./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/recursive_list.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V --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 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:28:34,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:28:34,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:28:34,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:28:34,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:28:34,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:28:34,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:28:34,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:28:34,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:28:34,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:28:34,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:28:34,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:28:34,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:28:34,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:28:34,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:28:34,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:28:34,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:28:34,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:28:34,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:28:34,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:28:34,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:28:34,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:28:34,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:28:34,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:28:34,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:28:34,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:28:34,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:28:34,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:28:34,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:28:34,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:28:34,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:28:34,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:28:34,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:28:34,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:28:34,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:28:34,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:28:34,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:28:34,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:28:34,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:28:34,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:28:34,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:28:34,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:28:34,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:28:34,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:28:34,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:28:34,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:28:34,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:28:34,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:28:34,437 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:28:34,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:28:34,438 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:28:34,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:28:34,438 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:28:34,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:28:34,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:28:34,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:28:34,440 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:28:34,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:28:34,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:28:34,441 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:28:34,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:28:34,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:28:34,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:28:34,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:28:34,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:28:34,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:28:34,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:28:34,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:28:34,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:28:34,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:28:34,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:28:34,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:28:34,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:28:34,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:28:34,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:28:34,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:28:34,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:28:34,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:28:34,447 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:28:34,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:28:34,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:28:34,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:28:34,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:28:34,449 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52c76a7df26fca079cfc43e405f2f619070583ff933a68f0bba20f0a9dce8e14 [2021-11-23 03:28:34,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:28:34,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:28:34,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:28:34,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:28:34,841 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:28:34,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-regression/recursive_list.i [2021-11-23 03:28:34,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/data/93600f0f2/727942fcb60c4d2499f9465bcebcb60f/FLAG14a3ebe16 [2021-11-23 03:28:35,550 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:28:35,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/sv-benchmarks/c/ldv-regression/recursive_list.i [2021-11-23 03:28:35,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/data/93600f0f2/727942fcb60c4d2499f9465bcebcb60f/FLAG14a3ebe16 [2021-11-23 03:28:35,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/data/93600f0f2/727942fcb60c4d2499f9465bcebcb60f [2021-11-23 03:28:35,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:28:35,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:28:35,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:28:35,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:28:35,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:28:35,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:35" (1/1) ... [2021-11-23 03:28:35,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f68bca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:35, skipping insertion in model container [2021-11-23 03:28:35,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:35" (1/1) ... [2021-11-23 03:28:35,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:28:35,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:28:36,170 WARN L230 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_76b406aa-184c-4648-950a-006a94fccd57/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2021-11-23 03:28:36,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:28:36,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:28:36,224 WARN L230 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_76b406aa-184c-4648-950a-006a94fccd57/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2021-11-23 03:28:36,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:28:36,247 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:28:36,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36 WrapperNode [2021-11-23 03:28:36,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:28:36,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:28:36,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:28:36,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:28:36,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,294 INFO L137 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2021-11-23 03:28:36,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:28:36,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:28:36,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:28:36,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:28:36,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:28:36,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:28:36,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:28:36,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:28:36,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (1/1) ... [2021-11-23 03:28:36,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:28:36,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:36,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:28:36,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:28:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:28:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:28:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:28:36,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:28:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:28:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:28:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:28:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:28:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:28:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:28:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-23 03:28:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-23 03:28:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:28:36,507 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:28:36,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:28:36,670 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:28:36,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:28:36,704 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:28:36,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:36 BoogieIcfgContainer [2021-11-23 03:28:36,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:28:36,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:28:36,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:28:36,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:28:36,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:28:35" (1/3) ... [2021-11-23 03:28:36,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cc8303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:36, skipping insertion in model container [2021-11-23 03:28:36,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:36" (2/3) ... [2021-11-23 03:28:36,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cc8303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:36, skipping insertion in model container [2021-11-23 03:28:36,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:36" (3/3) ... [2021-11-23 03:28:36,718 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-11-23 03:28:36,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:28:36,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:28:36,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:28:36,800 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:28:36,800 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:28:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:28:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:28:36,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:28:36,829 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:28:36,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:28:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:28:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1970376257, now seen corresponding path program 1 times [2021-11-23 03:28:36,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:28:36,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192818711] [2021-11-23 03:28:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:28:36,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:28:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:28:37,091 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:28:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:28:37,259 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:28:37,262 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:28:37,263 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:28:37,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:28:37,273 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-23 03:28:37,279 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:28:37,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:28:37 BoogieIcfgContainer [2021-11-23 03:28:37,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:28:37,348 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:28:37,349 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:28:37,349 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:28:37,350 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:36" (3/4) ... [2021-11-23 03:28:37,352 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:28:37,444 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:28:37,444 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:28:37,445 INFO L158 Benchmark]: Toolchain (without parser) took 1513.62ms. Allocated memory is still 98.6MB. Free memory was 56.9MB in the beginning and 38.2MB in the end (delta: 18.8MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2021-11-23 03:28:37,446 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 72.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:28:37,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.14ms. Allocated memory is still 98.6MB. Free memory was 56.7MB in the beginning and 73.0MB in the end (delta: -16.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 03:28:37,447 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.38ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:28:37,447 INFO L158 Benchmark]: Boogie Preprocessor took 31.65ms. Allocated memory is still 98.6MB. Free memory was 71.3MB in the beginning and 70.4MB in the end (delta: 867.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:28:37,448 INFO L158 Benchmark]: RCFGBuilder took 379.30ms. Allocated memory is still 98.6MB. Free memory was 70.0MB in the beginning and 58.4MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:28:37,449 INFO L158 Benchmark]: TraceAbstraction took 628.45ms. Allocated memory is still 98.6MB. Free memory was 58.0MB in the beginning and 40.2MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 03:28:37,453 INFO L158 Benchmark]: Witness Printer took 95.73ms. Allocated memory is still 98.6MB. Free memory was 40.2MB in the beginning and 38.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:28:37,458 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 72.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.14ms. Allocated memory is still 98.6MB. Free memory was 56.7MB in the beginning and 73.0MB in the end (delta: -16.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.38ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.65ms. Allocated memory is still 98.6MB. Free memory was 71.3MB in the beginning and 70.4MB in the end (delta: 867.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 379.30ms. Allocated memory is still 98.6MB. Free memory was 70.0MB in the beginning and 58.4MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 628.45ms. Allocated memory is still 98.6MB. Free memory was 58.0MB in the beginning and 40.2MB in the end (delta: 17.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Witness Printer took 95.73ms. Allocated memory is still 98.6MB. Free memory was 40.2MB in the beginning and 38.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. 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: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 VAL [i=1, l={5:0}, m={5:0}] [L44] CALL, EXPR append(l, 1) VAL [i=1] [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; [L44] RET, EXPR append(l, 1) VAL [append(l, 1)={-1:0}, i=1, l={5:0}, m={5:0}] [L44] l = append(l, 1) [L45] CALL, EXPR append(l, 2) VAL [i=1] [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; [L45] RET, EXPR append(l, 2) VAL [append(l, 2)={-2:0}, i=1, l={-1:0}, m={5:0}] [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1, l={-2:0}, l->next={-1:0}, l->next->next={5:0}, l->next->next->n=0, m={5:0}] [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 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! [2021-11-23 03:28:37,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b406aa-184c-4648-950a-006a94fccd57/bin/utaipan-EQgc7hIp5V/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