max. memory is 11.5 GB. [2018-11-18 16:01:13,756 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:01:13,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.02 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:01:13,758 INFO L168 Benchmark]: Boogie Preprocessor took 14.46 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:01:13,759 INFO L168 Benchmark]: RCFGBuilder took 168.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -179.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-11-18 16:01:13,759 INFO L168 Benchmark]: TraceAbstraction took 11054.17 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 660.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.5 MB). Peak memory consumption was 695.1 MB. Max. memory is 11.5 GB. [2018-11-18 16:01:13,759 INFO L168 Benchmark]: Witness Printer took 43.26 ms. Allocated memory is still 1.8 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:01:13,761 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 147.02 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.46 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 168.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -179.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11054.17 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 660.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.5 MB). Peak memory consumption was 695.1 MB. Max. memory is 11.5 GB. * Witness Printer took 43.26 ms. Allocated memory is still 1.8 GB. Free memory is still 1.1 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, 11.0s OverallTime, 20 OverallIterations, 109 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 563 SDtfs, 2744 SDslu, 3233 SDs, 0 SdLazy, 3620 SolverSat, 1048 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4348 GetRequests, 3946 SyntacticMatches, 3 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 112 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 302 PreInvPairs, 451 NumberOfFragments, 120 HoareAnnotationTreeSize, 302 FomulaSimplifications, 3142 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2648 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 7286 NumberOfCodeBlocks, 7099 NumberOfCodeBlocksAsserted, 212 NumberOfCheckSat, 7251 ConstructedInterpolants, 0 QuantifiedInterpolants, 9777453 SizeOfPredicates, 44 NumberOfNonLiveVariables, 6270 ConjunctsInSsa, 632 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 114277/140631 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...