./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.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_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/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 9b6c190b845f4496788acb9553cb85e1e7dace14 ................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2018-12-03 05:33:08,741 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 05:33:08,742 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 05:33:08,748 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 05:33:08,748 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 05:33:08,748 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 05:33:08,749 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 05:33:08,750 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 05:33:08,750 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 05:33:08,751 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 05:33:08,751 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 05:33:08,751 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 05:33:08,752 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 05:33:08,752 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 05:33:08,753 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 05:33:08,753 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 05:33:08,754 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 05:33:08,755 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 05:33:08,755 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 05:33:08,756 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 05:33:08,757 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 05:33:08,757 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 05:33:08,758 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 05:33:08,758 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 05:33:08,759 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 05:33:08,759 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 05:33:08,759 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 05:33:08,760 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 05:33:08,760 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 05:33:08,761 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 05:33:08,761 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 05:33:08,761 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 05:33:08,761 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 05:33:08,761 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 05:33:08,762 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 05:33:08,762 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 05:33:08,762 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 05:33:08,769 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 05:33:08,769 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 05:33:08,770 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 05:33:08,770 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 05:33:08,770 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 05:33:08,770 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 05:33:08,770 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 05:33:08,771 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 05:33:08,771 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 05:33:08,771 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 05:33:08,771 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 05:33:08,771 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 05:33:08,771 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 05:33:08,772 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 05:33:08,772 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 05:33:08,773 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 05:33:08,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 05:33:08,774 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 05:33:08,774 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 05:33:08,774 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 05:33:08,774 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 05:33:08,774 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 05:33:08,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 05:33:08,774 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 05:33:08,774 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_23ba096a-b47c-4f2f-b59e-c4f86f91382f/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 -> 9b6c190b845f4496788acb9553cb85e1e7dace14 [2018-12-03 05:33:08,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 05:33:08,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 05:33:08,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 05:33:08,800 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 05:33:08,800 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 05:33:08,801 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 05:33:08,836 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/data/9a3988691/d50370e82bd84a5fafcb216e4eb8ebf0/FLAGa89b1505a [2018-12-03 05:33:09,275 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 05:33:09,275 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/sv-benchmarks/c/recursive-simple/id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 05:33:09,279 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/data/9a3988691/d50370e82bd84a5fafcb216e4eb8ebf0/FLAGa89b1505a [2018-12-03 05:33:09,286 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/data/9a3988691/d50370e82bd84a5fafcb216e4eb8ebf0 [2018-12-03 05:33:09,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 05:33:09,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 05:33:09,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 05:33:09,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 05:33:09,291 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 05:33:09,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf44b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09, skipping insertion in model container [2018-12-03 05:33:09,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 05:33:09,305 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 05:33:09,385 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 05:33:09,387 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 05:33:09,395 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 05:33:09,402 INFO L195 MainTranslator]: Completed translation [2018-12-03 05:33:09,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09 WrapperNode [2018-12-03 05:33:09,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 05:33:09,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 05:33:09,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 05:33:09,403 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 05:33:09,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 05:33:09,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 05:33:09,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 05:33:09,415 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 05:33:09,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... [2018-12-03 05:33:09,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 05:33:09,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 05:33:09,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 05:33:09,425 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 05:33:09,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/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 [2018-12-03 05:33:09,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 05:33:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 05:33:09,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 05:33:09,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 05:33:09,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 05:33:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 05:33:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-03 05:33:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-03 05:33:09,556 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 05:33:09,556 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 05:33:09,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:33:09 BoogieIcfgContainer [2018-12-03 05:33:09,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 05:33:09,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 05:33:09,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 05:33:09,559 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 05:33:09,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 05:33:09" (1/3) ... [2018-12-03 05:33:09,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fe013d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:33:09, skipping insertion in model container [2018-12-03 05:33:09,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:33:09" (2/3) ... [2018-12-03 05:33:09,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fe013d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:33:09, skipping insertion in model container [2018-12-03 05:33:09,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:33:09" (3/3) ... [2018-12-03 05:33:09,561 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o3_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 05:33:09,566 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 05:33:09,570 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 05:33:09,580 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 05:33:09,597 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 05:33:09,598 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 05:33:09,598 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 05:33:09,598 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 05:33:09,598 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 05:33:09,598 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 05:33:09,598 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 05:33:09,598 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 05:33:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-03 05:33:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 05:33:09,612 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:33:09,612 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:33:09,613 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 05:33:09,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:33:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-03 05:33:09,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:33:09,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:09,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:33:09,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:09,646 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:33:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:33:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 05:33:09,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 05:33:09,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 05:33:09,747 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 05:33:09,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 05:33:09,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 05:33:09,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 05:33:09,759 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-03 05:33:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:33:09,782 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-12-03 05:33:09,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 05:33:09,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 05:33:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:33:09,789 INFO L225 Difference]: With dead ends: 32 [2018-12-03 05:33:09,789 INFO L226 Difference]: Without dead ends: 18 [2018-12-03 05:33:09,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 05:33:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-03 05:33:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-03 05:33:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-03 05:33:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-03 05:33:09,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-03 05:33:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:33:09,814 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-03 05:33:09,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 05:33:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-03 05:33:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-03 05:33:09,815 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:33:09,815 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:33:09,815 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 05:33:09,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:33:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-03 05:33:09,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:33:09,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:09,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:33:09,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:09,816 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:33:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:33:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 05:33:09,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:33:09,887 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 05:33:09,888 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-03 05:33:09,889 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-12-03 05:33:09,908 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 05:33:09,908 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 05:33:10,004 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 05:33:10,006 INFO L272 AbstractInterpreter]: Visited 17 different actions 57 times. Merged at 5 different actions 21 times. Never widened. Performed 80 root evaluator evaluations with a maximum evaluation depth of 3. Performed 80 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 4 variables. [2018-12-03 05:33:10,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:33:10,011 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 05:33:10,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:33:10,011 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/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 [2018-12-03 05:33:10,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:33:10,021 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 05:33:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:33:10,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 05:33:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 05:33:10,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 05:33:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 05:33:10,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 05:33:10,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-03 05:33:10,167 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 05:33:10,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 05:33:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 05:33:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-03 05:33:10,168 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-12-03 05:33:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:33:10,183 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-03 05:33:10,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 05:33:10,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-12-03 05:33:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:33:10,184 INFO L225 Difference]: With dead ends: 25 [2018-12-03 05:33:10,184 INFO L226 Difference]: Without dead ends: 21 [2018-12-03 05:33:10,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-12-03 05:33:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-03 05:33:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-03 05:33:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-03 05:33:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-03 05:33:10,188 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-03 05:33:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:33:10,188 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-03 05:33:10,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 05:33:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-03 05:33:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-03 05:33:10,189 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:33:10,189 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:33:10,189 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 05:33:10,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:33:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-03 05:33:10,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:33:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:10,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 05:33:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:10,190 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:33:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 05:33:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-03 05:33:10,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:33:10,266 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 05:33:10,266 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 05:33:10,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 05:33:10,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 05:33:10,266 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 05:33:10,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 05:33:10,274 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 05:33:10,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 05:33:10,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 05:33:10,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 05:33:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-03 05:33:10,310 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 05:33:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-03 05:33:10,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 05:33:10,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2018-12-03 05:33:10,446 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 05:33:10,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 05:33:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 05:33:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 05:33:10,447 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-12-03 05:33:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 05:33:10,467 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-03 05:33:10,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 05:33:10,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-12-03 05:33:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 05:33:10,468 INFO L225 Difference]: With dead ends: 28 [2018-12-03 05:33:10,468 INFO L226 Difference]: Without dead ends: 24 [2018-12-03 05:33:10,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-12-03 05:33:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-03 05:33:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-03 05:33:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 05:33:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-03 05:33:10,471 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-03 05:33:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 05:33:10,472 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-03 05:33:10,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 05:33:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-03 05:33:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-03 05:33:10,472 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 05:33:10,472 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 05:33:10,472 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 05:33:10,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 05:33:10,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-03 05:33:10,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 05:33:10,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:10,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 05:33:10,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 05:33:10,474 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 05:33:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 05:33:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 05:33:10,507 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 05:33:10,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:33:10 BoogieIcfgContainer [2018-12-03 05:33:10,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 05:33:10,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 05:33:10,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 05:33:10,523 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 05:33:10,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:33:09" (3/4) ... [2018-12-03 05:33:10,525 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-03 05:33:10,549 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_23ba096a-b47c-4f2f-b59e-c4f86f91382f/bin-2019/utaipan/witness.graphml [2018-12-03 05:33:10,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 05:33:10,550 INFO L168 Benchmark]: Toolchain (without parser) took 1261.36 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.3 MB). Free memory was 951.3 MB in the beginning and 898.0 MB in the end (delta: 53.3 MB). Peak memory consumption was 123.6 MB. Max. memory is 11.5 GB. [2018-12-03 05:33:10,551 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 05:33:10,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 113.50 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 05:33:10,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.32 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 05:33:10,551 INFO L168 Benchmark]: Boogie Preprocessor took 9.97 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 05:33:10,551 INFO L168 Benchmark]: RCFGBuilder took 131.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.3 MB). Free memory was 940.5 MB in the beginning and 1.0 GB in the end (delta: -107.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-03 05:33:10,552 INFO L168 Benchmark]: TraceAbstraction took 966.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 905.4 MB in the end (delta: 142.7 MB). Peak memory consumption was 142.7 MB. Max. memory is 11.5 GB. [2018-12-03 05:33:10,552 INFO L168 Benchmark]: Witness Printer took 26.25 ms. Allocated memory is still 1.1 GB. Free memory was 905.4 MB in the beginning and 898.0 MB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. [2018-12-03 05:33:10,554 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 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 113.50 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.5 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 11.32 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.97 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 131.79 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.3 MB). Free memory was 940.5 MB in the beginning and 1.0 GB in the end (delta: -107.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 966.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 905.4 MB in the end (delta: 142.7 MB). Peak memory consumption was 142.7 MB. Max. memory is 11.5 GB. * Witness Printer took 26.25 ms. Allocated memory is still 1.1 GB. Free memory was 905.4 MB in the beginning and 898.0 MB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=3, input=3] [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 VAL [input=3, result=3] [L13] __VERIFIER_error() VAL [input=3, result=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 0.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 2 SDslu, 270 SDs, 0 SdLazy, 58 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 9966 SizeOfPredicates, 2 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 27/54 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...