./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/EvenOdd03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eda92234de2991558d0fa68c10405194bf8879d4d71f81bbe5c79bf2cf318fe2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:08:37,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:08:37,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:08:37,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:08:37,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:08:37,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:08:37,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:08:37,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:08:37,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:08:37,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:08:37,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:08:37,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:08:37,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:08:37,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:08:37,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:08:37,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:08:37,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:08:37,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:08:37,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:08:37,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:08:37,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:08:37,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:08:37,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:08:37,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:08:37,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:08:37,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:08:37,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:08:37,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:08:37,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:08:37,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:08:37,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:08:37,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:08:37,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:08:37,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:08:37,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:08:37,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:08:37,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:08:37,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:08:37,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:08:37,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:08:37,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:08:37,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:08:37,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:08:37,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:08:37,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:08:37,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:08:37,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:08:37,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:08:37,925 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:08:37,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:08:37,925 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:08:37,926 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:08:37,926 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:08:37,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:08:37,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:08:37,926 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:08:37,927 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:08:37,927 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:08:37,927 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:08:37,927 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:08:37,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:08:37,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:08:37,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:08:37,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:08:37,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:08:37,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:08:37,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:08:37,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:08:37,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:08:37,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:08:37,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:08:37,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:08:37,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:08:37,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:08:37,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:08:37,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:08:37,931 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:08:37,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:08:37,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:08:37,931 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:08:37,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:08:37,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:08:37,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:08:37,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eda92234de2991558d0fa68c10405194bf8879d4d71f81bbe5c79bf2cf318fe2 [2022-12-14 10:08:38,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:08:38,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:08:38,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:08:38,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:08:38,118 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:08:38,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/recursive/EvenOdd03.c [2022-12-14 10:08:40,748 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:08:40,889 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:08:40,889 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/sv-benchmarks/c/recursive/EvenOdd03.c [2022-12-14 10:08:40,894 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/data/b58142231/485fba850c9a436387567db6d1341b71/FLAG01e35d204 [2022-12-14 10:08:40,906 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/data/b58142231/485fba850c9a436387567db6d1341b71 [2022-12-14 10:08:40,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:08:40,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:08:40,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:08:40,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:08:40,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:08:40,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:08:40" (1/1) ... [2022-12-14 10:08:40,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d26f4c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:40, skipping insertion in model container [2022-12-14 10:08:40,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:08:40" (1/1) ... [2022-12-14 10:08:40,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:08:40,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:08:41,057 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/sv-benchmarks/c/recursive/EvenOdd03.c[974,987] [2022-12-14 10:08:41,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:08:41,071 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:08:41,083 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/sv-benchmarks/c/recursive/EvenOdd03.c[974,987] [2022-12-14 10:08:41,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:08:41,094 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:08:41,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41 WrapperNode [2022-12-14 10:08:41,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:08:41,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:08:41,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:08:41,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:08:41,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,119 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2022-12-14 10:08:41,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:08:41,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:08:41,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:08:41,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:08:41,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:08:41,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:08:41,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:08:41,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:08:41,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (1/1) ... [2022-12-14 10:08:41,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:08:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:41,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:08:41,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:08:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:08:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2022-12-14 10:08:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2022-12-14 10:08:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:08:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2022-12-14 10:08:41,202 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2022-12-14 10:08:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:08:41,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:08:41,263 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:08:41,265 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:08:41,365 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:08:41,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:08:41,379 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 10:08:41,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:08:41 BoogieIcfgContainer [2022-12-14 10:08:41,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:08:41,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:08:41,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:08:41,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:08:41,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:08:40" (1/3) ... [2022-12-14 10:08:41,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbf6071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:08:41, skipping insertion in model container [2022-12-14 10:08:41,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:41" (2/3) ... [2022-12-14 10:08:41,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbf6071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:08:41, skipping insertion in model container [2022-12-14 10:08:41,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:08:41" (3/3) ... [2022-12-14 10:08:41,391 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2022-12-14 10:08:41,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:08:41,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:08:41,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:08:41,460 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d8e4333, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:08:41,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:08:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:08:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:08:41,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:41,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:41,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash 465177429, now seen corresponding path program 1 times [2022-12-14 10:08:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445670298] [2022-12-14 10:08:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:08:41,591 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:08:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:08:41,627 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:08:41,629 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:08:41,630 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:08:41,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:08:41,637 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 10:08:41,641 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 10:08:41,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:08:41 BoogieIcfgContainer [2022-12-14 10:08:41,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 10:08:41,660 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 10:08:41,660 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 10:08:41,660 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 10:08:41,661 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:08:41" (3/4) ... [2022-12-14 10:08:41,663 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 10:08:41,696 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 10:08:41,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 10:08:41,698 INFO L158 Benchmark]: Toolchain (without parser) took 787.72ms. Allocated memory is still 169.9MB. Free memory was 139.3MB in the beginning and 99.4MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-12-14 10:08:41,698 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 59.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:08:41,698 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.00ms. Allocated memory is still 169.9MB. Free memory was 139.3MB in the beginning and 128.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:08:41,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.00ms. Allocated memory is still 169.9MB. Free memory was 128.8MB in the beginning and 127.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:08:41,700 INFO L158 Benchmark]: Boogie Preprocessor took 16.20ms. Allocated memory is still 169.9MB. Free memory was 127.6MB in the beginning and 126.7MB in the end (delta: 893.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:08:41,700 INFO L158 Benchmark]: RCFGBuilder took 245.34ms. Allocated memory is still 169.9MB. Free memory was 126.7MB in the beginning and 115.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:08:41,701 INFO L158 Benchmark]: TraceAbstraction took 274.74ms. Allocated memory is still 169.9MB. Free memory was 115.1MB in the beginning and 101.3MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 10:08:41,701 INFO L158 Benchmark]: Witness Printer took 36.62ms. Allocated memory is still 169.9MB. Free memory was 100.4MB in the beginning and 99.4MB in the end (delta: 949.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:08:41,703 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 119.5MB. Free memory is still 59.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.00ms. Allocated memory is still 169.9MB. Free memory was 139.3MB in the beginning and 128.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.00ms. Allocated memory is still 169.9MB. Free memory was 128.8MB in the beginning and 127.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.20ms. Allocated memory is still 169.9MB. Free memory was 127.6MB in the beginning and 126.7MB in the end (delta: 893.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 245.34ms. Allocated memory is still 169.9MB. Free memory was 126.7MB in the beginning and 115.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 274.74ms. Allocated memory is still 169.9MB. Free memory was 115.1MB in the beginning and 101.3MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 36.62ms. Allocated memory is still 169.9MB. Free memory was 100.4MB in the beginning and 99.4MB in the end (delta: 949.3kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 49]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L40] int n = __VERIFIER_nondet_int(); [L41] COND FALSE !(n < 0) VAL [n=0] [L44] CALL, EXPR isEven(n) VAL [\old(n)=0] [L29] COND TRUE n == 0 [L30] return 1; VAL [\old(n)=0, \result=1, n=0] [L44] RET, EXPR isEven(n) VAL [isEven(n)=1, n=0] [L44] int result = isEven(n); [L45] int mod = n % 2; VAL [mod=0, n=0, result=1] [L46] COND FALSE !(result < 0 || result == mod) VAL [mod=0, n=0, result=1] [L49] reach_error() VAL [mod=0, n=0, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 10:08:41,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aca35b-46cb-4c1f-9e47-af574ded0e29/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE