./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/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 59c5766d3cddc0d41e2678bb5221cccc60217431 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.23-5842f4b [2018-11-18 14:59:47,186 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 14:59:47,187 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 14:59:47,193 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 14:59:47,193 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 14:59:47,194 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 14:59:47,195 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 14:59:47,196 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 14:59:47,197 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 14:59:47,197 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 14:59:47,198 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 14:59:47,198 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 14:59:47,199 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 14:59:47,199 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 14:59:47,200 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 14:59:47,201 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 14:59:47,201 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 14:59:47,202 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 14:59:47,204 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 14:59:47,205 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 14:59:47,205 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 14:59:47,206 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 14:59:47,208 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 14:59:47,208 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 14:59:47,208 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 14:59:47,209 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 14:59:47,209 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 14:59:47,210 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 14:59:47,211 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 14:59:47,211 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 14:59:47,211 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 14:59:47,212 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 14:59:47,212 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 14:59:47,212 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 14:59:47,213 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 14:59:47,213 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 14:59:47,213 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 14:59:47,221 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 14:59:47,221 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 14:59:47,221 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 14:59:47,222 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 14:59:47,222 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 14:59:47,223 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 14:59:47,223 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 14:59:47,223 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 14:59:47,223 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 14:59:47,224 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 14:59:47,225 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 14:59:47,225 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 14:59:47,225 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 14:59:47,225 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 14:59:47,225 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 14:59:47,225 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 14:59:47,225 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 14:59:47,226 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 14:59:47,226 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 14:59:47,226 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 14:59:47,226 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 14:59:47,226 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 14:59:47,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 14:59:47,226 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 14:59:47,226 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_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/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 -> 59c5766d3cddc0d41e2678bb5221cccc60217431 [2018-11-18 14:59:47,252 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 14:59:47,261 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 14:59:47,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 14:59:47,265 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 14:59:47,265 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 14:59:47,266 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5_false-unreach-call_true-termination.c [2018-11-18 14:59:47,310 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/data/48c69b6e8/a6ee024350654336a8ac577ea8d16b00/FLAG8f83fe647 [2018-11-18 14:59:47,706 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 14:59:47,706 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/sv-benchmarks/c/recursive-simple/id2_i5_o5_false-unreach-call_true-termination.c [2018-11-18 14:59:47,711 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/data/48c69b6e8/a6ee024350654336a8ac577ea8d16b00/FLAG8f83fe647 [2018-11-18 14:59:47,720 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/data/48c69b6e8/a6ee024350654336a8ac577ea8d16b00 [2018-11-18 14:59:47,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 14:59:47,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 14:59:47,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 14:59:47,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 14:59:47,727 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 14:59:47,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e779c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47, skipping insertion in model container [2018-11-18 14:59:47,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 14:59:47,746 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 14:59:47,854 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:59:47,856 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 14:59:47,865 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:59:47,873 INFO L195 MainTranslator]: Completed translation [2018-11-18 14:59:47,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47 WrapperNode [2018-11-18 14:59:47,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 14:59:47,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 14:59:47,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 14:59:47,874 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 14:59:47,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 14:59:47,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 14:59:47,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 14:59:47,886 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 14:59:47,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... [2018-11-18 14:59:47,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 14:59:47,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 14:59:47,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 14:59:47,896 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 14:59:47,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 14:59:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 14:59:47,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 14:59:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-11-18 14:59:47,963 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-11-18 14:59:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 14:59:47,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 14:59:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 14:59:47,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 14:59:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 14:59:47,963 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 14:59:48,059 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 14:59:48,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:59:48 BoogieIcfgContainer [2018-11-18 14:59:48,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 14:59:48,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 14:59:48,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 14:59:48,062 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 14:59:48,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:59:47" (1/3) ... [2018-11-18 14:59:48,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f37b808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:59:48, skipping insertion in model container [2018-11-18 14:59:48,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:59:47" (2/3) ... [2018-11-18 14:59:48,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f37b808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:59:48, skipping insertion in model container [2018-11-18 14:59:48,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:59:48" (3/3) ... [2018-11-18 14:59:48,064 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_i5_o5_false-unreach-call_true-termination.c [2018-11-18 14:59:48,070 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 14:59:48,074 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 14:59:48,084 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 14:59:48,109 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 14:59:48,110 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 14:59:48,110 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 14:59:48,110 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 14:59:48,110 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 14:59:48,110 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 14:59:48,110 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 14:59:48,110 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 14:59:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-11-18 14:59:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 14:59:48,127 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:59:48,127 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:59:48,129 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:59:48,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2018-11-18 14:59:48,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:59:48,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:48,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:59:48,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:48,163 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:59:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:59:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:59:48,238 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:59:48,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 14:59:48,239 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:59:48,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 14:59:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 14:59:48,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 14:59:48,256 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2018-11-18 14:59:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:59:48,312 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 14:59:48,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 14:59:48,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 14:59:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:59:48,320 INFO L225 Difference]: With dead ends: 36 [2018-11-18 14:59:48,321 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 14:59:48,323 INFO L604 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 [2018-11-18 14:59:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 14:59:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 14:59:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 14:59:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-18 14:59:48,350 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2018-11-18 14:59:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:59:48,350 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-18 14:59:48,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 14:59:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-18 14:59:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 14:59:48,352 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:59:48,352 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:59:48,352 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:59:48,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2018-11-18 14:59:48,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:59:48,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:48,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:59:48,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:48,354 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:59:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:59:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:59:48,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:59:48,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 14:59:48,418 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:59:48,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 14:59:48,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 14:59:48,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 14:59:48,419 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2018-11-18 14:59:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:59:48,531 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-18 14:59:48,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 14:59:48,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-18 14:59:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:59:48,532 INFO L225 Difference]: With dead ends: 33 [2018-11-18 14:59:48,533 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 14:59:48,533 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 14:59:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 14:59:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-18 14:59:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 14:59:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-18 14:59:48,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2018-11-18 14:59:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:59:48,541 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-18 14:59:48,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 14:59:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-18 14:59:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 14:59:48,542 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:59:48,542 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:59:48,542 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:59:48,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2018-11-18 14:59:48,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:59:48,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:48,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:59:48,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:48,544 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:59:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:59:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 14:59:48,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:59:48,612 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:59:48,613 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-18 14:59:48,614 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [8], [12], [14], [17], [19], [25], [28], [29], [31], [32], [33], [34], [35], [36], [37], [39], [40], [41], [42] [2018-11-18 14:59:48,634 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 14:59:48,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 14:59:48,738 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 14:59:48,739 INFO L272 AbstractInterpreter]: Visited 22 different actions 66 times. Never merged. Widened at 2 different actions 4 times. Performed 141 root evaluator evaluations with a maximum evaluation depth of 3. Performed 141 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 14:59:48,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:48,752 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 14:59:48,788 INFO L227 lantSequenceWeakener]: Weakened 15 states. On average, predicates are now at 58.89% of their original sizes. [2018-11-18 14:59:48,788 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 14:59:48,911 INFO L415 sIntCurrentIteration]: We unified 24 AI predicates to 24 [2018-11-18 14:59:48,911 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 14:59:48,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 14:59:48,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [8] total 22 [2018-11-18 14:59:48,912 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 14:59:48,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 14:59:48,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 14:59:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-18 14:59:48,914 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 16 states. [2018-11-18 14:59:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:59:49,256 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-11-18 14:59:49,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 14:59:49,256 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2018-11-18 14:59:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:59:49,257 INFO L225 Difference]: With dead ends: 63 [2018-11-18 14:59:49,257 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 14:59:49,258 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2018-11-18 14:59:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 14:59:49,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2018-11-18 14:59:49,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 14:59:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-11-18 14:59:49,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2018-11-18 14:59:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:59:49,265 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-11-18 14:59:49,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 14:59:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-11-18 14:59:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 14:59:49,266 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:59:49,266 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:59:49,267 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:59:49,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2018-11-18 14:59:49,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:59:49,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:49,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:59:49,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:49,268 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:59:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:59:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 14:59:49,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:59:49,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:59:49,344 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-11-18 14:59:49,344 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [5], [7], [8], [12], [14], [17], [19], [25], [29], [31], [32], [33], [34], [35], [36], [37], [39], [40], [41], [42] [2018-11-18 14:59:49,345 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 14:59:49,345 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 14:59:49,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 14:59:49,389 INFO L272 AbstractInterpreter]: Visited 23 different actions 82 times. Merged at 8 different actions 19 times. Widened at 2 different actions 4 times. Performed 231 root evaluator evaluations with a maximum evaluation depth of 3. Performed 231 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 4 variables. [2018-11-18 14:59:49,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:49,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 14:59:49,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:59:49,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/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 [2018-11-18 14:59:49,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:59:49,399 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 14:59:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:59:49,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:59:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 14:59:49,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:59:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 14:59:49,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:59:49,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 23 [2018-11-18 14:59:49,883 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:59:49,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 14:59:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 14:59:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2018-11-18 14:59:49,884 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 18 states. [2018-11-18 14:59:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:59:50,002 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2018-11-18 14:59:50,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 14:59:50,005 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2018-11-18 14:59:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:59:50,005 INFO L225 Difference]: With dead ends: 67 [2018-11-18 14:59:50,006 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 14:59:50,006 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2018-11-18 14:59:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 14:59:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2018-11-18 14:59:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 14:59:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-11-18 14:59:50,011 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 31 [2018-11-18 14:59:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:59:50,011 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-11-18 14:59:50,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 14:59:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-11-18 14:59:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 14:59:50,012 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:59:50,012 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:59:50,012 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:59:50,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2018-11-18 14:59:50,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:59:50,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:50,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:59:50,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:50,013 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:59:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:59:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 14:59:50,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:59:50,061 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 14:59:50,061 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 14:59:50,061 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 14:59:50,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:59:50,062 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/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 [2018-11-18 14:59:50,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 14:59:50,070 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 14:59:50,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 14:59:50,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:59:50,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:59:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 14:59:50,191 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 14:59:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 14:59:50,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 14:59:50,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 21 [2018-11-18 14:59:50,561 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 14:59:50,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 14:59:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 14:59:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2018-11-18 14:59:50,562 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-11-18 14:59:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:59:50,719 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2018-11-18 14:59:50,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 14:59:50,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2018-11-18 14:59:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 14:59:50,720 INFO L225 Difference]: With dead ends: 72 [2018-11-18 14:59:50,720 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 14:59:50,721 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2018-11-18 14:59:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 14:59:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2018-11-18 14:59:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 14:59:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-11-18 14:59:50,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2018-11-18 14:59:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 14:59:50,727 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-11-18 14:59:50,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 14:59:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-11-18 14:59:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 14:59:50,728 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 14:59:50,728 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:59:50,728 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 14:59:50,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:59:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2018-11-18 14:59:50,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 14:59:50,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:50,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:59:50,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:59:50,729 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 14:59:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:59:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:59:50,758 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 14:59:50,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 02:59:50 BoogieIcfgContainer [2018-11-18 14:59:50,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 14:59:50,773 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 14:59:50,773 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 14:59:50,774 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 14:59:50,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:59:48" (3/4) ... [2018-11-18 14:59:50,775 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 14:59:50,804 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ba3f26dd-ab59-469e-90de-ce4b0f4d0980/bin-2019/utaipan/witness.graphml [2018-11-18 14:59:50,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 14:59:50,805 INFO L168 Benchmark]: Toolchain (without parser) took 3081.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 959.2 MB in the beginning and 873.0 MB in the end (delta: 86.3 MB). Peak memory consumption was 224.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:59:50,806 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:59:50,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:59:50,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:59:50,807 INFO L168 Benchmark]: Boogie Preprocessor took 10.18 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:59:50,807 INFO L168 Benchmark]: RCFGBuilder took 163.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 14:59:50,808 INFO L168 Benchmark]: TraceAbstraction took 2713.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 876.4 MB in the end (delta: 247.8 MB). Peak memory consumption was 247.8 MB. Max. memory is 11.5 GB. [2018-11-18 14:59:50,808 INFO L168 Benchmark]: Witness Printer took 31.07 ms. Allocated memory is still 1.2 GB. Free memory was 876.4 MB in the beginning and 873.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 14:59:50,810 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 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 was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2713.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 876.4 MB in the end (delta: 247.8 MB). Peak memory consumption was 247.8 MB. Max. memory is 11.5 GB. * Witness Printer took 31.07 ms. Allocated memory is still 1.2 GB. Free memory was 876.4 MB in the beginning and 873.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; VAL [input=5] [L19] CALL, EXPR id(input) VAL [\old(x)=5] [L8] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=4] [L13] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L14] CALL, EXPR id(x-1) VAL [\old(x)=3] [L8] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=2] [L13] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L14] CALL, EXPR id(x-1) VAL [\old(x)=1] [L8] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=0] [L13] COND TRUE x==0 [L13] RET return 0; VAL [\old(x)=0, \result=0, x=0] [L9] EXPR id2(x-1) VAL [\old(x)=1, id2(x-1)=0, x=1] [L9] RET return id2(x-1) + 1; [L14] EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L14] RET return id(x-1) + 1; [L9] EXPR id2(x-1) VAL [\old(x)=3, id2(x-1)=2, x=3] [L9] RET return id2(x-1) + 1; [L14] EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L14] RET return id(x-1) + 1; [L9] EXPR id2(x-1) VAL [\old(x)=5, id2(x-1)=4, x=5] [L9] RET return id2(x-1) + 1; [L19] EXPR id(input) VAL [id(input)=5, input=5] [L19] int result = id(input); [L20] COND TRUE result == 5 VAL [input=5, result=5] [L21] __VERIFIER_error() VAL [input=5, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. UNSAFE Result, 2.6s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 95 SDtfs, 72 SDslu, 822 SDs, 0 SdLazy, 361 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 216 GetRequests, 113 SyntacticMatches, 19 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.6805555555555557 AbsIntWeakeningRatio, 0.5833333333333334 AbsIntAvgWeakeningVarsNumRemoved, 0.9583333333333334 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 36 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 236 NumberOfCodeBlocks, 236 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 16656 SizeOfPredicates, 6 NumberOfNonLiveVariables, 162 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 44/94 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...