./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 ............................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/config using search string *Overflow*32bit*_Bitvector*.epf No suitable settings file found using Overflow*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 03:00:22,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:00:22,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:00:22,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:00:22,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:00:22,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:00:22,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:00:22,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:00:22,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:00:22,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:00:22,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:00:22,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:00:22,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:00:22,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:00:22,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:00:22,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:00:22,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:00:22,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:00:22,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:00:22,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:00:22,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:00:22,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:00:22,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:00:22,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:00:22,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:00:22,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:00:22,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:00:22,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:00:22,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:00:22,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:00:22,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:00:22,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:00:22,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:00:22,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:00:22,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:00:22,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:00:22,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:00:22,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:00:22,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:00:22,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:00:22,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:00:22,440 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-11-26 03:00:22,467 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:00:22,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:00:22,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:00:22,478 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:00:22,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:00:22,479 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:00:22,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 03:00:22,479 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:00:22,479 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:00:22,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 03:00:22,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 03:00:22,480 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:00:22,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 03:00:22,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 03:00:22,481 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 03:00:22,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:00:22,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 03:00:22,482 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 03:00:22,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:00:22,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 03:00:22,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:00:22,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 03:00:22,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:00:22,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 03:00:22,485 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 03:00:22,485 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 03:00:22,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 03:00:22,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 03:00:22,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:00:22,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:00:22,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:00:22,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:00:22,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:00:22,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:00:22,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 03:00:22,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 03:00:22,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 03:00:22,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 03:00:22,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:00:22,488 INFO L138 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/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2019-11-26 03:00:22,669 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:00:22,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:00:22,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:00:22,687 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:00:22,688 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:00:22,688 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/../../sv-benchmarks/c/recursive/Fibonacci03.c [2019-11-26 03:00:22,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/data/72e7c0458/8f8e0d96b93445f8a7a73e11e71ee65a/FLAGf0e8d58af [2019-11-26 03:00:23,127 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:00:23,127 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/sv-benchmarks/c/recursive/Fibonacci03.c [2019-11-26 03:00:23,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/data/72e7c0458/8f8e0d96b93445f8a7a73e11e71ee65a/FLAGf0e8d58af [2019-11-26 03:00:23,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/data/72e7c0458/8f8e0d96b93445f8a7a73e11e71ee65a [2019-11-26 03:00:23,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:00:23,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:00:23,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:00:23,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:00:23,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:00:23,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e635ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23, skipping insertion in model container [2019-11-26 03:00:23,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:00:23,587 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:00:23,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:00:23,784 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:00:23,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:00:23,876 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:00:23,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23 WrapperNode [2019-11-26 03:00:23,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:00:23,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:00:23,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:00:23,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:00:23,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:00:23,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:00:23,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:00:23,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:00:23,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... [2019-11-26 03:00:23,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:00:23,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:00:23,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:00:23,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:00:23,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/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 [2019-11-26 03:00:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-26 03:00:24,000 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-26 03:00:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:00:24,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:00:24,222 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:00:24,222 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 03:00:24,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:24 BoogieIcfgContainer [2019-11-26 03:00:24,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:00:24,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:00:24,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:00:24,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:00:24,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:00:23" (1/3) ... [2019-11-26 03:00:24,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42efeb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:00:24, skipping insertion in model container [2019-11-26 03:00:24,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:00:23" (2/3) ... [2019-11-26 03:00:24,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42efeb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:00:24, skipping insertion in model container [2019-11-26 03:00:24,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:00:24" (3/3) ... [2019-11-26 03:00:24,231 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2019-11-26 03:00:24,253 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:00:24,258 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-26 03:00:24,269 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-26 03:00:24,289 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:00:24,305 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 03:00:24,305 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:00:24,305 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:00:24,305 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:00:24,305 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:00:24,305 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:00:24,306 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:00:24,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-26 03:00:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 03:00:24,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:24,344 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:00:24,344 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 03:00:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:24,349 INFO L82 PathProgramCache]: Analyzing trace with hash 896995408, now seen corresponding path program 1 times [2019-11-26 03:00:24,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:24,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018912533] [2019-11-26 03:00:24,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:00:24,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018912533] [2019-11-26 03:00:24,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:00:24,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 03:00:24,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547787333] [2019-11-26 03:00:24,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 03:00:24,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:00:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 03:00:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 03:00:24,524 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2019-11-26 03:00:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:00:24,652 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-26 03:00:24,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 03:00:24,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 03:00:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:00:24,663 INFO L225 Difference]: With dead ends: 29 [2019-11-26 03:00:24,663 INFO L226 Difference]: Without dead ends: 22 [2019-11-26 03:00:24,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 03:00:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-26 03:00:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-26 03:00:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 03:00:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-26 03:00:24,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2019-11-26 03:00:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:00:24,704 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-26 03:00:24,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 03:00:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-26 03:00:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 03:00:24,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:24,705 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:00:24,706 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 03:00:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2037053914, now seen corresponding path program 1 times [2019-11-26 03:00:24,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:24,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444353039] [2019-11-26 03:00:24,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:00:24,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444353039] [2019-11-26 03:00:24,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:00:24,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 03:00:24,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780353812] [2019-11-26 03:00:24,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:00:24,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:00:24,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:00:24,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:00:24,735 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2019-11-26 03:00:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:00:24,756 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-11-26 03:00:24,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:00:24,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-26 03:00:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:00:24,759 INFO L225 Difference]: With dead ends: 24 [2019-11-26 03:00:24,759 INFO L226 Difference]: Without dead ends: 22 [2019-11-26 03:00:24,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:00:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-26 03:00:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-26 03:00:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 03:00:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-26 03:00:24,769 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2019-11-26 03:00:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:00:24,770 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-26 03:00:24,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:00:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-26 03:00:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-26 03:00:24,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:24,772 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:00:24,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 03:00:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1669486613, now seen corresponding path program 1 times [2019-11-26 03:00:24,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:24,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501363748] [2019-11-26 03:00:24,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-26 03:00:24,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501363748] [2019-11-26 03:00:24,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503775575] [2019-11-26 03:00:24,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:00:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:24,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 03:00:24,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:00:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 03:00:25,032 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:00:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-26 03:00:25,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-26 03:00:25,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 11 [2019-11-26 03:00:25,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289031348] [2019-11-26 03:00:25,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 03:00:25,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:00:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 03:00:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-26 03:00:25,103 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2019-11-26 03:00:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:00:25,208 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-26 03:00:25,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 03:00:25,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-26 03:00:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:00:25,210 INFO L225 Difference]: With dead ends: 41 [2019-11-26 03:00:25,211 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 03:00:25,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-26 03:00:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 03:00:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-26 03:00:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 03:00:25,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-26 03:00:25,219 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 29 [2019-11-26 03:00:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:00:25,219 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-26 03:00:25,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 03:00:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-26 03:00:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 03:00:25,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:25,223 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:00:25,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:00:25,435 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 03:00:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash -450174375, now seen corresponding path program 1 times [2019-11-26 03:00:25,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:25,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291115173] [2019-11-26 03:00:25,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-26 03:00:25,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291115173] [2019-11-26 03:00:25,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:00:25,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 03:00:25,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083685430] [2019-11-26 03:00:25,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 03:00:25,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 03:00:25,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 03:00:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-26 03:00:25,528 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-26 03:00:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:00:25,579 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-26 03:00:25,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 03:00:25,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-26 03:00:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:00:25,581 INFO L225 Difference]: With dead ends: 37 [2019-11-26 03:00:25,582 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 03:00:25,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 03:00:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 03:00:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-26 03:00:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-26 03:00:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-26 03:00:25,591 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 30 [2019-11-26 03:00:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:00:25,592 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-26 03:00:25,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 03:00:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-26 03:00:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-26 03:00:25,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:00:25,594 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:00:25,594 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 03:00:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:00:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1070503683, now seen corresponding path program 1 times [2019-11-26 03:00:25,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 03:00:25,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442417829] [2019-11-26 03:00:25,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 03:00:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-26 03:00:25,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442417829] [2019-11-26 03:00:25,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269180207] [2019-11-26 03:00:25,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7fbf1763-b617-49d3-880a-792d0e9d15a6/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:00:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:00:25,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 03:00:25,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:00:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-26 03:00:25,718 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:00:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-26 03:00:25,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061631902] [2019-11-26 03:00:25,791 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-26 03:00:25,791 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 03:00:25,797 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 03:00:26,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:00:26,001 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 03:00:26,006 INFO L168 Benchmark]: Toolchain (without parser) took 2451.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 951.4 MB in the beginning and 1.0 GB in the end (delta: -64.9 MB). Peak memory consumption was 102.3 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:26,006 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:00:26,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -211.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:26,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:00:26,008 INFO L168 Benchmark]: Boogie Preprocessor took 17.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:26,009 INFO L168 Benchmark]: RCFGBuilder took 296.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:26,009 INFO L168 Benchmark]: TraceAbstraction took 1779.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 120.6 MB). Peak memory consumption was 120.6 MB. Max. memory is 11.5 GB. [2019-11-26 03:00:26,012 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 322.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -211.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 296.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1779.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 120.6 MB). Peak memory consumption was 120.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...