./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/recursive_list.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer --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 Automizer --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-a4ecdab [2020-11-28 03:06:32,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:06:32,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:06:32,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:06:32,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:06:32,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:06:32,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:06:32,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:06:32,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:06:32,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:06:32,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:06:32,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:06:32,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:06:32,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:06:32,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:06:32,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:06:32,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:06:32,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:06:32,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:06:32,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:06:32,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:06:32,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:06:32,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:06:32,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:06:32,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:06:32,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:06:32,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:06:32,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:06:32,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:06:32,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:06:32,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:06:32,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:06:32,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:06:32,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:06:32,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:06:32,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:06:32,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:06:32,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:06:32,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:06:32,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:06:32,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:06:32,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:06:32,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:06:32,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:06:32,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:06:32,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:06:32,865 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:06:32,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:06:32,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:06:32,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:06:32,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:06:32,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:06:32,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:06:32,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:06:32,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:06:32,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:06:32,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:06:32,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:06:32,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:06:32,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:06:32,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:06:32,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:06:32,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:06:32,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:06:32,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:06:32,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:06:32,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:06:32,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:06:32,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:06:32,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:06:32,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:06:32,875 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-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b220fd67c69dd62d320a9e830f108e76b0f2e5 [2020-11-28 03:06:33,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:06:33,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:06:33,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:06:33,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:06:33,295 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:06:33,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/recursive_list.i [2020-11-28 03:06:33,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/data/621f2a666/715952407cae47058f24d6d31a6eb8aa/FLAG3030b84b9 [2020-11-28 03:06:34,068 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:06:34,069 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/sv-benchmarks/c/ldv-regression/recursive_list.i [2020-11-28 03:06:34,077 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/data/621f2a666/715952407cae47058f24d6d31a6eb8aa/FLAG3030b84b9 [2020-11-28 03:06:34,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/data/621f2a666/715952407cae47058f24d6d31a6eb8aa [2020-11-28 03:06:34,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:06:34,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:06:34,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:06:34,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:06:34,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:06:34,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcb35f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34, skipping insertion in model container [2020-11-28 03:06:34,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:06:34,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:06:34,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:06:34,815 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:06:34,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:06:34,855 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:06:34,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34 WrapperNode [2020-11-28 03:06:34,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:06:34,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:06:34,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:06:34,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:06:34,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:06:34,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:06:34,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:06:34,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:06:34,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... [2020-11-28 03:06:34,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:06:34,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:06:34,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:06:34,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:06:34,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/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 [2020-11-28 03:06:35,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 03:06:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:06:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 03:06:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:06:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:06:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:06:35,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:06:35,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:06:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:06:35,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:06:35,463 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:06:35,464 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-28 03:06:35,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:35 BoogieIcfgContainer [2020-11-28 03:06:35,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:06:35,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:06:35,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:06:35,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:06:35,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:06:34" (1/3) ... [2020-11-28 03:06:35,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d940517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:06:35, skipping insertion in model container [2020-11-28 03:06:35,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:34" (2/3) ... [2020-11-28 03:06:35,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d940517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:06:35, skipping insertion in model container [2020-11-28 03:06:35,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:35" (3/3) ... [2020-11-28 03:06:35,477 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-11-28 03:06:35,490 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:06:35,496 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:06:35,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:06:35,555 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:06:35,566 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:06:35,567 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:06:35,567 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:06:35,567 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:06:35,567 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:06:35,568 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:06:35,568 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:06:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-28 03:06:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:06:35,589 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:06:35,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:35,590 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:06:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash 87858985, now seen corresponding path program 1 times [2020-11-28 03:06:35,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:35,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217210642] [2020-11-28 03:06:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:35,787 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:35,890 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:35,951 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:35,952 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:06:35,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:06:36,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:06:36 BoogieIcfgContainer [2020-11-28 03:06:36,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:06:36,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:06:36,026 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:06:36,026 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:06:36,026 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:35" (3/4) ... [2020-11-28 03:06:36,030 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:06:36,130 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c8174bfd-cb74-422f-b35c-972255e540da/bin/uautomizer/witness.graphml [2020-11-28 03:06:36,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:06:36,132 INFO L168 Benchmark]: Toolchain (without parser) took 1684.09 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 48.4 MB in the end (delta: 31.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:36,133 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 77.6 MB. Free memory is still 35.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:36,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.39 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 86.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:36,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 84.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:36,135 INFO L168 Benchmark]: Boogie Preprocessor took 33.14 ms. Allocated memory is still 109.1 MB. Free memory was 84.7 MB in the beginning and 83.8 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:36,136 INFO L168 Benchmark]: RCFGBuilder took 530.93 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 67.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:36,136 INFO L168 Benchmark]: TraceAbstraction took 553.83 ms. Allocated memory is still 109.1 MB. Free memory was 67.3 MB in the beginning and 50.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:36,137 INFO L168 Benchmark]: Witness Printer took 104.79 ms. Allocated memory is still 109.1 MB. Free memory was 50.5 MB in the beginning and 48.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:36,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 77.6 MB. Free memory is still 35.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 404.39 ms. Allocated memory is still 109.1 MB. Free memory was 79.4 MB in the beginning and 86.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 84.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.14 ms. Allocated memory is still 109.1 MB. Free memory was 84.7 MB in the beginning and 83.8 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 530.93 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 67.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 553.83 ms. Allocated memory is still 109.1 MB. Free memory was 67.3 MB in the beginning and 50.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Witness Printer took 104.79 ms. Allocated memory is still 109.1 MB. Free memory was 50.5 MB in the beginning and 48.4 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int i = 1; VAL [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); VAL [i=1] [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [i=1] [L44] l = append(l, 1) [L27] struct list *new_el; [L22] return malloc(8U); VAL [i=1] [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [i=1] [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 [L3] __assert_fail("0", "recursive_list.i", 3, "reach_error") VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, 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=14occurred 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, 8 NumberOfCodeBlocks, 8 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...