./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/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 dd82318ec795f8c5ba1d6bd1e94de4995b910941 ................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/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 dd82318ec795f8c5ba1d6bd1e94de4995b910941 ................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:29:23,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:29:23,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:29:23,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:29:23,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:29:23,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:29:23,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:29:23,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:29:23,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:29:23,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:29:23,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:29:23,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:29:23,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:29:23,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:29:23,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:29:23,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:29:23,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:29:23,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:29:23,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:29:23,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:29:23,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:29:23,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:29:23,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:29:23,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:29:23,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:29:23,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:29:23,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:29:23,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:29:23,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:29:23,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:29:23,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:29:23,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:29:23,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:29:23,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:29:23,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:29:23,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:29:23,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:29:23,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:29:23,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:29:23,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:29:23,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:29:23,708 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:29:23,727 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:29:23,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:29:23,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:29:23,729 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:29:23,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:29:23,729 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:29:23,729 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:29:23,729 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:29:23,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:29:23,730 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:29:23,731 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:29:23,731 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:29:23,731 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:29:23,731 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:29:23,731 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:29:23,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:29:23,732 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:29:23,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:29:23,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:29:23,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:29:23,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:29:23,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:29:23,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:29:23,733 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:29:23,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:29:23,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:29:23,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:29:23,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:29:23,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:29:23,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:29:23,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:29:23,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:29:23,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:29:23,735 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:29:23,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:29:23,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:29:23,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:29:23,736 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-11-26 02:29:23,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:29:23,903 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:29:23,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:29:23,907 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:29:23,907 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:29:23,908 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/../../sv-benchmarks/c/recursive/Ackermann02.c [2019-11-26 02:29:23,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/a3e8ee6f0/b22ce9c5a2794a3ba11d97ed57487e4c/FLAGf7d7c4573 [2019-11-26 02:29:24,368 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:29:24,369 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/sv-benchmarks/c/recursive/Ackermann02.c [2019-11-26 02:29:24,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/a3e8ee6f0/b22ce9c5a2794a3ba11d97ed57487e4c/FLAGf7d7c4573 [2019-11-26 02:29:24,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/a3e8ee6f0/b22ce9c5a2794a3ba11d97ed57487e4c [2019-11-26 02:29:24,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:29:24,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:29:24,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:29:24,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:29:24,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:29:24,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d24004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24, skipping insertion in model container [2019-11-26 02:29:24,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:29:24,434 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:29:24,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:29:24,593 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:29:24,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:29:24,677 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:29:24,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24 WrapperNode [2019-11-26 02:29:24,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:29:24,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:29:24,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:29:24,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:29:24,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:29:24,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:29:24,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:29:24,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:29:24,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... [2019-11-26 02:29:24,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:29:24,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:29:24,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:29:24,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:29:24,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:29:24,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:29:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:29:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-26 02:29:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-26 02:29:25,060 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:29:25,060 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:29:25,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:25 BoogieIcfgContainer [2019-11-26 02:29:25,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:29:25,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:29:25,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:29:25,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:29:25,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:29:24" (1/3) ... [2019-11-26 02:29:25,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219d158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:29:25, skipping insertion in model container [2019-11-26 02:29:25,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:24" (2/3) ... [2019-11-26 02:29:25,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219d158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:29:25, skipping insertion in model container [2019-11-26 02:29:25,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:25" (3/3) ... [2019-11-26 02:29:25,073 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-11-26 02:29:25,081 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:29:25,088 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:29:25,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:29:25,130 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:29:25,130 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:29:25,130 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:29:25,130 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:29:25,131 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:29:25,131 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:29:25,131 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:29:25,131 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:29:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-26 02:29:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:29:25,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:25,159 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:25,159 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-26 02:29:25,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:25,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945490775] [2019-11-26 02:29:25,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:25,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945490775] [2019-11-26 02:29:25,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:29:25,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:29:25,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419079650] [2019-11-26 02:29:25,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:29:25,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:25,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:29:25,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:29:25,363 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-11-26 02:29:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:25,494 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-11-26 02:29:25,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:29:25,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-26 02:29:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:25,505 INFO L225 Difference]: With dead ends: 47 [2019-11-26 02:29:25,505 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 02:29:25,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:29:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 02:29:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-26 02:29:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-26 02:29:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-26 02:29:25,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-26 02:29:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:25,549 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-26 02:29:25,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:29:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-26 02:29:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-26 02:29:25,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:25,552 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:25,552 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-26 02:29:25,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:25,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872416062] [2019-11-26 02:29:25,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:29:25,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872416062] [2019-11-26 02:29:25,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052841677] [2019-11-26 02:29:25,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:25,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:29:25,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-26 02:29:25,767 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:25,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:29:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:29:26,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866087537] [2019-11-26 02:29:26,029 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-26 02:29:26,029 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:29:26,034 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:29:26,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:26,242 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-26 02:29:26,246 INFO L168 Benchmark]: Toolchain (without parser) took 1849.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -103.0 MB). Peak memory consumption was 37.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:26,246 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:26,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:26,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:26,248 INFO L168 Benchmark]: Boogie Preprocessor took 16.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:26,248 INFO L168 Benchmark]: RCFGBuilder took 337.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:26,249 INFO L168 Benchmark]: TraceAbstraction took 1181.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 68.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:26,252 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 279.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 337.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1181.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 68.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:29:28,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:29:28,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:29:28,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:29:28,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:29:28,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:29:28,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:29:28,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:29:28,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:29:28,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:29:28,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:29:28,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:29:28,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:29:28,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:29:28,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:29:28,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:29:28,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:29:28,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:29:28,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:29:28,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:29:28,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:29:28,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:29:28,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:29:28,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:29:28,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:29:28,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:29:28,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:29:28,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:29:28,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:29:28,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:29:28,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:29:28,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:29:28,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:29:28,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:29:28,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:29:28,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:29:28,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:29:28,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:29:28,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:29:28,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:29:28,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:29:28,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:29:28,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:29:28,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:29:28,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:29:28,098 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:29:28,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:29:28,098 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:29:28,098 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:29:28,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:29:28,099 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:29:28,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:29:28,100 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:29:28,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:29:28,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:29:28,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:29:28,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:29:28,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:29:28,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:29:28,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:29:28,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:29:28,102 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:29:28,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:29:28,103 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:29:28,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:29:28,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:29:28,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:29:28,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:29:28,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:29:28,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:29:28,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:29:28,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:29:28,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:29:28,105 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:29:28,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:29:28,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:29:28,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:29:28,106 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-11-26 02:29:28,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:29:28,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:29:28,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:29:28,412 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:29:28,414 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:29:28,415 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/../../sv-benchmarks/c/recursive/Ackermann02.c [2019-11-26 02:29:28,467 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/2ac074340/693c2cc058bb41e19eb7b133591c0aeb/FLAG46476b7dd [2019-11-26 02:29:28,834 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:29:28,834 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/sv-benchmarks/c/recursive/Ackermann02.c [2019-11-26 02:29:28,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/2ac074340/693c2cc058bb41e19eb7b133591c0aeb/FLAG46476b7dd [2019-11-26 02:29:29,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/data/2ac074340/693c2cc058bb41e19eb7b133591c0aeb [2019-11-26 02:29:29,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:29:29,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:29:29,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:29:29,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:29:29,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:29:29,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dec60be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29, skipping insertion in model container [2019-11-26 02:29:29,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:29:29,224 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:29:29,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:29:29,413 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:29:29,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:29:29,444 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:29:29,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29 WrapperNode [2019-11-26 02:29:29,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:29:29,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:29:29,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:29:29,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:29:29,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:29:29,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:29:29,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:29:29,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:29:29,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... [2019-11-26 02:29:29,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:29:29,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:29:29,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:29:29,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:29:29,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:29:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:29:29,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:29:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-26 02:29:29,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-26 02:29:29,948 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:29:29,949 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:29:29,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:29 BoogieIcfgContainer [2019-11-26 02:29:29,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:29:29,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:29:29,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:29:29,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:29:29,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:29:29" (1/3) ... [2019-11-26 02:29:29,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfefeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:29:29, skipping insertion in model container [2019-11-26 02:29:29,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:29" (2/3) ... [2019-11-26 02:29:29,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfefeec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:29:29, skipping insertion in model container [2019-11-26 02:29:29,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:29" (3/3) ... [2019-11-26 02:29:29,961 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-11-26 02:29:29,970 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:29:29,976 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:29:29,986 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:29:30,013 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:29:30,013 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:29:30,014 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:29:30,014 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:29:30,014 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:29:30,014 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:29:30,014 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:29:30,015 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:29:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-26 02:29:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:29:30,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:30,038 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:30,039 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:30,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1290447975, now seen corresponding path program 1 times [2019-11-26 02:29:30,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:29:30,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1207871115] [2019-11-26 02:29:30,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:29:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:30,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:29:30,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:30,261 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:30,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207871115] [2019-11-26 02:29:30,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:29:30,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-11-26 02:29:30,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586924790] [2019-11-26 02:29:30,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:29:30,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:29:30,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:29:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:29:30,391 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-11-26 02:29:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:30,833 INFO L93 Difference]: Finished difference Result 65 states and 101 transitions. [2019-11-26 02:29:30,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:29:30,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2019-11-26 02:29:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:30,859 INFO L225 Difference]: With dead ends: 65 [2019-11-26 02:29:30,859 INFO L226 Difference]: Without dead ends: 32 [2019-11-26 02:29:30,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:29:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-26 02:29:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-26 02:29:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:29:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 50 transitions. [2019-11-26 02:29:30,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 50 transitions. Word has length 11 [2019-11-26 02:29:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:30,924 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 50 transitions. [2019-11-26 02:29:30,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:29:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 50 transitions. [2019-11-26 02:29:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-26 02:29:30,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:30,927 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:31,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:29:31,129 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:31,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1161569483, now seen corresponding path program 1 times [2019-11-26 02:29:31,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:29:31,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1612746463] [2019-11-26 02:29:31,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:29:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:31,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:29:31,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:29:31,198 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:29:31,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1612746463] [2019-11-26 02:29:31,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518906603] [2019-11-26 02:29:31,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:31,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:29:31,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:29:31,355 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:29:31,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:29:31,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-11-26 02:29:31,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029631095] [2019-11-26 02:29:31,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:29:31,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:29:31,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:29:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:29:31,424 INFO L87 Difference]: Start difference. First operand 32 states and 50 transitions. Second operand 6 states. [2019-11-26 02:29:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:31,532 INFO L93 Difference]: Finished difference Result 64 states and 128 transitions. [2019-11-26 02:29:31,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:29:31,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-26 02:29:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:31,537 INFO L225 Difference]: With dead ends: 64 [2019-11-26 02:29:31,539 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:29:31,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:29:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:29:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-26 02:29:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-26 02:29:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 61 transitions. [2019-11-26 02:29:31,571 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 61 transitions. Word has length 25 [2019-11-26 02:29:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:31,572 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 61 transitions. [2019-11-26 02:29:31,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:29:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 61 transitions. [2019-11-26 02:29:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-26 02:29:31,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:31,583 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:31,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:31,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:31,986 INFO L82 PathProgramCache]: Analyzing trace with hash -622900335, now seen corresponding path program 1 times [2019-11-26 02:29:31,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:29:31,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [139392478] [2019-11-26 02:29:31,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:29:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:29:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:29:32,134 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:29:32,135 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:29:32,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:29:32,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:29:32 BoogieIcfgContainer [2019-11-26 02:29:32,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:29:32,363 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:29:32,363 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:29:32,363 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:29:32,364 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:29" (3/4) ... [2019-11-26 02:29:32,365 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:29:32,413 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ab049666-76d2-498c-8cd1-cc9e4a2cdd6c/bin/utaipan/witness.graphml [2019-11-26 02:29:32,414 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:29:32,416 INFO L168 Benchmark]: Toolchain (without parser) took 3223.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 961.8 MB in the beginning and 966.4 MB in the end (delta: -4.7 MB). Peak memory consumption was 120.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:32,416 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:32,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.22 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:32,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.64 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:32,419 INFO L168 Benchmark]: Boogie Preprocessor took 80.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:32,422 INFO L168 Benchmark]: RCFGBuilder took 390.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:32,423 INFO L168 Benchmark]: TraceAbstraction took 2409.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 966.4 MB in the end (delta: 134.7 MB). Peak memory consumption was 134.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:32,423 INFO L168 Benchmark]: Witness Printer took 50.85 ms. Allocated memory is still 1.2 GB. Free memory is still 966.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:32,425 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 252.22 ms. Allocated memory is still 1.0 GB. Free memory was 961.8 MB in the beginning and 951.1 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 33.64 ms. Allocated memory is still 1.0 GB. Free memory is still 951.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 951.1 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 390.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2409.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 966.4 MB in the end (delta: 134.7 MB). Peak memory consumption was 134.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.85 ms. Allocated memory is still 1.2 GB. Free memory is still 966.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) [L39] CALL, EXPR ackermann(m,n) VAL [\old(m)=2, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L18] COND TRUE n==0 VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=1] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L18] COND FALSE !(n==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L21] CALL, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L18] COND TRUE n==0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=0, \old(n)=1] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] return ackermann(m-1,1); [L21] RET, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, m=1, n=1] [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=0, \old(n)=2] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L21] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.3s, OverallIterations: 3, TraceHistogramMax: 5, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 61 SDslu, 68 SDs, 0 SdLazy, 112 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 4834 SizeOfPredicates, 4 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 56/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...