./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_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_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/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 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 .................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:40:46,794 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 11:40:46,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 11:40:46,802 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 11:40:46,802 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 11:40:46,803 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 11:40:46,803 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 11:40:46,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 11:40:46,805 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 11:40:46,806 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 11:40:46,807 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 11:40:46,807 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 11:40:46,808 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 11:40:46,808 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 11:40:46,809 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 11:40:46,809 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 11:40:46,810 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 11:40:46,811 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 11:40:46,812 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 11:40:46,813 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 11:40:46,814 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 11:40:46,815 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 11:40:46,816 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 11:40:46,817 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 11:40:46,817 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 11:40:46,817 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 11:40:46,818 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 11:40:46,818 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 11:40:46,819 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 11:40:46,820 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 11:40:46,820 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 11:40:46,820 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 11:40:46,820 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 11:40:46,821 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 11:40:46,821 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 11:40:46,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 11:40:46,822 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 11:40:46,831 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 11:40:46,832 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 11:40:46,832 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 11:40:46,832 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 11:40:46,832 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 11:40:46,832 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 11:40:46,833 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 11:40:46,834 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 11:40:46,834 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 11:40:46,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 11:40:46,834 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 11:40:46,835 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 11:40:46,836 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 11:40:46,836 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 11:40:46,836 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 11:40:46,836 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 11:40:46,836 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 11:40:46,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 11:40:46,836 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 11:40:46,837 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 11:40:46,837 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 11:40:46,837 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 11:40:46,837 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 11:40:46,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 11:40:46,837 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 11:40:46,837 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_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/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 -> 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 [2018-11-23 11:40:46,860 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 11:40:46,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 11:40:46,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 11:40:46,872 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 11:40:46,873 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 11:40:46,873 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_true-unreach-call_true-termination.c [2018-11-23 11:40:46,909 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/data/f8204213a/2fed321fc95e4dc5ad48057e6bed3e43/FLAGa6fc82b3e [2018-11-23 11:40:47,302 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 11:40:47,302 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/sv-benchmarks/c/recursive-simple/fibo_2calls_2_true-unreach-call_true-termination.c [2018-11-23 11:40:47,307 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/data/f8204213a/2fed321fc95e4dc5ad48057e6bed3e43/FLAGa6fc82b3e [2018-11-23 11:40:47,317 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/data/f8204213a/2fed321fc95e4dc5ad48057e6bed3e43 [2018-11-23 11:40:47,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 11:40:47,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 11:40:47,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 11:40:47,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 11:40:47,322 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 11:40:47,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc0002c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47, skipping insertion in model container [2018-11-23 11:40:47,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 11:40:47,343 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 11:40:47,444 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 11:40:47,446 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 11:40:47,455 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 11:40:47,463 INFO L195 MainTranslator]: Completed translation [2018-11-23 11:40:47,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47 WrapperNode [2018-11-23 11:40:47,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 11:40:47,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 11:40:47,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 11:40:47,464 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 11:40:47,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 11:40:47,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 11:40:47,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 11:40:47,477 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 11:40:47,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... [2018-11-23 11:40:47,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 11:40:47,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 11:40:47,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 11:40:47,492 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 11:40:47,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/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 11:40:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 11:40:47,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 11:40:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 11:40:47,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 11:40:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 11:40:47,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 11:40:47,572 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-23 11:40:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-23 11:40:47,573 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-23 11:40:47,573 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-23 11:40:47,683 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 11:40:47,683 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 11:40:47,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:40:47 BoogieIcfgContainer [2018-11-23 11:40:47,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 11:40:47,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 11:40:47,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 11:40:47,687 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 11:40:47,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:40:47" (1/3) ... [2018-11-23 11:40:47,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496554be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:40:47, skipping insertion in model container [2018-11-23 11:40:47,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:40:47" (2/3) ... [2018-11-23 11:40:47,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496554be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:40:47, skipping insertion in model container [2018-11-23 11:40:47,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:40:47" (3/3) ... [2018-11-23 11:40:47,690 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2_true-unreach-call_true-termination.c [2018-11-23 11:40:47,698 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 11:40:47,705 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 11:40:47,718 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 11:40:47,743 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 11:40:47,743 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 11:40:47,743 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 11:40:47,743 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 11:40:47,743 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 11:40:47,743 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 11:40:47,743 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 11:40:47,743 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 11:40:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-23 11:40:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 11:40:47,763 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:40:47,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:40:47,765 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:40:47,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:40:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-23 11:40:47,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 11:40:47,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:47,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:40:47,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:47,803 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 11:40:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:40:47,893 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 11:40:47,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:40:47,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 11:40:47,894 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 11:40:47,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 11:40:47,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 11:40:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 11:40:47,905 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-23 11:40:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:40:47,970 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-23 11:40:47,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 11:40:47,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 11:40:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 11:40:47,977 INFO L225 Difference]: With dead ends: 44 [2018-11-23 11:40:47,977 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 11:40:47,979 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 11:40:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 11:40:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-23 11:40:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 11:40:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 11:40:48,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-23 11:40:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 11:40:48,006 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 11:40:48,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 11:40:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 11:40:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 11:40:48,007 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:40:48,007 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:40:48,007 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:40:48,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:40:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-23 11:40:48,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 11:40:48,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:48,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:40:48,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:48,009 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 11:40:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:40:48,055 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 11:40:48,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 11:40:48,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 11:40:48,055 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 11:40:48,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 11:40:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 11:40:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 11:40:48,057 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-23 11:40:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:40:48,120 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-23 11:40:48,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 11:40:48,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 11:40:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 11:40:48,121 INFO L225 Difference]: With dead ends: 36 [2018-11-23 11:40:48,121 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 11:40:48,122 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 11:40:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 11:40:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-23 11:40:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 11:40:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-23 11:40:48,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-23 11:40:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 11:40:48,127 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-23 11:40:48,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 11:40:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-23 11:40:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 11:40:48,128 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:40:48,128 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:40:48,128 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:40:48,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:40:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-23 11:40:48,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 11:40:48,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:48,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:40:48,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:48,130 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 11:40:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:40:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 11:40:48,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:40:48,183 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 11:40:48,184 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-11-23 11:40:48,185 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-11-23 11:40:48,204 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 11:40:48,205 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 11:40:48,271 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 11:40:48,272 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-11-23 11:40:48,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:40:48,277 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 11:40:48,304 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-11-23 11:40:48,304 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 11:40:48,339 INFO L415 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-11-23 11:40:48,339 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 11:40:48,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 11:40:48,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-23 11:40:48,340 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 11:40:48,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 11:40:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 11:40:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 11:40:48,341 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-11-23 11:40:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:40:48,493 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2018-11-23 11:40:48,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 11:40:48,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-11-23 11:40:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 11:40:48,494 INFO L225 Difference]: With dead ends: 70 [2018-11-23 11:40:48,494 INFO L226 Difference]: Without dead ends: 46 [2018-11-23 11:40:48,495 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 11:40:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-23 11:40:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2018-11-23 11:40:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-23 11:40:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-11-23 11:40:48,502 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2018-11-23 11:40:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 11:40:48,502 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-11-23 11:40:48,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 11:40:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-11-23 11:40:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 11:40:48,503 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 11:40:48,503 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 11:40:48,504 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 11:40:48,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:40:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-23 11:40:48,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 11:40:48,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:48,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 11:40:48,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 11:40:48,505 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 11:40:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 11:40:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 11:40:48,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 11:40:48,595 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 11:40:48,595 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-23 11:40:48,596 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-11-23 11:40:48,597 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 11:40:48,597 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 11:40:48,614 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-23 11:40:48,614 INFO L272 AbstractInterpreter]: Visited 24 different actions 28 times. Never merged. Never widened. Performed 53 root evaluator evaluations with a maximum evaluation depth of 4. Performed 53 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 5 variables. [2018-11-23 11:40:48,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 11:40:48,616 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-23 11:40:48,642 INFO L227 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 53.92% of their original sizes. [2018-11-23 11:40:48,642 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-23 11:40:48,737 INFO L415 sIntCurrentIteration]: We unified 26 AI predicates to 26 [2018-11-23 11:40:48,737 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-23 11:40:48,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 11:40:48,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [9] total 23 [2018-11-23 11:40:48,737 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 11:40:48,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 11:40:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 11:40:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2018-11-23 11:40:48,738 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 16 states. [2018-11-23 11:40:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 11:40:49,122 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2018-11-23 11:40:49,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 11:40:49,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2018-11-23 11:40:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 11:40:49,123 INFO L225 Difference]: With dead ends: 51 [2018-11-23 11:40:49,123 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 11:40:49,124 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2018-11-23 11:40:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 11:40:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 11:40:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 11:40:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 11:40:49,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-11-23 11:40:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 11:40:49,125 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 11:40:49,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 11:40:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 11:40:49,125 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 11:40:49,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 11:40:49,172 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 11:40:49,172 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 11:40:49,173 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 11:40:49,173 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 11:40:49,173 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 11:40:49,173 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 11:40:49,173 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-23 11:40:49,173 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-23 11:40:49,173 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-23 11:40:49,173 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-23 11:40:49,173 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-23 11:40:49,174 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-23 11:40:49,174 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (= main_~x~0 2) [2018-11-23 11:40:49,174 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-23 11:40:49,174 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-23 11:40:49,174 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-23 11:40:49,174 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (not (= |fibo2_#in~n| 0)) (not (= |fibo2_#in~n| 1))) [2018-11-23 11:40:49,174 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-23 11:40:49,174 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (not (= |fibo2_#in~n| 0)) (not (= |fibo2_#in~n| 1))) [2018-11-23 11:40:49,175 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-23 11:40:49,175 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-23 11:40:49,175 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-23 11:40:49,175 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-23 11:40:49,175 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-23 11:40:49,175 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-23 11:40:49,175 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (or (not (= |fibo1_#in~n| 2)) (= fibo1_~n 2)) [2018-11-23 11:40:49,175 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 11:40:49,175 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (or (not (= |fibo1_#in~n| 2)) (and (= |fibo1_#t~ret0| 1) (= fibo1_~n 2))) [2018-11-23 11:40:49,176 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-23 11:40:49,176 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-23 11:40:49,176 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-23 11:40:49,176 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-23 11:40:49,176 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-23 11:40:49,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 11:40:49 BoogieIcfgContainer [2018-11-23 11:40:49,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 11:40:49,178 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 11:40:49,178 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 11:40:49,178 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 11:40:49,179 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:40:47" (3/4) ... [2018-11-23 11:40:49,181 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 11:40:49,184 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 11:40:49,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 11:40:49,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-23 11:40:49,185 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-23 11:40:49,187 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 11:40:49,187 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 11:40:49,188 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 11:40:49,218 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c05b8d56-d3ed-43f5-b99c-8ae62d47ad2a/bin-2019/utaipan/witness.graphml [2018-11-23 11:40:49,218 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 11:40:49,219 INFO L168 Benchmark]: Toolchain (without parser) took 1900.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 953.8 MB in the beginning and 919.1 MB in the end (delta: 34.7 MB). Peak memory consumption was 167.3 MB. Max. memory is 11.5 GB. [2018-11-23 11:40:49,220 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 11:40:49,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.50 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 11:40:49,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.12 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 11:40:49,221 INFO L168 Benchmark]: Boogie Preprocessor took 14.90 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 11:40:49,222 INFO L168 Benchmark]: RCFGBuilder took 191.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -175.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-23 11:40:49,222 INFO L168 Benchmark]: TraceAbstraction took 1493.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 922.5 MB in the end (delta: 193.3 MB). Peak memory consumption was 193.3 MB. Max. memory is 11.5 GB. [2018-11-23 11:40:49,222 INFO L168 Benchmark]: Witness Printer took 40.34 ms. Allocated memory is still 1.2 GB. Free memory was 922.5 MB in the beginning and 919.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-23 11:40:49,225 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 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.50 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 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 13.12 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.90 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 191.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -175.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1493.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 922.5 MB in the end (delta: 193.3 MB). Peak memory consumption was 193.3 MB. Max. memory is 11.5 GB. * Witness Printer took 40.34 ms. Allocated memory is still 1.2 GB. Free memory was 922.5 MB in the beginning and 919.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. SAFE Result, 1.4s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 101 SDtfs, 62 SDslu, 408 SDs, 0 SdLazy, 77 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 2 AbstIntStrong, 0.7728758169934642 AbsIntWeakeningRatio, 0.5490196078431373 AbsIntAvgWeakeningVarsNumRemoved, 0.5490196078431373 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 38 PreInvPairs, 39 NumberOfFragments, 47 HoareAnnotationTreeSize, 38 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 3910 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...