./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/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 30601811463d073f869bef96a3132d41c5e6f5ce ................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:43:31,735 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:43:31,736 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:43:31,745 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:43:31,745 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:43:31,746 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:43:31,747 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:43:31,748 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:43:31,749 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:43:31,749 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:43:31,750 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:43:31,750 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:43:31,751 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:43:31,752 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:43:31,752 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:43:31,753 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:43:31,754 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:43:31,755 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:43:31,756 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:43:31,757 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:43:31,759 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:43:31,759 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:43:31,761 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:43:31,761 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:43:31,762 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:43:31,763 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:43:31,763 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:43:31,764 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:43:31,764 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:43:31,765 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:43:31,765 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:43:31,767 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:43:31,767 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:43:31,767 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:43:31,767 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:43:31,768 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:43:31,768 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:43:31,779 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:43:31,779 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:43:31,780 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:43:31,780 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:43:31,780 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:43:31,780 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:43:31,780 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:43:31,780 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:43:31,781 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:43:31,781 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:43:31,781 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:43:31,781 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:43:31,781 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:43:31,783 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:43:31,783 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:43:31,783 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:43:31,783 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:43:31,783 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:43:31,784 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:43:31,785 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:43:31,785 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:43:31,785 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:43:31,785 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:43:31,785 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:43:31,785 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:43:31,785 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:43:31,785 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:43:31,786 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:43:31,786 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:43:31,786 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:43:31,786 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:43:31,786 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_e6dac9a5-2206-475c-a1ac-8a5c556c2652/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 -> 30601811463d073f869bef96a3132d41c5e6f5ce [2018-11-18 11:43:31,810 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:43:31,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:43:31,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:43:31,823 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:43:31,823 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:43:31,824 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/afterrec_true-unreach-call_true-termination.c [2018-11-18 11:43:31,868 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/data/ac83eb33c/3a34f02c4aae47e99b7b53f8c58c959c/FLAG5e1cd966e [2018-11-18 11:43:32,287 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:43:32,288 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/sv-benchmarks/c/recursive-simple/afterrec_true-unreach-call_true-termination.c [2018-11-18 11:43:32,292 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/data/ac83eb33c/3a34f02c4aae47e99b7b53f8c58c959c/FLAG5e1cd966e [2018-11-18 11:43:32,302 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/data/ac83eb33c/3a34f02c4aae47e99b7b53f8c58c959c [2018-11-18 11:43:32,304 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:43:32,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:43:32,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:43:32,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:43:32,309 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:43:32,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644a6f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32, skipping insertion in model container [2018-11-18 11:43:32,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:43:32,336 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:43:32,438 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:43:32,440 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:43:32,448 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:43:32,455 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:43:32,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32 WrapperNode [2018-11-18 11:43:32,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:43:32,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:43:32,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:43:32,456 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:43:32,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:43:32,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:43:32,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:43:32,468 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:43:32,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... [2018-11-18 11:43:32,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:43:32,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:43:32,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:43:32,480 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:43:32,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:43:32,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:43:32,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:43:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure f [2018-11-18 11:43:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2018-11-18 11:43:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:43:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:43:32,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:43:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:43:32,624 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:43:32,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:43:32 BoogieIcfgContainer [2018-11-18 11:43:32,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:43:32,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:43:32,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:43:32,627 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:43:32,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:43:32" (1/3) ... [2018-11-18 11:43:32,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5070261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:43:32, skipping insertion in model container [2018-11-18 11:43:32,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:43:32" (2/3) ... [2018-11-18 11:43:32,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5070261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:43:32, skipping insertion in model container [2018-11-18 11:43:32,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:43:32" (3/3) ... [2018-11-18 11:43:32,629 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_true-unreach-call_true-termination.c [2018-11-18 11:43:32,635 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:43:32,639 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:43:32,648 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:43:32,667 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:43:32,667 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:43:32,667 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:43:32,667 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:43:32,667 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:43:32,667 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:43:32,667 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:43:32,667 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:43:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-11-18 11:43:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-18 11:43:32,682 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:43:32,683 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:43:32,685 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:43:32,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:32,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1715138264, now seen corresponding path program 1 times [2018-11-18 11:43:32,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:43:32,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:32,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:43:32,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:43:32,719 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:43:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:43:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:43:32,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:43:32,786 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:43:32,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-11-18 11:43:32,788 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [5], [8], [10], [16], [17], [18], [19], [20], [22] [2018-11-18 11:43:32,810 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:43:32,811 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:43:32,898 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 11:43:32,899 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 9 root evaluator evaluations with a maximum evaluation depth of 3. Performed 9 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 3 variables. [2018-11-18 11:43:32,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:43:32,906 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 11:43:32,943 INFO L227 lantSequenceWeakener]: Weakened 1 states. On average, predicates are now at 50% of their original sizes. [2018-11-18 11:43:32,944 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 11:43:32,956 INFO L415 sIntCurrentIteration]: We unified 15 AI predicates to 15 [2018-11-18 11:43:32,956 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 11:43:32,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:43:32,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-11-18 11:43:32,957 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:43:32,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 11:43:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 11:43:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 11:43:32,964 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2018-11-18 11:43:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:43:33,004 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-11-18 11:43:33,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 11:43:33,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-11-18 11:43:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:43:33,011 INFO L225 Difference]: With dead ends: 24 [2018-11-18 11:43:33,011 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 11:43:33,014 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:43:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 11:43:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 11:43:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 11:43:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 11:43:33,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-11-18 11:43:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:43:33,035 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:43:33,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 11:43:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:43:33,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:43:33,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 11:43:33,052 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point fEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (not (= |f_#in~n| 2)) [2018-11-18 11:43:33,052 INFO L428 ceAbstractionStarter]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point L6-1(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point fFINAL(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:43:33,052 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 11:43:33,053 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 11:43:33,053 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 11:43:33,053 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true [2018-11-18 11:43:33,053 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 12) no Hoare annotation was computed. [2018-11-18 11:43:33,053 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 12) no Hoare annotation was computed. [2018-11-18 11:43:33,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:43:33 BoogieIcfgContainer [2018-11-18 11:43:33,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:43:33,055 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:43:33,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:43:33,055 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:43:33,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:43:32" (3/4) ... [2018-11-18 11:43:33,058 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:43:33,062 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 11:43:33,062 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2018-11-18 11:43:33,062 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 11:43:33,066 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-18 11:43:33,066 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 11:43:33,066 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:43:33,092 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e6dac9a5-2206-475c-a1ac-8a5c556c2652/bin-2019/utaipan/witness.graphml [2018-11-18 11:43:33,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:43:33,093 INFO L168 Benchmark]: Toolchain (without parser) took 788.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 958.1 MB in the beginning and 1.1 GB in the end (delta: -110.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:33,094 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:43:33,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.15 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:33,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.92 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:43:33,095 INFO L168 Benchmark]: Boogie Preprocessor took 11.59 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:33,096 INFO L168 Benchmark]: RCFGBuilder took 144.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -159.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:33,096 INFO L168 Benchmark]: TraceAbstraction took 429.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 35.5 MB). Peak memory consumption was 35.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:43:33,097 INFO L168 Benchmark]: Witness Printer took 37.72 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:43:33,099 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.15 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.92 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.59 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 144.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -159.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 429.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 35.5 MB). Peak memory consumption was 35.5 MB. Max. memory is 11.5 GB. * Witness Printer took 37.72 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 16 locations, 1 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 3 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9 AbsIntWeakeningRatio, 0.5333333333333333 AbsIntAvgWeakeningVarsNumRemoved, 0.06666666666666667 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 285 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 3/7 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...