./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-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_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 15:18:33,750 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 15:18:33,751 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 15:18:33,757 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 15:18:33,758 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 15:18:33,758 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 15:18:33,759 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 15:18:33,759 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 15:18:33,760 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 15:18:33,761 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 15:18:33,761 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 15:18:33,761 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 15:18:33,762 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 15:18:33,762 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 15:18:33,763 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 15:18:33,763 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 15:18:33,763 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 15:18:33,764 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 15:18:33,765 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 15:18:33,766 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 15:18:33,766 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 15:18:33,767 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 15:18:33,768 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 15:18:33,768 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 15:18:33,768 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 15:18:33,769 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 15:18:33,769 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 15:18:33,770 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 15:18:33,770 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 15:18:33,771 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 15:18:33,771 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 15:18:33,771 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 15:18:33,771 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 15:18:33,771 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 15:18:33,772 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 15:18:33,772 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 15:18:33,772 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 15:18:33,780 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 15:18:33,780 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 15:18:33,780 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 15:18:33,780 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 15:18:33,781 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 15:18:33,781 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 15:18:33,782 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 15:18:33,782 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 15:18:33,783 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:18:33,783 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 15:18:33,783 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 15:18:33,784 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 15:18:33,784 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 15:18:33,784 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 15:18:33,784 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 15:18:33,784 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d [2018-12-08 15:18:33,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 15:18:33,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 15:18:33,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 15:18:33,810 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 15:18:33,810 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 15:18:33,811 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c [2018-12-08 15:18:33,844 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/data/2f706e7a9/bccf6415c1144d92841304731071d39d/FLAG2ffc6f1ce [2018-12-08 15:18:34,257 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 15:18:34,257 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c [2018-12-08 15:18:34,261 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/data/2f706e7a9/bccf6415c1144d92841304731071d39d/FLAG2ffc6f1ce [2018-12-08 15:18:34,269 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/data/2f706e7a9/bccf6415c1144d92841304731071d39d [2018-12-08 15:18:34,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 15:18:34,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 15:18:34,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 15:18:34,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 15:18:34,274 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 15:18:34,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,276 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 08.12 03:18:34, skipping insertion in model container [2018-12-08 15:18:34,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 15:18:34,290 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 15:18:34,373 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:18:34,375 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 15:18:34,384 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:18:34,392 INFO L195 MainTranslator]: Completed translation [2018-12-08 15:18:34,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34 WrapperNode [2018-12-08 15:18:34,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 15:18:34,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 15:18:34,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 15:18:34,393 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 15:18:34,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 15:18:34,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 15:18:34,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 15:18:34,404 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 15:18:34,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... [2018-12-08 15:18:34,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 15:18:34,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 15:18:34,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 15:18:34,414 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 15:18:34,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:18:34,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 15:18:34,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 15:18:34,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 15:18:34,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 15:18:34,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 15:18:34,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 15:18:34,472 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-08 15:18:34,472 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-08 15:18:34,473 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-08 15:18:34,473 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-08 15:18:34,557 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 15:18:34,557 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 15:18:34,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:18:34 BoogieIcfgContainer [2018-12-08 15:18:34,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 15:18:34,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 15:18:34,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 15:18:34,560 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 15:18:34,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:18:34" (1/3) ... [2018-12-08 15:18:34,560 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 08.12 03:18:34, skipping insertion in model container [2018-12-08 15:18:34,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:18:34" (2/3) ... [2018-12-08 15:18:34,560 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 08.12 03:18:34, skipping insertion in model container [2018-12-08 15:18:34,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:18:34" (3/3) ... [2018-12-08 15:18:34,561 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4_false-unreach-call_true-termination.c [2018-12-08 15:18:34,567 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 15:18:34,571 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 15:18:34,579 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 15:18:34,597 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 15:18:34,597 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 15:18:34,597 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 15:18:34,597 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 15:18:34,598 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 15:18:34,598 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 15:18:34,598 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 15:18:34,598 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 15:18:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-08 15:18:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 15:18:34,611 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:34,611 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:18:34,612 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:34,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-08 15:18:34,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:34,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:34,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:18:34,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:34,647 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:18:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:18:34,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:18:34,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 15:18:34,717 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:18:34,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:18:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:18:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:18:34,729 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-08 15:18:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:18:34,780 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-08 15:18:34,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:18:34,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 15:18:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:18:34,787 INFO L225 Difference]: With dead ends: 44 [2018-12-08 15:18:34,787 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 15:18:34,789 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 [2018-12-08 15:18:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 15:18:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-08 15:18:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 15:18:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-08 15:18:34,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-08 15:18:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:18:34,815 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-08 15:18:34,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:18:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-08 15:18:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 15:18:34,816 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:34,816 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:18:34,816 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:34,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-08 15:18:34,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:34,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:34,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:18:34,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:34,817 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:18:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:18:34,840 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:18:34,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 15:18:34,841 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:18:34,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:18:34,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:18:34,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:18:34,842 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-08 15:18:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:18:34,874 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-08 15:18:34,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:18:34,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 15:18:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:18:34,876 INFO L225 Difference]: With dead ends: 36 [2018-12-08 15:18:34,876 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 15:18:34,877 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 [2018-12-08 15:18:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 15:18:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-08 15:18:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 15:18:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-08 15:18:34,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-08 15:18:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:18:34,883 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-08 15:18:34,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:18:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-08 15:18:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 15:18:34,884 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:34,884 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] [2018-12-08 15:18:34,884 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:34,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-08 15:18:34,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:34,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:34,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:18:34,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:34,885 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:18:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:18:34,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:18:34,938 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:18:34,939 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-08 15:18:34,940 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-12-08 15:18:34,960 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:18:34,960 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:18:35,027 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 15:18:35,028 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-12-08 15:18:35,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:35,034 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 15:18:35,060 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-12-08 15:18:35,060 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 15:18:35,072 INFO L418 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-12-08 15:18:35,072 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 15:18:35,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:18:35,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-12-08 15:18:35,072 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:18:35,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 15:18:35,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 15:18:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-08 15:18:35,073 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-12-08 15:18:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:18:35,193 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-12-08 15:18:35,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 15:18:35,193 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-12-08 15:18:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:18:35,194 INFO L225 Difference]: With dead ends: 72 [2018-12-08 15:18:35,195 INFO L226 Difference]: Without dead ends: 48 [2018-12-08 15:18:35,195 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:18:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-08 15:18:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-12-08 15:18:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-08 15:18:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-12-08 15:18:35,203 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-12-08 15:18:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:18:35,203 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-12-08 15:18:35,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 15:18:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-12-08 15:18:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-08 15:18:35,205 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:35,205 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] [2018-12-08 15:18:35,205 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:35,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-08 15:18:35,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:35,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:35,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:18:35,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:35,206 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:18:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 15:18:35,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:18:35,252 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:18:35,252 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-08 15:18:35,253 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-08 15:18:35,254 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:18:35,254 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:18:35,264 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 15:18:35,265 INFO L272 AbstractInterpreter]: Visited 16 different actions 25 times. Never merged. Never widened. Performed 41 root evaluator evaluations with a maximum evaluation depth of 3. Performed 41 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-12-08 15:18:35,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:35,266 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 15:18:35,281 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-12-08 15:18:35,281 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 15:18:35,306 INFO L418 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-12-08 15:18:35,306 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 15:18:35,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:18:35,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-12-08 15:18:35,306 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:18:35,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 15:18:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 15:18:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:18:35,307 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-12-08 15:18:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:18:35,464 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-12-08 15:18:35,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 15:18:35,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-08 15:18:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:18:35,465 INFO L225 Difference]: With dead ends: 87 [2018-12-08 15:18:35,465 INFO L226 Difference]: Without dead ends: 55 [2018-12-08 15:18:35,465 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-08 15:18:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-08 15:18:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-08 15:18:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-08 15:18:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-12-08 15:18:35,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-12-08 15:18:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:18:35,471 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-12-08 15:18:35,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 15:18:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-12-08 15:18:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-08 15:18:35,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:35,472 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:18:35,472 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:35,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-12-08 15:18:35,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:35,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:35,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:18:35,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:35,473 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:18:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 15:18:35,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:18:35,515 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:18:35,515 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 15:18:35,516 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 15:18:35,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:18:35,516 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:18:35,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:18:35,522 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 15:18:35,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 15:18:35,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:18:35,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:18:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-08 15:18:35,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:18:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-08 15:18:35,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:18:35,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2018-12-08 15:18:35,818 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:18:35,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 15:18:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 15:18:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-12-08 15:18:35,819 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-12-08 15:18:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:18:35,964 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-12-08 15:18:35,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 15:18:35,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-12-08 15:18:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:18:35,966 INFO L225 Difference]: With dead ends: 121 [2018-12-08 15:18:35,966 INFO L226 Difference]: Without dead ends: 76 [2018-12-08 15:18:35,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-12-08 15:18:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-08 15:18:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-12-08 15:18:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-08 15:18:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-08 15:18:35,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-12-08 15:18:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:18:35,973 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-08 15:18:35,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 15:18:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-08 15:18:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-08 15:18:35,974 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:35,974 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:18:35,974 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:35,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-12-08 15:18:35,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:35,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:35,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:18:35,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:35,975 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:18:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-08 15:18:36,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:18:36,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:18:36,024 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-12-08 15:18:36,024 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-08 15:18:36,025 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:18:36,026 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:18:36,045 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 15:18:36,045 INFO L272 AbstractInterpreter]: Visited 29 different actions 68 times. Never merged. Never widened. Performed 128 root evaluator evaluations with a maximum evaluation depth of 4. Performed 128 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 5 variables. [2018-12-08 15:18:36,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:36,047 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 15:18:36,081 INFO L227 lantSequenceWeakener]: Weakened 34 states. On average, predicates are now at 48.04% of their original sizes. [2018-12-08 15:18:36,082 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 15:18:36,305 INFO L418 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-12-08 15:18:36,305 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 15:18:36,305 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:18:36,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [27] imperfect sequences [7] total 32 [2018-12-08 15:18:36,306 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:18:36,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-08 15:18:36,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-08 15:18:36,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2018-12-08 15:18:36,306 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 27 states. [2018-12-08 15:18:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:18:37,272 INFO L93 Difference]: Finished difference Result 127 states and 162 transitions. [2018-12-08 15:18:37,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-08 15:18:37,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2018-12-08 15:18:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:18:37,273 INFO L225 Difference]: With dead ends: 127 [2018-12-08 15:18:37,273 INFO L226 Difference]: Without dead ends: 86 [2018-12-08 15:18:37,275 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2018-12-08 15:18:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-08 15:18:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2018-12-08 15:18:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-08 15:18:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2018-12-08 15:18:37,283 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 55 [2018-12-08 15:18:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:18:37,283 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2018-12-08 15:18:37,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-08 15:18:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2018-12-08 15:18:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-08 15:18:37,285 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:18:37,285 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:18:37,285 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:18:37,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:18:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2018-12-08 15:18:37,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:18:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:37,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:18:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:18:37,287 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:18:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 15:18:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 15:18:37,320 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 15:18:37,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:18:37 BoogieIcfgContainer [2018-12-08 15:18:37,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 15:18:37,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 15:18:37,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 15:18:37,336 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 15:18:37,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:18:34" (3/4) ... [2018-12-08 15:18:37,338 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 15:18:37,366 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_99f60045-5942-427d-8e8d-91f8b04d2ceb/bin-2019/utaipan/witness.graphml [2018-12-08 15:18:37,366 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 15:18:37,366 INFO L168 Benchmark]: Toolchain (without parser) took 3095.43 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 221.8 MB). Free memory was 962.4 MB in the beginning and 892.2 MB in the end (delta: 70.2 MB). Peak memory consumption was 292.0 MB. Max. memory is 11.5 GB. [2018-12-08 15:18:37,367 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:18:37,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 120.08 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:18:37,368 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.90 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:18:37,368 INFO L168 Benchmark]: Boogie Preprocessor took 10.21 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:18:37,368 INFO L168 Benchmark]: RCFGBuilder took 143.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -182.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-08 15:18:37,369 INFO L168 Benchmark]: TraceAbstraction took 2777.69 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 899.9 MB in the end (delta: 234.3 MB). Peak memory consumption was 302.9 MB. Max. memory is 11.5 GB. [2018-12-08 15:18:37,369 INFO L168 Benchmark]: Witness Printer took 30.23 ms. Allocated memory is still 1.3 GB. Free memory was 899.9 MB in the beginning and 892.2 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2018-12-08 15:18:37,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 120.08 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 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 10.90 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.21 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -182.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2777.69 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 899.9 MB in the end (delta: 234.3 MB). Peak memory consumption was 302.9 MB. Max. memory is 11.5 GB. * Witness Printer took 30.23 ms. Allocated memory is still 1.3 GB. Free memory was 899.9 MB in the beginning and 892.2 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; VAL [x=4] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L37] int result = fibo1(x); [L38] COND TRUE result == 3 VAL [result=3, x=4] [L39] __VERIFIER_error() VAL [result=3, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 2.7s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 194 SDtfs, 166 SDslu, 1409 SDs, 0 SdLazy, 510 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 271 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 3 AbstIntIterations, 3 AbstIntStrong, 0.7934472934472937 AbsIntWeakeningRatio, 0.5641025641025641 AbsIntAvgWeakeningVarsNumRemoved, 0.452991452991453 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 27 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 295 ConstructedInterpolants, 0 QuantifiedInterpolants, 21787 SizeOfPredicates, 4 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 145/189 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...