./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/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 a033d09eab07f8bc6e49bb4301ebd6c89110f535 .......................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/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 a033d09eab07f8bc6e49bb4301ebd6c89110f535 ....................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 03:38:03,948 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 03:38:03,949 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 03:38:03,955 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 03:38:03,955 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 03:38:03,956 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 03:38:03,957 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 03:38:03,957 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 03:38:03,958 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 03:38:03,959 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 03:38:03,959 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 03:38:03,959 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 03:38:03,960 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 03:38:03,961 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 03:38:03,961 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 03:38:03,962 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 03:38:03,962 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 03:38:03,963 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 03:38:03,964 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 03:38:03,965 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 03:38:03,965 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 03:38:03,966 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 03:38:03,967 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 03:38:03,967 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 03:38:03,967 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 03:38:03,968 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 03:38:03,968 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 03:38:03,969 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 03:38:03,969 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 03:38:03,970 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 03:38:03,970 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 03:38:03,970 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 03:38:03,971 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 03:38:03,971 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 03:38:03,971 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 03:38:03,972 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 03:38:03,972 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 03:38:03,979 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 03:38:03,979 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 03:38:03,980 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 03:38:03,980 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 03:38:03,980 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 03:38:03,980 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 03:38:03,980 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 03:38:03,980 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 03:38:03,981 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 03:38:03,981 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 03:38:03,981 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 03:38:03,981 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 03:38:03,981 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 03:38:03,981 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 03:38:03,982 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 03:38:03,983 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 03:38:03,983 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 03:38:03,983 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 03:38:03,983 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 03:38:03,983 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 03:38:03,983 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 03:38:03,983 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 03:38:03,984 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 03:38:03,984 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 03:38:03,984 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 03:38:03,984 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 03:38:03,984 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 03:38:03,984 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 03:38:03,984 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 03:38:03,984 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_37774cd8-9d17-4c0d-b690-730e6afbf7f1/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 -> a033d09eab07f8bc6e49bb4301ebd6c89110f535 [2018-12-03 03:38:04,002 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 03:38:04,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 03:38:04,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 03:38:04,011 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 03:38:04,011 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 03:38:04,012 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 03:38:04,047 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/f76c13b0a/44e9c38a07a14ee08fe0e8a1d72118f5/FLAGb777b61aa [2018-12-03 03:38:04,260 INFO L307 CDTParser]: Found 0 translation units. [2018-12-03 03:38:04,265 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/f76c13b0a/44e9c38a07a14ee08fe0e8a1d72118f5/FLAGb777b61aa [2018-12-03 03:38:04,785 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/f76c13b0a/44e9c38a07a14ee08fe0e8a1d72118f5 [2018-12-03 03:38:04,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 03:38:04,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 03:38:04,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 03:38:04,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 03:38:04,793 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 03:38:04,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 03:38:04" (1/1) ... [2018-12-03 03:38:04,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1f6e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:04, skipping insertion in model container [2018-12-03 03:38:04,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 03:38:04" (1/1) ... [2018-12-03 03:38:04,797 INFO L95 ieTranslatorObserver]: Witness extractor is disabled for multiple files [2018-12-03 03:38:04,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 03:38:04,802 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.util.NoSuchElementException: No value present at java.util.Optional.get(Optional.java:135) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:149) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:117) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:129) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-12-03 03:38:04,804 INFO L168 Benchmark]: Toolchain (without parser) took 17.06 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 952.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-03 03:38:04,806 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:38:04,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 14.45 ms. Allocated memory is still 1.0 GB. Free memory is still 952.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:38:04,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 14.45 ms. Allocated memory is still 1.0 GB. Free memory is still 952.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: NoSuchElementException: No value present de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: NoSuchElementException: No value present: java.util.Optional.get(Optional.java:135) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-03 03:38:05,833 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 03:38:05,834 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 03:38:05,839 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 03:38:05,840 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 03:38:05,840 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 03:38:05,841 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 03:38:05,842 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 03:38:05,842 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 03:38:05,843 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 03:38:05,843 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 03:38:05,843 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 03:38:05,844 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 03:38:05,844 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 03:38:05,845 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 03:38:05,845 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 03:38:05,845 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 03:38:05,846 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 03:38:05,847 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 03:38:05,848 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 03:38:05,848 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 03:38:05,849 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 03:38:05,850 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 03:38:05,850 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 03:38:05,850 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 03:38:05,850 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 03:38:05,851 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 03:38:05,851 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 03:38:05,852 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 03:38:05,852 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 03:38:05,852 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 03:38:05,853 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 03:38:05,853 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 03:38:05,853 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 03:38:05,853 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 03:38:05,854 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 03:38:05,854 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-03 03:38:05,861 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 03:38:05,861 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 03:38:05,862 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 03:38:05,862 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 03:38:05,862 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 03:38:05,862 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 03:38:05,862 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 03:38:05,862 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 03:38:05,862 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 03:38:05,862 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 03:38:05,863 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-03 03:38:05,863 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 03:38:05,864 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 03:38:05,864 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 03:38:05,864 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 03:38:05,865 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 03:38:05,865 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-03 03:38:05,865 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 03:38:05,865 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-03 03:38:05,865 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-03 03:38:05,865 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_37774cd8-9d17-4c0d-b690-730e6afbf7f1/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 -> a033d09eab07f8bc6e49bb4301ebd6c89110f535 [2018-12-03 03:38:05,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 03:38:05,893 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 03:38:05,896 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 03:38:05,897 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 03:38:05,897 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 03:38:05,898 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 03:38:05,942 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/b90abaade/90f9f4d7471a4bd681f8f1fc602798b8/FLAG27e27bd83 [2018-12-03 03:38:06,349 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 03:38:06,350 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 03:38:06,353 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/b90abaade/90f9f4d7471a4bd681f8f1fc602798b8/FLAG27e27bd83 [2018-12-03 03:38:06,361 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/data/b90abaade/90f9f4d7471a4bd681f8f1fc602798b8 [2018-12-03 03:38:06,362 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 03:38:06,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 03:38:06,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 03:38:06,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 03:38:06,366 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 03:38:06,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60337f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06, skipping insertion in model container [2018-12-03 03:38:06,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 03:38:06,381 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 03:38:06,468 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 03:38:06,471 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 03:38:06,480 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 03:38:06,488 INFO L195 MainTranslator]: Completed translation [2018-12-03 03:38:06,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06 WrapperNode [2018-12-03 03:38:06,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 03:38:06,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 03:38:06,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 03:38:06,489 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 03:38:06,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 03:38:06,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 03:38:06,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 03:38:06,502 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 03:38:06,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... [2018-12-03 03:38:06,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 03:38:06,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 03:38:06,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 03:38:06,514 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 03:38:06,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 03:38:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 03:38:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 03:38:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-12-03 03:38:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-12-03 03:38:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 03:38:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 03:38:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 03:38:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 03:38:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-03 03:38:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-03 03:38:06,683 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 03:38:06,683 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 03:38:06,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:38:06 BoogieIcfgContainer [2018-12-03 03:38:06,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 03:38:06,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 03:38:06,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 03:38:06,686 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 03:38:06,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 03:38:06" (1/3) ... [2018-12-03 03:38:06,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f0ff69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:38:06, skipping insertion in model container [2018-12-03 03:38:06,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 03:38:06" (2/3) ... [2018-12-03 03:38:06,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f0ff69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 03:38:06, skipping insertion in model container [2018-12-03 03:38:06,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:38:06" (3/3) ... [2018-12-03 03:38:06,688 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-03 03:38:06,693 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 03:38:06,697 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 03:38:06,706 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 03:38:06,727 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-03 03:38:06,728 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 03:38:06,728 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 03:38:06,728 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 03:38:06,728 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 03:38:06,728 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 03:38:06,728 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 03:38:06,728 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 03:38:06,728 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 03:38:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-12-03 03:38:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 03:38:06,741 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:38:06,741 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:38:06,742 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:38:06,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:38:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-12-03 03:38:06,748 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 03:38:06,748 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/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 [2018-12-03 03:38:06,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:38:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:38:06,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:38:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 03:38:06,822 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 03:38:06,824 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 03:38:06,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 03:38:06,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 03:38:06,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 03:38:06,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 03:38:06,836 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-12-03 03:38:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:38:06,873 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-12-03 03:38:06,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 03:38:06,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 03:38:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:38:06,880 INFO L225 Difference]: With dead ends: 40 [2018-12-03 03:38:06,880 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 03:38:06,882 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 03:38:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 03:38:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-03 03:38:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 03:38:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-03 03:38:06,906 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-12-03 03:38:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:38:06,906 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-03 03:38:06,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 03:38:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-03 03:38:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 03:38:06,907 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:38:06,907 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:38:06,908 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:38:06,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:38:06,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-12-03 03:38:06,908 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 03:38:06,908 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/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 [2018-12-03 03:38:06,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:38:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:38:06,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:38:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 03:38:06,944 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 03:38:06,944 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 03:38:06,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 03:38:06,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 03:38:06,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 03:38:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 03:38:06,946 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-12-03 03:38:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:38:06,954 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-03 03:38:06,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 03:38:06,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-03 03:38:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:38:06,955 INFO L225 Difference]: With dead ends: 32 [2018-12-03 03:38:06,955 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 03:38:06,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 03:38:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 03:38:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-03 03:38:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 03:38:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-03 03:38:06,959 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2018-12-03 03:38:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:38:06,959 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-03 03:38:06,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 03:38:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-03 03:38:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 03:38:06,959 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:38:06,959 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 03:38:06,960 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:38:06,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:38:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-12-03 03:38:06,960 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 03:38:06,960 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 03:38:06,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:38:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:38:06,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:38:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 03:38:07,028 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 03:38:07,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 03:38:07,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-03 03:38:07,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 03:38:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 03:38:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-03 03:38:07,030 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2018-12-03 03:38:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:38:07,076 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2018-12-03 03:38:07,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 03:38:07,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-12-03 03:38:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:38:07,077 INFO L225 Difference]: With dead ends: 48 [2018-12-03 03:38:07,077 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 03:38:07,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-03 03:38:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 03:38:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-03 03:38:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 03:38:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-03 03:38:07,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-12-03 03:38:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:38:07,081 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-03 03:38:07,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 03:38:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-03 03:38:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 03:38:07,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:38:07,082 INFO L402 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, 1, 1] [2018-12-03 03:38:07,082 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:38:07,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:38:07,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2018-12-03 03:38:07,083 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 03:38:07,083 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/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 [2018-12-03 03:38:07,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:38:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 03:38:07,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 03:38:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 03:38:07,161 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 03:38:07,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 03:38:07,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-03 03:38:07,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 03:38:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 03:38:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-03 03:38:07,163 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-12-03 03:38:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 03:38:07,193 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2018-12-03 03:38:07,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 03:38:07,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-03 03:38:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 03:38:07,195 INFO L225 Difference]: With dead ends: 50 [2018-12-03 03:38:07,195 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 03:38:07,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-03 03:38:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 03:38:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-12-03 03:38:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 03:38:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 03:38:07,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-12-03 03:38:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 03:38:07,199 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 03:38:07,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 03:38:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 03:38:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 03:38:07,199 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 03:38:07,199 INFO L402 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, 1, 1] [2018-12-03 03:38:07,199 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 03:38:07,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 03:38:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-12-03 03:38:07,200 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 03:38:07,200 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 03:38:07,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 03:38:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 03:38:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-03 03:38:07,263 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-03 03:38:07,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 03:38:07 BoogieIcfgContainer [2018-12-03 03:38:07,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 03:38:07,280 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 03:38:07,280 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 03:38:07,280 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 03:38:07,281 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 03:38:06" (3/4) ... [2018-12-03 03:38:07,282 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-03 03:38:07,307 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_37774cd8-9d17-4c0d-b690-730e6afbf7f1/bin-2019/utaipan/witness.graphml [2018-12-03 03:38:07,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 03:38:07,308 INFO L168 Benchmark]: Toolchain (without parser) took 945.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -64.3 MB). Peak memory consumption was 73.1 MB. Max. memory is 11.5 GB. [2018-12-03 03:38:07,309 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:38:07,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.12 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 03:38:07,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.38 ms. Allocated memory is still 1.0 GB. Free memory is still 934.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:38:07,309 INFO L168 Benchmark]: Boogie Preprocessor took 12.23 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-03 03:38:07,310 INFO L168 Benchmark]: RCFGBuilder took 169.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2018-12-03 03:38:07,310 INFO L168 Benchmark]: TraceAbstraction took 595.99 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: 105.8 MB). Peak memory consumption was 105.8 MB. Max. memory is 11.5 GB. [2018-12-03 03:38:07,310 INFO L168 Benchmark]: Witness Printer took 27.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 03:38:07,312 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 125.12 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 934.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.38 ms. Allocated memory is still 1.0 GB. Free memory is still 934.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.23 ms. Allocated memory is still 1.0 GB. Free memory was 934.0 MB in the beginning and 928.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 169.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 928.6 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 595.99 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: 105.8 MB). Peak memory consumption was 105.8 MB. Max. memory is 11.5 GB. * Witness Printer took 27.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) VAL [\old(x)=2] [L8] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L15] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L16] CALL, EXPR id(x-1) VAL [\old(x)=0] [L8] COND TRUE x==0 [L8] return 0; VAL [\old(x)=0, \result=0, x=0] [L16] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L9] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L23] RET, EXPR id(input) VAL [id(input)=2, input=2] [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 VAL [input=2, result=2] [L25] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. UNSAFE Result, 0.5s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 6 SDslu, 493 SDs, 0 SdLazy, 68 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 3026 SizeOfPredicates, 6 NumberOfNonLiveVariables, 128 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...