./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7b71b458b3f08f188a62c7539b715f43fd7f97d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 15:37:11,751 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 15:37:11,752 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 15:37:11,761 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 15:37:11,761 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 15:37:11,761 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 15:37:11,762 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 15:37:11,763 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 15:37:11,764 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 15:37:11,765 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 15:37:11,765 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 15:37:11,766 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 15:37:11,766 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 15:37:11,767 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 15:37:11,768 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 15:37:11,768 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 15:37:11,769 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 15:37:11,770 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 15:37:11,771 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 15:37:11,772 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 15:37:11,773 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 15:37:11,774 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 15:37:11,776 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 15:37:11,776 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 15:37:11,776 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 15:37:11,776 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 15:37:11,777 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 15:37:11,777 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 15:37:11,778 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 15:37:11,778 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 15:37:11,779 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 15:37:11,779 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 15:37:11,779 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 15:37:11,779 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 15:37:11,780 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 15:37:11,781 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 15:37:11,781 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 15:37:11,790 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 15:37:11,790 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 15:37:11,791 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 15:37:11,791 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 15:37:11,791 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 15:37:11,791 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 15:37:11,792 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 15:37:11,793 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 15:37:11,793 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 15:37:11,793 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 15:37:11,793 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 15:37:11,793 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 15:37:11,793 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 15:37:11,794 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 15:37:11,794 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 15:37:11,794 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 15:37:11,794 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 15:37:11,794 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 15:37:11,794 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 15:37:11,794 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:37:11,795 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 15:37:11,795 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 15:37:11,796 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 15:37:11,796 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 15:37:11,796 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 15:37:11,796 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2018-11-23 15:37:11,819 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 15:37:11,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 15:37:11,831 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 15:37:11,832 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 15:37:11,832 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 15:37:11,833 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-23 15:37:11,874 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/data/dd1ecd9b8/aa9d9524859044af8ef09c68e8f026f8/FLAG9d493f6a9 [2018-11-23 15:37:12,272 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 15:37:12,272 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-23 15:37:12,276 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/data/dd1ecd9b8/aa9d9524859044af8ef09c68e8f026f8/FLAG9d493f6a9 [2018-11-23 15:37:12,285 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/data/dd1ecd9b8/aa9d9524859044af8ef09c68e8f026f8 [2018-11-23 15:37:12,287 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 15:37:12,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 15:37:12,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 15:37:12,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 15:37:12,292 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 15:37:12,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787be1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12, skipping insertion in model container [2018-11-23 15:37:12,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 15:37:12,317 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 15:37:12,416 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:37:12,418 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 15:37:12,427 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 15:37:12,434 INFO L195 MainTranslator]: Completed translation [2018-11-23 15:37:12,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12 WrapperNode [2018-11-23 15:37:12,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 15:37:12,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 15:37:12,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 15:37:12,436 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 15:37:12,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 15:37:12,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 15:37:12,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 15:37:12,449 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 15:37:12,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... [2018-11-23 15:37:12,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 15:37:12,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 15:37:12,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 15:37:12,460 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 15:37:12,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 15:37:12,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 15:37:12,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 15:37:12,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 15:37:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 15:37:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 15:37:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 15:37:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 15:37:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 15:37:12,613 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 15:37:12,613 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 15:37:12,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:12 BoogieIcfgContainer [2018-11-23 15:37:12,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 15:37:12,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 15:37:12,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 15:37:12,616 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 15:37:12,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:37:12" (1/3) ... [2018-11-23 15:37:12,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3294fc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:12, skipping insertion in model container [2018-11-23 15:37:12,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:12" (2/3) ... [2018-11-23 15:37:12,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3294fc52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:12, skipping insertion in model container [2018-11-23 15:37:12,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:12" (3/3) ... [2018-11-23 15:37:12,619 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_true-unreach-call_true-termination.c [2018-11-23 15:37:12,624 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 15:37:12,629 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 15:37:12,639 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 15:37:12,664 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 15:37:12,664 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 15:37:12,664 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 15:37:12,664 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 15:37:12,665 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 15:37:12,665 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 15:37:12,665 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 15:37:12,665 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 15:37:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-23 15:37:12,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 15:37:12,681 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:12,681 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:12,682 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:12,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-23 15:37:12,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:12,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:12,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:12,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:12,715 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:37:12,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:37:12,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:37:12,791 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:37:12,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:37:12,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:37:12,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:37:12,802 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-23 15:37:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:12,886 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-23 15:37:12,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:37:12,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 15:37:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:12,894 INFO L225 Difference]: With dead ends: 35 [2018-11-23 15:37:12,894 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 15:37:12,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 15:37:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 15:37:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 15:37:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 15:37:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 15:37:12,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-23 15:37:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:12,930 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 15:37:12,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:37:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 15:37:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 15:37:12,932 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:12,932 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:12,932 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:12,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-23 15:37:12,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:12,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:12,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:12,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:12,934 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 15:37:12,968 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 15:37:12,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 15:37:12,968 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:37:12,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 15:37:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 15:37:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 15:37:12,969 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-23 15:37:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:13,016 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-23 15:37:13,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 15:37:13,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 15:37:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:13,017 INFO L225 Difference]: With dead ends: 27 [2018-11-23 15:37:13,017 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 15:37:13,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 15:37:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 15:37:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-23 15:37:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 15:37:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 15:37:13,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-23 15:37:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:13,023 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 15:37:13,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 15:37:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 15:37:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 15:37:13,024 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:13,024 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:13,024 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:13,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-23 15:37:13,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:13,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:13,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:13,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:13,026 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 15:37:13,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:13,111 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:13,112 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-23 15:37:13,113 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2018-11-23 15:37:13,136 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:37:13,137 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:37:13,257 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 15:37:13,259 INFO L272 AbstractInterpreter]: Visited 17 different actions 92 times. Never merged. Widened at 1 different actions 4 times. Performed 188 root evaluator evaluations with a maximum evaluation depth of 3. Performed 188 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 6 fixpoints after 3 different actions. Largest state had 5 variables. [2018-11-23 15:37:13,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:13,267 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 15:37:13,296 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 15:37:13,297 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 15:37:13,332 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-23 15:37:13,332 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 15:37:13,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 15:37:13,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-23 15:37:13,333 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 15:37:13,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 15:37:13,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 15:37:13,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 15:37:13,333 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2018-11-23 15:37:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:13,507 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2018-11-23 15:37:13,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 15:37:13,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-23 15:37:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:13,509 INFO L225 Difference]: With dead ends: 54 [2018-11-23 15:37:13,509 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 15:37:13,509 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-23 15:37:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 15:37:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-23 15:37:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-23 15:37:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-11-23 15:37:13,516 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2018-11-23 15:37:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:13,516 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-11-23 15:37:13,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 15:37:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-11-23 15:37:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-23 15:37:13,518 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:13,518 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:13,518 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:13,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2018-11-23 15:37:13,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:13,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:13,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:13,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:13,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-23 15:37:13,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:13,566 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:13,566 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:37:13,567 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:37:13,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:13,567 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:37:13,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:37:13,573 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:37:13,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 15:37:13,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:37:13,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:37:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 15:37:13,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:37:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-11-23 15:37:13,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:37:13,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2018-11-23 15:37:13,785 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:37:13,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 15:37:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 15:37:13,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-23 15:37:13,786 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2018-11-23 15:37:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:13,867 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2018-11-23 15:37:13,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 15:37:13,867 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-11-23 15:37:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:13,868 INFO L225 Difference]: With dead ends: 73 [2018-11-23 15:37:13,869 INFO L226 Difference]: Without dead ends: 47 [2018-11-23 15:37:13,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-11-23 15:37:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-23 15:37:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2018-11-23 15:37:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 15:37:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-11-23 15:37:13,878 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 39 [2018-11-23 15:37:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:13,878 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-11-23 15:37:13,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 15:37:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-11-23 15:37:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 15:37:13,879 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:13,879 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:13,880 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:13,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 1 times [2018-11-23 15:37:13,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:13,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:13,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:37:13,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:13,881 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 15:37:13,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:13,929 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:13,930 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-11-23 15:37:13,930 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2018-11-23 15:37:13,931 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 15:37:13,931 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 15:37:14,132 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 15:37:14,132 INFO L272 AbstractInterpreter]: Visited 22 different actions 517 times. Merged at 10 different actions 108 times. Widened at 1 different actions 8 times. Performed 1268 root evaluator evaluations with a maximum evaluation depth of 3. Performed 1268 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 27 fixpoints after 6 different actions. Largest state had 5 variables. [2018-11-23 15:37:14,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:14,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 15:37:14,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:14,134 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:37:14,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:14,140 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:37:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:14,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:37:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 15:37:14,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:37:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-23 15:37:14,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:37:14,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 11 [2018-11-23 15:37:14,388 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:37:14,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 15:37:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 15:37:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-23 15:37:14,389 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2018-11-23 15:37:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:14,435 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2018-11-23 15:37:14,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 15:37:14,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-11-23 15:37:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:14,436 INFO L225 Difference]: With dead ends: 70 [2018-11-23 15:37:14,436 INFO L226 Difference]: Without dead ends: 56 [2018-11-23 15:37:14,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-23 15:37:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-23 15:37:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2018-11-23 15:37:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-23 15:37:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2018-11-23 15:37:14,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 41 [2018-11-23 15:37:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:14,444 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2018-11-23 15:37:14,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 15:37:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2018-11-23 15:37:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-23 15:37:14,445 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:14,445 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:14,445 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:14,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1437629917, now seen corresponding path program 2 times [2018-11-23 15:37:14,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:14,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:14,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:14,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:14,447 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-23 15:37:14,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:14,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:14,562 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:37:14,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:37:14,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:14,562 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:37:14,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:37:14,569 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:37:14,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-23 15:37:14,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:37:14,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:37:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-11-23 15:37:14,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:37:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-11-23 15:37:14,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:37:14,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 16 [2018-11-23 15:37:14,817 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:37:14,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 15:37:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 15:37:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-11-23 15:37:14,818 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 13 states. [2018-11-23 15:37:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:15,024 INFO L93 Difference]: Finished difference Result 98 states and 144 transitions. [2018-11-23 15:37:15,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 15:37:15,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2018-11-23 15:37:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:15,026 INFO L225 Difference]: With dead ends: 98 [2018-11-23 15:37:15,026 INFO L226 Difference]: Without dead ends: 68 [2018-11-23 15:37:15,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2018-11-23 15:37:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-23 15:37:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2018-11-23 15:37:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-23 15:37:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2018-11-23 15:37:15,037 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 67 [2018-11-23 15:37:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:15,038 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2018-11-23 15:37:15,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 15:37:15,038 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2018-11-23 15:37:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-23 15:37:15,041 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:15,041 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:15,041 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:15,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 3 times [2018-11-23 15:37:15,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:15,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:15,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:37:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:15,043 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-11-23 15:37:15,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:15,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:15,118 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:37:15,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:37:15,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:15,119 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:37:15,124 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 15:37:15,124 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 15:37:15,139 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 15:37:15,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:37:15,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:37:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-23 15:37:15,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:37:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-23 15:37:15,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:37:15,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11] total 12 [2018-11-23 15:37:15,488 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:37:15,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 15:37:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 15:37:15,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-11-23 15:37:15,489 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand 8 states. [2018-11-23 15:37:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:15,573 INFO L93 Difference]: Finished difference Result 85 states and 124 transitions. [2018-11-23 15:37:15,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 15:37:15,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2018-11-23 15:37:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:15,575 INFO L225 Difference]: With dead ends: 85 [2018-11-23 15:37:15,575 INFO L226 Difference]: Without dead ends: 71 [2018-11-23 15:37:15,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-11-23 15:37:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-23 15:37:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2018-11-23 15:37:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-23 15:37:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2018-11-23 15:37:15,582 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 82 [2018-11-23 15:37:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:15,582 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2018-11-23 15:37:15,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 15:37:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2018-11-23 15:37:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-23 15:37:15,584 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:15,584 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 18, 10, 10, 10, 10, 10, 10, 10, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:15,584 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:15,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash 818443429, now seen corresponding path program 4 times [2018-11-23 15:37:15,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:15,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:15,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 15:37:15,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:15,585 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 239 proven. 179 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2018-11-23 15:37:15,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:15,684 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:15,684 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:37:15,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:37:15,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:15,685 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:37:15,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:15,692 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 15:37:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:15,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:37:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 178 proven. 214 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2018-11-23 15:37:15,825 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:37:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 177 proven. 227 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2018-11-23 15:37:16,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:37:16,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 12] total 20 [2018-11-23 15:37:16,224 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:37:16,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 15:37:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 15:37:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:37:16,225 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 15 states. [2018-11-23 15:37:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:16,420 INFO L93 Difference]: Finished difference Result 147 states and 244 transitions. [2018-11-23 15:37:16,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 15:37:16,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 151 [2018-11-23 15:37:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:16,421 INFO L225 Difference]: With dead ends: 147 [2018-11-23 15:37:16,421 INFO L226 Difference]: Without dead ends: 58 [2018-11-23 15:37:16,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 284 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2018-11-23 15:37:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-23 15:37:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-23 15:37:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-23 15:37:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2018-11-23 15:37:16,427 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 151 [2018-11-23 15:37:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:16,427 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2018-11-23 15:37:16,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 15:37:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2018-11-23 15:37:16,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-23 15:37:16,429 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 15:37:16,429 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 15:37:16,429 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 15:37:16,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 15:37:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2018-11-23 15:37:16,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 15:37:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:16,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 15:37:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 15:37:16,430 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 15:37:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 15:37:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-23 15:37:16,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:16,599 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 15:37:16,600 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 15:37:16,600 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 15:37:16,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 15:37:16,600 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 15:37:16,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 15:37:16,606 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 15:37:16,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-23 15:37:16,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 15:37:16,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 15:37:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-23 15:37:16,755 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 15:37:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-23 15:37:17,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 15:37:17,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2018-11-23 15:37:17,158 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 15:37:17,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 15:37:17,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 15:37:17,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:37:17,159 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 20 states. [2018-11-23 15:37:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 15:37:17,251 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2018-11-23 15:37:17,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 15:37:17,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2018-11-23 15:37:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 15:37:17,252 INFO L225 Difference]: With dead ends: 58 [2018-11-23 15:37:17,252 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 15:37:17,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 214 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-23 15:37:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 15:37:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 15:37:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 15:37:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 15:37:17,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2018-11-23 15:37:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 15:37:17,253 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 15:37:17,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 15:37:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 15:37:17,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 15:37:17,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 15:37:17,516 WARN L180 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2018-11-23 15:37:17,554 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 15:37:17,554 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:37:17,554 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 15:37:17,554 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 15:37:17,555 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 main_~x~0) (<= main_~x~0 5)) [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-23 15:37:17,555 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-23 15:37:17,556 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-23 15:37:17,556 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-23 15:37:17,556 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (<= fibo_~n |fibo_#in~n|))) (let ((.cse1 (and (<= 4 fibo_~n) .cse0 (<= |fibo_#in~n| fibo_~n)))) (and (or (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (not (= |fibo_#in~n| 4))) (or (not (= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3))) (or (and .cse0 (<= |fibo_#in~n| 3) (<= 3 fibo_~n)) .cse1 (and (<= |fibo_#in~n| 2) .cse0 (< 1 fibo_~n))) (or .cse1 (and (<= |fibo_#t~ret0| 1) (<= 1 |fibo_#t~ret0|)))))) [2018-11-23 15:37:17,556 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-23 15:37:17,556 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-23 15:37:17,556 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-23 15:37:17,556 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-23 15:37:17,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:37:17 BoogieIcfgContainer [2018-11-23 15:37:17,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 15:37:17,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 15:37:17,559 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 15:37:17,559 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 15:37:17,559 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:12" (3/4) ... [2018-11-23 15:37:17,562 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 15:37:17,565 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 15:37:17,566 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 15:37:17,566 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-23 15:37:17,568 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 15:37:17,568 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 15:37:17,569 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 15:37:17,593 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6bb65790-9b1a-4dd1-810b-71925a047d1a/bin-2019/utaipan/witness.graphml [2018-11-23 15:37:17,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 15:37:17,594 INFO L168 Benchmark]: Toolchain (without parser) took 5307.01 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 328.7 MB). Free memory was 958.1 MB in the beginning and 1.2 GB in the end (delta: -272.5 MB). Peak memory consumption was 56.3 MB. Max. memory is 11.5 GB. [2018-11-23 15:37:17,595 INFO L168 Benchmark]: CDTParser took 0.16 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. [2018-11-23 15:37:17,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.40 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. [2018-11-23 15:37:17,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.29 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:37:17,595 INFO L168 Benchmark]: Boogie Preprocessor took 10.50 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. [2018-11-23 15:37:17,596 INFO L168 Benchmark]: RCFGBuilder took 153.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -199.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 15:37:17,596 INFO L168 Benchmark]: TraceAbstraction took 4944.39 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 168.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -86.2 MB). Peak memory consumption was 82.1 MB. Max. memory is 11.5 GB. [2018-11-23 15:37:17,596 INFO L168 Benchmark]: Witness Printer took 35.03 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 15:37:17,598 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 146.40 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 Procedure Inliner took 13.29 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.50 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 153.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -199.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4944.39 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 168.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -86.2 MB). Peak memory consumption was 82.1 MB. Max. memory is 11.5 GB. * Witness Printer took 35.03 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 4.9s OverallTime, 9 OverallIterations, 21 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 185 SDtfs, 202 SDslu, 868 SDs, 0 SdLazy, 771 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 1121 GetRequests, 940 SyntacticMatches, 55 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.84 AbsIntWeakeningRatio, 0.56 AbsIntAvgWeakeningVarsNumRemoved, 0.16 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 48 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 119 PreInvPairs, 212 NumberOfFragments, 97 HoareAnnotationTreeSize, 119 FomulaSimplifications, 4225 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 971 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1031 NumberOfCodeBlocks, 980 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1499 ConstructedInterpolants, 0 QuantifiedInterpolants, 334897 SizeOfPredicates, 22 NumberOfNonLiveVariables, 969 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 5252/6963 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...