./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 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer --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 Automizer --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 0.1.23-635dfa2 [2018-12-09 11:07:57,868 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 11:07:57,869 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 11:07:57,877 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 11:07:57,878 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 11:07:57,878 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 11:07:57,879 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 11:07:57,880 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 11:07:57,881 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 11:07:57,882 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 11:07:57,883 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 11:07:57,883 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 11:07:57,883 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 11:07:57,884 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 11:07:57,885 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 11:07:57,885 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 11:07:57,886 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 11:07:57,887 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 11:07:57,888 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 11:07:57,890 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 11:07:57,890 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 11:07:57,891 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 11:07:57,893 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 11:07:57,893 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 11:07:57,893 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 11:07:57,894 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 11:07:57,895 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 11:07:57,895 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 11:07:57,896 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 11:07:57,896 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 11:07:57,897 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 11:07:57,897 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 11:07:57,897 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 11:07:57,897 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 11:07:57,898 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 11:07:57,898 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 11:07:57,899 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-09 11:07:57,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 11:07:57,909 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 11:07:57,909 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 11:07:57,909 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 11:07:57,910 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 11:07:57,910 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 11:07:57,910 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 11:07:57,910 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 11:07:57,910 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 11:07:57,910 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 11:07:57,910 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 11:07:57,910 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 11:07:57,911 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 11:07:57,911 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 11:07:57,912 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 11:07:57,912 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 [2018-12-09 11:07:57,935 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 11:07:57,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 11:07:57,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 11:07:57,948 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 11:07:57,948 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 11:07:57,948 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2_true-unreach-call_true-termination.c [2018-12-09 11:07:57,990 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/data/c7dbcb64e/7c4b157a4c52409da5d9317e658694f5/FLAG08763d703 [2018-12-09 11:07:58,291 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 11:07:58,291 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/sv-benchmarks/c/recursive-simple/fibo_2calls_2_true-unreach-call_true-termination.c [2018-12-09 11:07:58,295 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/data/c7dbcb64e/7c4b157a4c52409da5d9317e658694f5/FLAG08763d703 [2018-12-09 11:07:58,304 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/data/c7dbcb64e/7c4b157a4c52409da5d9317e658694f5 [2018-12-09 11:07:58,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 11:07:58,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 11:07:58,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 11:07:58,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 11:07:58,309 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 11:07:58,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c04efe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58, skipping insertion in model container [2018-12-09 11:07:58,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 11:07:58,325 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 11:07:58,411 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 11:07:58,414 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 11:07:58,423 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 11:07:58,431 INFO L195 MainTranslator]: Completed translation [2018-12-09 11:07:58,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58 WrapperNode [2018-12-09 11:07:58,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 11:07:58,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 11:07:58,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 11:07:58,432 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 11:07:58,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 11:07:58,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 11:07:58,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 11:07:58,445 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 11:07:58,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... [2018-12-09 11:07:58,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 11:07:58,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 11:07:58,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 11:07:58,455 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 11:07:58,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 11:07:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 11:07:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 11:07:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 11:07:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 11:07:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 11:07:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 11:07:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-09 11:07:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-09 11:07:58,521 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-09 11:07:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-09 11:07:58,613 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 11:07:58,613 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 11:07:58,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:07:58 BoogieIcfgContainer [2018-12-09 11:07:58,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 11:07:58,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 11:07:58,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 11:07:58,615 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 11:07:58,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:07:58" (1/3) ... [2018-12-09 11:07:58,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243050a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:07:58, skipping insertion in model container [2018-12-09 11:07:58,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:07:58" (2/3) ... [2018-12-09 11:07:58,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243050a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:07:58, skipping insertion in model container [2018-12-09 11:07:58,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:07:58" (3/3) ... [2018-12-09 11:07:58,617 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2_true-unreach-call_true-termination.c [2018-12-09 11:07:58,623 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 11:07:58,627 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 11:07:58,635 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 11:07:58,653 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 11:07:58,653 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 11:07:58,653 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 11:07:58,653 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 11:07:58,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 11:07:58,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 11:07:58,653 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 11:07:58,653 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 11:07:58,654 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 11:07:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-09 11:07:58,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 11:07:58,667 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:07:58,667 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:07:58,668 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:07:58,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:07:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-09 11:07:58,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 11:07:58,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 11:07:58,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:58,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:58,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:07:58,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 11:07:58,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 11:07:58,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 11:07:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 11:07:58,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 11:07:58,781 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-09 11:07:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:07:58,833 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-09 11:07:58,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 11:07:58,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 11:07:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:07:58,840 INFO L225 Difference]: With dead ends: 44 [2018-12-09 11:07:58,840 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 11:07:58,842 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 [2018-12-09 11:07:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 11:07:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-09 11:07:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 11:07:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-09 11:07:58,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-09 11:07:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:07:58,867 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-09 11:07:58,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 11:07:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-09 11:07:58,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 11:07:58,868 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:07:58,868 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:07:58,868 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:07:58,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:07:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-09 11:07:58,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 11:07:58,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 11:07:58,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:58,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:58,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:07:58,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 11:07:58,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 11:07:58,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 11:07:58,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 11:07:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 11:07:58,898 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-09 11:07:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:07:58,932 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-09 11:07:58,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 11:07:58,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-09 11:07:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:07:58,934 INFO L225 Difference]: With dead ends: 36 [2018-12-09 11:07:58,934 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 11:07:58,934 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 [2018-12-09 11:07:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 11:07:58,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-09 11:07:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 11:07:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-09 11:07:58,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-09 11:07:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:07:58,938 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-09 11:07:58,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 11:07:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-09 11:07:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-09 11:07:58,939 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:07:58,939 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] [2018-12-09 11:07:58,939 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:07:58,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:07:58,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-09 11:07:58,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 11:07:58,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 11:07:58,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:58,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:58,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 11:07:58,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:07:58,974 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:07:58,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:58,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:07:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 11:07:59,033 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 11:07:59,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-09 11:07:59,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 11:07:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 11:07:59,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 11:07:59,034 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 6 states. [2018-12-09 11:07:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:07:59,072 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-09 11:07:59,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 11:07:59,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-12-09 11:07:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:07:59,073 INFO L225 Difference]: With dead ends: 58 [2018-12-09 11:07:59,073 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 11:07:59,073 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-09 11:07:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 11:07:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-09 11:07:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 11:07:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-09 11:07:59,077 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-09 11:07:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:07:59,077 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-09 11:07:59,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 11:07:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-09 11:07:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 11:07:59,078 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:07:59,078 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] [2018-12-09 11:07:59,078 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:07:59,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:07:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-09 11:07:59,079 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 11:07:59,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 11:07:59,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:59,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:59,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 11:07:59,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:07:59,150 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:07:59,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:59,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:07:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 11:07:59,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 11:07:59,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-09 11:07:59,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 11:07:59,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 11:07:59,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-09 11:07:59,212 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2018-12-09 11:07:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:07:59,238 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2018-12-09 11:07:59,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 11:07:59,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2018-12-09 11:07:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:07:59,239 INFO L225 Difference]: With dead ends: 46 [2018-12-09 11:07:59,239 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 11:07:59,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-09 11:07:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 11:07:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2018-12-09 11:07:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 11:07:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-09 11:07:59,244 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-09 11:07:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:07:59,244 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-09 11:07:59,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 11:07:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-09 11:07:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 11:07:59,245 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:07:59,245 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 11:07:59,245 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:07:59,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:07:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2018-12-09 11:07:59,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 11:07:59,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 11:07:59,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:59,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:59,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 11:07:59,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 11:07:59,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 11:07:59,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 11:07:59,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 11:07:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 11:07:59,284 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2018-12-09 11:07:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:07:59,350 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2018-12-09 11:07:59,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 11:07:59,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-12-09 11:07:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:07:59,351 INFO L225 Difference]: With dead ends: 44 [2018-12-09 11:07:59,351 INFO L226 Difference]: Without dead ends: 40 [2018-12-09 11:07:59,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-09 11:07:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-09 11:07:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-12-09 11:07:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 11:07:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-09 11:07:59,356 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2018-12-09 11:07:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:07:59,356 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-09 11:07:59,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 11:07:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-09 11:07:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 11:07:59,357 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 11:07:59,357 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1] [2018-12-09 11:07:59,357 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 11:07:59,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 11:07:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-09 11:07:59,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 11:07:59,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 11:07:59,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:59,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:59,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 11:07:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 11:07:59,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 11:07:59,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 11:07:59,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 11:07:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 11:07:59,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 11:07:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 11:07:59,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 11:07:59,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2018-12-09 11:07:59,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 11:07:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 11:07:59,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-12-09 11:07:59,494 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 12 states. [2018-12-09 11:07:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 11:07:59,614 INFO L93 Difference]: Finished difference Result 69 states and 101 transitions. [2018-12-09 11:07:59,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 11:07:59,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2018-12-09 11:07:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 11:07:59,615 INFO L225 Difference]: With dead ends: 69 [2018-12-09 11:07:59,615 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 11:07:59,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-12-09 11:07:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 11:07:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 11:07:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 11:07:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 11:07:59,616 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-12-09 11:07:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 11:07:59,617 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 11:07:59,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 11:07:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 11:07:59,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 11:07:59,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 11:07:59,716 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 11:07:59,716 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 11:07:59,716 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 11:07:59,716 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 11:07:59,716 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-09 11:07:59,717 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-09 11:07:59,717 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-09 11:07:59,717 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-09 11:07:59,718 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse0 (<= 3 |fibo1_#in~n|) .cse1) (and .cse0 (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse1))) [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-09 11:07:59,718 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-09 11:07:59,719 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-09 11:07:59,719 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-09 11:07:59,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:07:59 BoogieIcfgContainer [2018-12-09 11:07:59,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 11:07:59,721 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 11:07:59,721 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 11:07:59,721 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 11:07:59,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:07:58" (3/4) ... [2018-12-09 11:07:59,723 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 11:07:59,727 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 11:07:59,728 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 11:07:59,728 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-09 11:07:59,728 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-09 11:07:59,730 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 11:07:59,731 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 11:07:59,731 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 11:07:59,757 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1bae809b-c782-430d-b167-6ae8137ea10a/bin-2019/uautomizer/witness.graphml [2018-12-09 11:07:59,757 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 11:07:59,758 INFO L168 Benchmark]: Toolchain (without parser) took 1451.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 956.0 MB in the beginning and 898.9 MB in the end (delta: 57.1 MB). Peak memory consumption was 174.1 MB. Max. memory is 11.5 GB. [2018-12-09 11:07:59,758 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:07:59,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.06 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 11:07:59,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.19 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:07:59,759 INFO L168 Benchmark]: Boogie Preprocessor took 10.23 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:07:59,759 INFO L168 Benchmark]: RCFGBuilder took 158.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-09 11:07:59,759 INFO L168 Benchmark]: TraceAbstraction took 1106.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 898.9 MB in the end (delta: 204.3 MB). Peak memory consumption was 204.3 MB. Max. memory is 11.5 GB. [2018-12-09 11:07:59,760 INFO L168 Benchmark]: Witness Printer took 36.33 ms. Allocated memory is still 1.1 GB. Free memory is still 898.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 11:07:59,761 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 125.06 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 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 12.19 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.23 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1106.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 898.9 MB in the end (delta: 204.3 MB). Peak memory consumption was 204.3 MB. Max. memory is 11.5 GB. * Witness Printer took 36.33 ms. Allocated memory is still 1.1 GB. Free memory is still 898.9 MB. There was no memory consumed. 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, 1.0s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 177 SDtfs, 86 SDslu, 681 SDs, 0 SdLazy, 372 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 50 PreInvPairs, 59 NumberOfFragments, 70 HoareAnnotationTreeSize, 50 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 239 NumberOfCodeBlocks, 239 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 13476 SizeOfPredicates, 6 NumberOfNonLiveVariables, 208 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 36/53 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...