./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI --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 37b220fd67c69dd62d320a9e830f108e76b0f2e5 .......................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:29:37,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:37,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:37,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:37,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:37,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:37,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:37,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:37,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:37,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:37,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:37,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:37,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:37,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:37,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:37,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:37,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:37,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:37,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:37,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:37,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:37,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:37,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:37,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:37,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:37,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:37,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:37,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:37,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:37,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:37,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:37,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:37,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:37,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:37,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:37,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:37,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:37,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:37,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:37,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:37,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:37,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:37,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:37,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:37,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:37,518 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:37,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:37,518 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:37,518 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:37,518 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:37,519 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:37,519 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:37,519 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:37,519 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:37,519 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:37,520 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:37,520 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:37,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:37,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:37,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:37,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:37,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:37,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:37,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:37,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:37,522 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:37,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:37,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:37,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:37,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:37,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:37,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:37,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:37,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:37,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:37,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:37,525 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:37,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:37,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:37,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:37,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:37,526 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_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b220fd67c69dd62d320a9e830f108e76b0f2e5 [2021-10-11 02:29:37,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:37,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:37,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:37,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:37,810 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:37,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/recursive_list.i [2021-10-11 02:29:37,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/data/c4dd09aca/3f1ac20c37c141ef9da997930a640f4d/FLAGa520d7079 [2021-10-11 02:29:38,361 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:38,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/sv-benchmarks/c/ldv-regression/recursive_list.i [2021-10-11 02:29:38,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/data/c4dd09aca/3f1ac20c37c141ef9da997930a640f4d/FLAGa520d7079 [2021-10-11 02:29:38,753 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/data/c4dd09aca/3f1ac20c37c141ef9da997930a640f4d [2021-10-11 02:29:38,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:38,757 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:38,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:38,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:38,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:38,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:38" (1/1) ... [2021-10-11 02:29:38,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c1514d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:38, skipping insertion in model container [2021-10-11 02:29:38,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:38" (1/1) ... [2021-10-11 02:29:38,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:38,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:38,932 WARN L226 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_720f68f4-8696-4b40-8a9d-0be9cb1236ae/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2021-10-11 02:29:38,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:38,973 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:38,984 WARN L226 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_720f68f4-8696-4b40-8a9d-0be9cb1236ae/sv-benchmarks/c/ldv-regression/recursive_list.i[409,422] [2021-10-11 02:29:38,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:39,004 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:39,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39 WrapperNode [2021-10-11 02:29:39,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:39,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:39,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:39,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:39,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:39,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:39,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:39,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:39,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... [2021-10-11 02:29:39,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:39,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:39,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:39,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:39,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:29:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:29:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:29:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:29:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:29:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:39,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:29:39,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:29:39,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:39,836 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-11 02:29:39,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:39 BoogieIcfgContainer [2021-10-11 02:29:39,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:39,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:39,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:39,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:39,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:38" (1/3) ... [2021-10-11 02:29:39,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbb1524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:39, skipping insertion in model container [2021-10-11 02:29:39,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:39" (2/3) ... [2021-10-11 02:29:39,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbb1524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:39, skipping insertion in model container [2021-10-11 02:29:39,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:39" (3/3) ... [2021-10-11 02:29:39,868 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-10-11 02:29:39,885 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:39,889 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:39,900 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:39,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:39,936 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:39,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:39,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:39,936 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:39,937 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:39,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:39,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:29:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:29:39,953 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:39,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:29:39,954 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash 59039, now seen corresponding path program 1 times [2021-10-11 02:29:39,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:39,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134232192] [2021-10-11 02:29:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:40,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:40,156 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:40,183 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:29:40,187 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:40,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:40,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:40 BoogieIcfgContainer [2021-10-11 02:29:40,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:40,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:40,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:40,225 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:40,226 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:39" (3/4) ... [2021-10-11 02:29:40,228 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:29:40,306 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_720f68f4-8696-4b40-8a9d-0be9cb1236ae/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:40,310 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:40,312 INFO L168 Benchmark]: Toolchain (without parser) took 1553.96 ms. Allocated memory was 102.8 MB in the beginning and 144.7 MB in the end (delta: 41.9 MB). Free memory was 73.4 MB in the beginning and 101.6 MB in the end (delta: -28.3 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:40,313 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 102.8 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:40,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.20 ms. Allocated memory was 102.8 MB in the beginning and 144.7 MB in the end (delta: 41.9 MB). Free memory was 73.1 MB in the beginning and 119.9 MB in the end (delta: -46.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:40,315 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.55 ms. Allocated memory is still 144.7 MB. Free memory was 119.9 MB in the beginning and 118.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:40,315 INFO L168 Benchmark]: Boogie Preprocessor took 44.93 ms. Allocated memory is still 144.7 MB. Free memory was 118.4 MB in the beginning and 117.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:40,316 INFO L168 Benchmark]: RCFGBuilder took 738.63 ms. Allocated memory is still 144.7 MB. Free memory was 117.3 MB in the beginning and 119.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 42.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:40,317 INFO L168 Benchmark]: TraceAbstraction took 381.82 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 103.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:40,318 INFO L168 Benchmark]: Witness Printer took 86.11 ms. Allocated memory is still 144.7 MB. Free memory was 103.7 MB in the beginning and 101.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:40,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 102.8 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.20 ms. Allocated memory was 102.8 MB in the beginning and 144.7 MB in the end (delta: 41.9 MB). Free memory was 73.1 MB in the beginning and 119.9 MB in the end (delta: -46.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.55 ms. Allocated memory is still 144.7 MB. Free memory was 119.9 MB in the beginning and 118.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.93 ms. Allocated memory is still 144.7 MB. Free memory was 118.4 MB in the beginning and 117.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 738.63 ms. Allocated memory is still 144.7 MB. Free memory was 117.3 MB in the beginning and 119.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 42.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 381.82 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 103.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 86.11 ms. Allocated memory is still 144.7 MB. Free memory was 103.7 MB in the beginning and 101.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 [L27] struct list *new_el; [L22] return malloc(8U); [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; [L44] l = append(l, 1) [L27] struct list *new_el; [L22] return malloc(8U); [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1] [L50] COND TRUE l->next->next->n == 0 [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=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, 3 NumberOfCodeBlocks, 3 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! Received shutdown request...