./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/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 e05793781d8e05fe8376a30b6751438f3b1a9d08 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 14:10:58,592 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 14:10:58,593 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 14:10:58,599 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 14:10:58,599 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 14:10:58,600 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 14:10:58,600 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 14:10:58,601 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 14:10:58,602 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 14:10:58,602 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 14:10:58,603 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 14:10:58,603 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 14:10:58,603 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 14:10:58,604 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 14:10:58,604 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 14:10:58,605 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 14:10:58,605 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 14:10:58,606 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 14:10:58,607 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 14:10:58,608 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 14:10:58,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 14:10:58,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 14:10:58,610 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 14:10:58,610 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 14:10:58,610 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 14:10:58,610 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 14:10:58,611 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 14:10:58,611 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 14:10:58,612 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 14:10:58,612 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 14:10:58,612 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 14:10:58,613 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 14:10:58,613 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 14:10:58,613 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 14:10:58,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 14:10:58,614 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 14:10:58,614 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 14:10:58,621 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 14:10:58,621 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 14:10:58,621 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 14:10:58,621 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 14:10:58,622 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 14:10:58,622 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 14:10:58,623 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 14:10:58,623 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 14:10:58,624 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 14:10:58,624 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 14:10:58,624 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 14:10:58,625 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 14:10:58,625 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 14:10:58,625 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 14:10:58,625 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_7ccc70b0-a7da-43f8-a94e-bcca39382f09/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 -> e05793781d8e05fe8376a30b6751438f3b1a9d08 [2018-12-09 14:10:58,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 14:10:58,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 14:10:58,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 14:10:58,651 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 14:10:58,651 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 14:10:58,652 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c [2018-12-09 14:10:58,690 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/data/92666450b/66da9e88ef944b998a15f1bda8b3d1e2/FLAG420a20b09 [2018-12-09 14:10:59,105 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 14:10:59,106 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c [2018-12-09 14:10:59,109 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/data/92666450b/66da9e88ef944b998a15f1bda8b3d1e2/FLAG420a20b09 [2018-12-09 14:10:59,117 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/data/92666450b/66da9e88ef944b998a15f1bda8b3d1e2 [2018-12-09 14:10:59,118 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 14:10:59,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 14:10:59,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 14:10:59,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 14:10:59,122 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 14:10:59,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,124 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 09.12 02:10:59, skipping insertion in model container [2018-12-09 14:10:59,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 14:10:59,136 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 14:10:59,215 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 14:10:59,217 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 14:10:59,225 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 14:10:59,232 INFO L195 MainTranslator]: Completed translation [2018-12-09 14:10:59,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59 WrapperNode [2018-12-09 14:10:59,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 14:10:59,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 14:10:59,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 14:10:59,233 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 14:10:59,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 14:10:59,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 14:10:59,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 14:10:59,244 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 14:10:59,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... [2018-12-09 14:10:59,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 14:10:59,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 14:10:59,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 14:10:59,255 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 14:10:59,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/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 [2018-12-09 14:10:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 14:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 14:10:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 14:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 14:10:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 14:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 14:10:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-09 14:10:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-09 14:10:59,390 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 14:10:59,390 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 14:10:59,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:59 BoogieIcfgContainer [2018-12-09 14:10:59,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 14:10:59,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 14:10:59,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 14:10:59,393 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 14:10:59,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:10:59" (1/3) ... [2018-12-09 14:10:59,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:10:59, skipping insertion in model container [2018-12-09 14:10:59,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:59" (2/3) ... [2018-12-09 14:10:59,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:10:59, skipping insertion in model container [2018-12-09 14:10:59,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:59" (3/3) ... [2018-12-09 14:10:59,395 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i5_o5_true-unreach-call_true-termination.c [2018-12-09 14:10:59,401 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 14:10:59,405 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 14:10:59,414 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 14:10:59,432 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 14:10:59,433 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 14:10:59,433 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 14:10:59,433 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 14:10:59,433 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 14:10:59,433 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 14:10:59,433 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 14:10:59,433 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 14:10:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-09 14:10:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 14:10:59,447 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:10:59,447 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:10:59,449 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:10:59,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:10:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-09 14:10:59,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:10:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:10:59,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:10:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:10:59,482 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:10:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:10:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 14:10:59,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 14:10:59,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 14:10:59,552 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:10:59,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 14:10:59,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 14:10:59,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 14:10:59,565 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-09 14:10:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:10:59,614 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-09 14:10:59,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 14:10:59,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 14:10:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:10:59,621 INFO L225 Difference]: With dead ends: 30 [2018-12-09 14:10:59,621 INFO L226 Difference]: Without dead ends: 18 [2018-12-09 14:10:59,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 14:10:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-09 14:10:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-09 14:10:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 14:10:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-09 14:10:59,648 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-09 14:10:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:10:59,648 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-09 14:10:59,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 14:10:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-09 14:10:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 14:10:59,649 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:10:59,649 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:10:59,650 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:10:59,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:10:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-09 14:10:59,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:10:59,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:10:59,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:10:59,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:10:59,651 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:10:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:10:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-09 14:10:59,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:10:59,681 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:10:59,682 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-09 14:10:59,683 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-12-09 14:10:59,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 14:10:59,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 14:10:59,791 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 14:10:59,792 INFO L272 AbstractInterpreter]: Visited 16 different actions 49 times. Never merged. Widened at 1 different actions 2 times. Performed 105 root evaluator evaluations with a maximum evaluation depth of 3. Performed 105 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-12-09 14:10:59,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:10:59,797 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 14:10:59,825 INFO L227 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 58.33% of their original sizes. [2018-12-09 14:10:59,825 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 14:10:59,897 INFO L418 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2018-12-09 14:10:59,897 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 14:10:59,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 14:10:59,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2018-12-09 14:10:59,897 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:10:59,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 14:10:59,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 14:10:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-09 14:10:59,899 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2018-12-09 14:11:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:11:00,085 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-12-09 14:11:00,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 14:11:00,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2018-12-09 14:11:00,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:11:00,085 INFO L225 Difference]: With dead ends: 39 [2018-12-09 14:11:00,085 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 14:11:00,086 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-12-09 14:11:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 14:11:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-12-09 14:11:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 14:11:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-12-09 14:11:00,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2018-12-09 14:11:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:11:00,090 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-12-09 14:11:00,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 14:11:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-12-09 14:11:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 14:11:00,091 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:11:00,091 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:11:00,091 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:11:00,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:11:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-09 14:11:00,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:11:00,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:00,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:11:00,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:00,092 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:11:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:11:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 14:11:00,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:00,122 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:11:00,122 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:11:00,123 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:11:00,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:00,123 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/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 [2018-12-09 14:11:00,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:11:00,130 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:11:00,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 14:11:00,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:11:00,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:11:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 14:11:00,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:11:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 14:11:00,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:11:00,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-12-09 14:11:00,350 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:11:00,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 14:11:00,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 14:11:00,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-09 14:11:00,351 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2018-12-09 14:11:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:11:00,385 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-12-09 14:11:00,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 14:11:00,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-09 14:11:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:11:00,386 INFO L225 Difference]: With dead ends: 49 [2018-12-09 14:11:00,386 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 14:11:00,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-09 14:11:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 14:11:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-12-09 14:11:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 14:11:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-09 14:11:00,390 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2018-12-09 14:11:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:11:00,390 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-09 14:11:00,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 14:11:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-09 14:11:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 14:11:00,391 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:11:00,391 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:11:00,391 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:11:00,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:11:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-09 14:11:00,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:11:00,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:00,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:11:00,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:00,392 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:11:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:11:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 14:11:00,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:00,436 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:11:00,437 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:11:00,437 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:11:00,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:00,437 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/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 [2018-12-09 14:11:00,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 14:11:00,444 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 14:11:00,450 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 14:11:00,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:11:00,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:11:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 14:11:00,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:11:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 14:11:00,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:11:00,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-12-09 14:11:00,721 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:11:00,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 14:11:00,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 14:11:00,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-09 14:11:00,721 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2018-12-09 14:11:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:11:00,759 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2018-12-09 14:11:00,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 14:11:00,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-12-09 14:11:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:11:00,760 INFO L225 Difference]: With dead ends: 52 [2018-12-09 14:11:00,760 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 14:11:00,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-12-09 14:11:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 14:11:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2018-12-09 14:11:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 14:11:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-09 14:11:00,764 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2018-12-09 14:11:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:11:00,765 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-09 14:11:00,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 14:11:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-09 14:11:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 14:11:00,765 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:11:00,765 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:11:00,766 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:11:00,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:11:00,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-12-09 14:11:00,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:11:00,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:00,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:11:00,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:00,767 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:11:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:11:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-09 14:11:00,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:00,811 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:11:00,811 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:11:00,811 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:11:00,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:00,812 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:11:00,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:11:00,820 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 14:11:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:11:00,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:11:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-09 14:11:00,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:11:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 14:11:01,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:11:01,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 14 [2018-12-09 14:11:01,259 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:11:01,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 14:11:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 14:11:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-12-09 14:11:01,259 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 9 states. [2018-12-09 14:11:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:11:01,309 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-12-09 14:11:01,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 14:11:01,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-09 14:11:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:11:01,310 INFO L225 Difference]: With dead ends: 55 [2018-12-09 14:11:01,310 INFO L226 Difference]: Without dead ends: 45 [2018-12-09 14:11:01,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-12-09 14:11:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-09 14:11:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-12-09 14:11:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 14:11:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-09 14:11:01,314 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 37 [2018-12-09 14:11:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:11:01,314 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-09 14:11:01,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 14:11:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-09 14:11:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 14:11:01,315 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:11:01,315 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:11:01,315 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:11:01,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:11:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-12-09 14:11:01,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:11:01,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:01,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 14:11:01,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:01,317 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:11:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:11:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 14:11:01,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:01,446 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 14:11:01,447 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 14:11:01,447 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 14:11:01,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 14:11:01,447 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 14:11:01,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 14:11:01,458 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 14:11:01,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 14:11:01,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 14:11:01,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 14:11:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 14:11:01,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 14:11:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-09 14:11:01,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 14:11:01,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2018-12-09 14:11:01,670 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 14:11:01,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-09 14:11:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-09 14:11:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-12-09 14:11:01,671 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2018-12-09 14:11:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:11:01,721 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2018-12-09 14:11:01,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 14:11:01,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-12-09 14:11:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:11:01,722 INFO L225 Difference]: With dead ends: 58 [2018-12-09 14:11:01,722 INFO L226 Difference]: Without dead ends: 48 [2018-12-09 14:11:01,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-12-09 14:11:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-09 14:11:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2018-12-09 14:11:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 14:11:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-09 14:11:01,726 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 43 [2018-12-09 14:11:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:11:01,726 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-09 14:11:01,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-09 14:11:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-09 14:11:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-09 14:11:01,727 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 14:11:01,727 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 14:11:01,727 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 14:11:01,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 14:11:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-12-09 14:11:01,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 14:11:01,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:01,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 14:11:01,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 14:11:01,728 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 14:11:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 14:11:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-09 14:11:01,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 14:11:01,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-12-09 14:11:01,791 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 14:11:01,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 14:11:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 14:11:01,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-09 14:11:01,791 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-12-09 14:11:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 14:11:01,841 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-12-09 14:11:01,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 14:11:01,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-09 14:11:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 14:11:01,841 INFO L225 Difference]: With dead ends: 48 [2018-12-09 14:11:01,841 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 14:11:01,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-09 14:11:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 14:11:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 14:11:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 14:11:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 14:11:01,842 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2018-12-09 14:11:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 14:11:01,842 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 14:11:01,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 14:11:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 14:11:01,842 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 14:11:01,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 14:11:01,871 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 14:11:01,871 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (= main_~input~0 5) [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-12-09 14:11:01,871 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-12-09 14:11:01,872 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-12-09 14:11:01,872 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-12-09 14:11:01,872 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-09 14:11:01,872 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-09 14:11:01,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:11:01 BoogieIcfgContainer [2018-12-09 14:11:01,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 14:11:01,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 14:11:01,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 14:11:01,873 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 14:11:01,874 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:59" (3/4) ... [2018-12-09 14:11:01,876 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 14:11:01,879 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 14:11:01,879 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 14:11:01,879 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-09 14:11:01,881 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 14:11:01,881 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 14:11:01,882 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 14:11:01,902 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7ccc70b0-a7da-43f8-a94e-bcca39382f09/bin-2019/utaipan/witness.graphml [2018-12-09 14:11:01,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 14:11:01,903 INFO L168 Benchmark]: Toolchain (without parser) took 2784.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 216.5 MB). Free memory was 956.7 MB in the beginning and 950.7 MB in the end (delta: 6.0 MB). Peak memory consumption was 222.5 MB. Max. memory is 11.5 GB. [2018-12-09 14:11:01,904 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 14:11:01,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 112.89 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 946.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 14:11:01,904 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.19 ms. Allocated memory is still 1.0 GB. Free memory is still 946.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 14:11:01,904 INFO L168 Benchmark]: Boogie Preprocessor took 10.18 ms. Allocated memory is still 1.0 GB. Free memory is still 946.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 14:11:01,904 INFO L168 Benchmark]: RCFGBuilder took 135.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -166.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 14:11:01,905 INFO L168 Benchmark]: TraceAbstraction took 2482.48 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 83.4 MB). Free memory was 1.1 GB in the beginning and 958.8 MB in the end (delta: 154.1 MB). Peak memory consumption was 237.4 MB. Max. memory is 11.5 GB. [2018-12-09 14:11:01,905 INFO L168 Benchmark]: Witness Printer took 29.03 ms. Allocated memory is still 1.2 GB. Free memory was 958.8 MB in the beginning and 950.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-12-09 14:11:01,906 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 112.89 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 946.0 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 11.19 ms. Allocated memory is still 1.0 GB. Free memory is still 946.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.18 ms. Allocated memory is still 1.0 GB. Free memory is still 946.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 135.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -166.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2482.48 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 83.4 MB). Free memory was 1.1 GB in the beginning and 958.8 MB in the end (delta: 154.1 MB). Peak memory consumption was 237.4 MB. Max. memory is 11.5 GB. * Witness Printer took 29.03 ms. Allocated memory is still 1.2 GB. Free memory was 958.8 MB in the beginning and 950.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 20 locations, 1 error locations. SAFE Result, 2.4s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 121 SDtfs, 69 SDslu, 677 SDs, 0 SdLazy, 291 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 378 GetRequests, 260 SyntacticMatches, 29 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.6944444444444444 AbsIntWeakeningRatio, 0.5555555555555556 AbsIntAvgWeakeningVarsNumRemoved, 0.8333333333333334 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 15 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 43 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 353 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 474 ConstructedInterpolants, 0 QuantifiedInterpolants, 47664 SizeOfPredicates, 16 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 351/646 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...