./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01-1.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_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/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 bec5669c6fe02e51518958076fea4487ada345cf ..................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/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 02:37:52,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:37:52,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:37:52,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:37:52,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:37:52,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:37:52,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:37:52,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:37:52,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:37:52,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:37:52,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:37:52,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:37:52,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:37:52,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:37:52,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:37:52,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:37:52,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:37:52,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:37:52,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:37:52,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:37:52,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:37:52,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:37:52,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:37:52,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:37:52,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:37:52,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:37:52,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:37:52,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:37:52,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:37:52,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:37:52,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:37:52,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:37:52,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:37:52,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:37:52,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:37:52,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:37:52,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:37:52,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:37:52,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:37:52,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:37:52,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:37:52,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-11-26 02:37:52,324 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:37:52,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:37:52,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:37:52,334 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:37:52,334 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:37:52,334 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:37:52,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:37:52,334 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:37:52,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:37:52,335 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:37:52,336 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:37:52,336 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:37:52,336 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:37:52,336 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:37:52,337 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:37:52,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:37:52,338 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:37:52,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:37:52,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:37:52,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:37:52,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:37:52,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:37:52,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:37:52,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:37:52,339 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:37:52,340 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:37:52,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:37:52,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:37:52,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:37:52,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:37:52,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:37:52,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:37:52,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:37:52,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:37:52,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:37:52,342 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:37:52,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:37:52,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:37:52,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:37:52,343 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_76af8748-54e7-4b5f-a54a-535ff044f5d5/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 -> bec5669c6fe02e51518958076fea4487ada345cf [2019-11-26 02:37:52,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:37:52,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:37:52,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:37:52,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:37:52,495 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:37:52,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2019-11-26 02:37:52,554 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/data/955f3483b/0aec4c6177454cc9ad5f7a492d0dcfb7/FLAGa0d18288f [2019-11-26 02:37:52,951 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:37:52,952 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/sv-benchmarks/c/recursive/EvenOdd01-1.c [2019-11-26 02:37:52,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/data/955f3483b/0aec4c6177454cc9ad5f7a492d0dcfb7/FLAGa0d18288f [2019-11-26 02:37:52,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/bin/utaipan/data/955f3483b/0aec4c6177454cc9ad5f7a492d0dcfb7 [2019-11-26 02:37:52,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:37:52,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:37:52,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:37:52,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:37:52,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:37:52,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:37:52" (1/1) ... [2019-11-26 02:37:52,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4021b628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:52, skipping insertion in model container [2019-11-26 02:37:52,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:37:52" (1/1) ... [2019-11-26 02:37:52,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:37:53,014 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:37:53,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:37:53,212 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:37:53,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:37:53,301 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:37:53,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53 WrapperNode [2019-11-26 02:37:53,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:37:53,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:37:53,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:37:53,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:37:53,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:37:53,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:37:53,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:37:53,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:37:53,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... [2019-11-26 02:37:53,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:37:53,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:37:53,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:37:53,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:37:53,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/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 02:37:53,393 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2019-11-26 02:37:53,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2019-11-26 02:37:53,394 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2019-11-26 02:37:53,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2019-11-26 02:37:53,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:37:53,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:37:53,598 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:37:53,598 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:37:53,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:53 BoogieIcfgContainer [2019-11-26 02:37:53,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:37:53,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:37:53,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:37:53,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:37:53,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:37:52" (1/3) ... [2019-11-26 02:37:53,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250d084e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:37:53, skipping insertion in model container [2019-11-26 02:37:53,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:37:53" (2/3) ... [2019-11-26 02:37:53,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250d084e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:37:53, skipping insertion in model container [2019-11-26 02:37:53,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:37:53" (3/3) ... [2019-11-26 02:37:53,605 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2019-11-26 02:37:53,614 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:37:53,619 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-26 02:37:53,629 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-26 02:37:53,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:37:53,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:37:53,651 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:37:53,651 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:37:53,651 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:37:53,652 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:37:53,652 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:37:53,653 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:37:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-26 02:37:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:37:53,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:53,689 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:53,690 INFO L410 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:37:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2104858774, now seen corresponding path program 1 times [2019-11-26 02:37:53,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:37:53,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815208680] [2019-11-26 02:37:53,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:37:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:53,842 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 02:37:53,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815208680] [2019-11-26 02:37:53,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:53,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:37:53,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491951710] [2019-11-26 02:37:53,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:37:53,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:37:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:37:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:37:53,860 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-26 02:37:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:53,981 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-26 02:37:53,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:37:53,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 02:37:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:53,990 INFO L225 Difference]: With dead ends: 41 [2019-11-26 02:37:53,991 INFO L226 Difference]: Without dead ends: 26 [2019-11-26 02:37:53,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 02:37:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-26 02:37:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-11-26 02:37:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:37:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-26 02:37:54,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2019-11-26 02:37:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:54,022 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-26 02:37:54,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:37:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-26 02:37:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:37:54,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:54,023 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:54,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:37:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 826112612, now seen corresponding path program 1 times [2019-11-26 02:37:54,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:37:54,025 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072861309] [2019-11-26 02:37:54,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:37:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:54,061 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 02:37:54,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072861309] [2019-11-26 02:37:54,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:54,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:37:54,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997002398] [2019-11-26 02:37:54,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:37:54,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:37:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:37:54,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:37:54,064 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 5 states. [2019-11-26 02:37:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:54,109 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-26 02:37:54,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:37:54,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:37:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:54,110 INFO L225 Difference]: With dead ends: 26 [2019-11-26 02:37:54,111 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:37:54,111 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 02:37:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:37:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-26 02:37:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-26 02:37:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-26 02:37:54,115 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2019-11-26 02:37:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:54,116 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-26 02:37:54,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:37:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-26 02:37:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:37:54,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:54,117 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:54,117 INFO L410 AbstractCegarLoop]: === Iteration 3 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:37:54,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:54,117 INFO L82 PathProgramCache]: Analyzing trace with hash -345822603, now seen corresponding path program 1 times [2019-11-26 02:37:54,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:37:54,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958362962] [2019-11-26 02:37:54,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:37:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:54,184 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 02:37:54,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958362962] [2019-11-26 02:37:54,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:54,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:37:54,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736259456] [2019-11-26 02:37:54,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:37:54,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:37:54,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:37:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:37:54,187 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2019-11-26 02:37:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:54,269 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-26 02:37:54,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:37:54,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-26 02:37:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:54,270 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:37:54,270 INFO L226 Difference]: Without dead ends: 22 [2019-11-26 02:37:54,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:37:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-26 02:37:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-26 02:37:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 02:37:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-26 02:37:54,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2019-11-26 02:37:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:54,276 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-26 02:37:54,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:37:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-26 02:37:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:37:54,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:54,277 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:54,277 INFO L410 AbstractCegarLoop]: === Iteration 4 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:37:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2130566059, now seen corresponding path program 1 times [2019-11-26 02:37:54,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:37:54,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040943675] [2019-11-26 02:37:54,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:37:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:54,333 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 02:37:54,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040943675] [2019-11-26 02:37:54,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:37:54,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-26 02:37:54,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415673281] [2019-11-26 02:37:54,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:37:54,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:37:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:37:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:37:54,335 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2019-11-26 02:37:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:37:54,436 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-26 02:37:54,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:37:54,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-26 02:37:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:37:54,439 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:37:54,439 INFO L226 Difference]: Without dead ends: 29 [2019-11-26 02:37:54,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:37:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-26 02:37:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-26 02:37:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-26 02:37:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-26 02:37:54,447 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 14 [2019-11-26 02:37:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:37:54,448 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-26 02:37:54,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:37:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-26 02:37:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-26 02:37:54,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:37:54,450 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:37:54,450 INFO L410 AbstractCegarLoop]: === Iteration 5 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:37:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:37:54,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1256120232, now seen corresponding path program 1 times [2019-11-26 02:37:54,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:37:54,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511347908] [2019-11-26 02:37:54,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:37:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:54,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511347908] [2019-11-26 02:37:54,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112229966] [2019-11-26 02:37:54,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_76af8748-54e7-4b5f-a54a-535ff044f5d5/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 02:37:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:37:54,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:37:54,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:37:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:54,639 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:37:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:37:54,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925719933] [2019-11-26 02:37:54,787 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-26 02:37:54,788 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:37:54,793 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:37:55,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:37:55,005 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 02:37:55,009 INFO L168 Benchmark]: Toolchain (without parser) took 2034.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 943.4 MB in the beginning and 1.0 GB in the end (delta: -95.8 MB). Peak memory consumption was 74.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:55,010 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:37:55,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -224.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:55,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.25 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 02:37:55,011 INFO L168 Benchmark]: Boogie Preprocessor took 16.18 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:55,012 INFO L168 Benchmark]: RCFGBuilder took 253.63 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:55,012 INFO L168 Benchmark]: TraceAbstraction took 1407.48 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: 102.1 MB). Peak memory consumption was 102.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:37:55,016 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 324.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -224.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.25 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 16.18 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 253.63 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1407.48 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: 102.1 MB). Peak memory consumption was 102.1 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...