./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a10fd260c2f708e346588150444ddfe9656de05 ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 17:00:38,828 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 17:00:38,829 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 17:00:38,835 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 17:00:38,836 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 17:00:38,836 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 17:00:38,837 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 17:00:38,838 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 17:00:38,839 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 17:00:38,839 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 17:00:38,840 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 17:00:38,840 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 17:00:38,840 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 17:00:38,841 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 17:00:38,842 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 17:00:38,842 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 17:00:38,843 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 17:00:38,843 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 17:00:38,844 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 17:00:38,845 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 17:00:38,846 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 17:00:38,847 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 17:00:38,848 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 17:00:38,848 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 17:00:38,848 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 17:00:38,849 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 17:00:38,849 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 17:00:38,850 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 17:00:38,850 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 17:00:38,851 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 17:00:38,851 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 17:00:38,851 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 17:00:38,851 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 17:00:38,851 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 17:00:38,852 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 17:00:38,852 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 17:00:38,853 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 17:00:38,860 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 17:00:38,860 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 17:00:38,860 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 17:00:38,861 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 17:00:38,861 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 17:00:38,862 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 17:00:38,862 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 17:00:38,862 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 17:00:38,862 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 17:00:38,862 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 17:00:38,862 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 17:00:38,863 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 17:00:38,863 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 17:00:38,864 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 17:00:38,864 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 17:00:38,865 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 17:00:38,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 17:00:38,865 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 17:00:38,865 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a10fd260c2f708e346588150444ddfe9656de05 [2018-12-08 17:00:38,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 17:00:38,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 17:00:38,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 17:00:38,895 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 17:00:38,895 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 17:00:38,895 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i [2018-12-08 17:00:38,940 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/data/618f0818a/2707612cf5184c659a390afc8c0b4052/FLAG4422471c1 [2018-12-08 17:00:39,328 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 17:00:39,328 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl_false-unreach-call.i [2018-12-08 17:00:39,334 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/data/618f0818a/2707612cf5184c659a390afc8c0b4052/FLAG4422471c1 [2018-12-08 17:00:39,691 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/data/618f0818a/2707612cf5184c659a390afc8c0b4052 [2018-12-08 17:00:39,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 17:00:39,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 17:00:39,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 17:00:39,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 17:00:39,705 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 17:00:39,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:39,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1763142b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39, skipping insertion in model container [2018-12-08 17:00:39,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:39,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 17:00:39,730 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 17:00:39,877 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 17:00:39,882 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 17:00:39,949 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 17:00:39,982 INFO L195 MainTranslator]: Completed translation [2018-12-08 17:00:39,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39 WrapperNode [2018-12-08 17:00:39,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 17:00:39,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 17:00:39,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 17:00:39,983 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 17:00:39,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:39,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 17:00:40,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 17:00:40,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 17:00:40,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 17:00:40,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... [2018-12-08 17:00:40,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 17:00:40,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 17:00:40,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 17:00:40,026 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 17:00:40,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 17:00:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-12-08 17:00:40,058 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-12-08 17:00:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-08 17:00:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-08 17:00:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2018-12-08 17:00:40,058 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2018-12-08 17:00:40,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 17:00:40,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 17:00:40,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2018-12-08 17:00:40,059 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2018-12-08 17:00:40,059 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-08 17:00:40,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 17:00:40,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 17:00:40,300 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 17:00:40,300 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-08 17:00:40,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:00:40 BoogieIcfgContainer [2018-12-08 17:00:40,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 17:00:40,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 17:00:40,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 17:00:40,303 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 17:00:40,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 05:00:39" (1/3) ... [2018-12-08 17:00:40,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e1ba90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 05:00:40, skipping insertion in model container [2018-12-08 17:00:40,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 05:00:39" (2/3) ... [2018-12-08 17:00:40,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e1ba90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 05:00:40, skipping insertion in model container [2018-12-08 17:00:40,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:00:40" (3/3) ... [2018-12-08 17:00:40,305 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl_false-unreach-call.i [2018-12-08 17:00:40,311 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 17:00:40,316 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 17:00:40,326 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 17:00:40,344 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 17:00:40,344 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 17:00:40,344 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 17:00:40,345 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 17:00:40,345 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 17:00:40,345 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 17:00:40,345 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 17:00:40,345 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 17:00:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2018-12-08 17:00:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 17:00:40,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:00:40,359 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:00:40,360 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:00:40,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:00:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash -211103612, now seen corresponding path program 1 times [2018-12-08 17:00:40,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:00:40,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:40,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:00:40,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:40,393 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:00:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:00:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:00:40,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:00:40,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 17:00:40,441 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 17:00:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 17:00:40,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 17:00:40,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 17:00:40,453 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2018-12-08 17:00:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:00:40,468 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2018-12-08 17:00:40,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 17:00:40,468 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-12-08 17:00:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:00:40,473 INFO L225 Difference]: With dead ends: 92 [2018-12-08 17:00:40,473 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 17:00:40,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 17:00:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 17:00:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-08 17:00:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 17:00:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 17:00:40,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-08 17:00:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:00:40,495 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 17:00:40,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 17:00:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 17:00:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 17:00:40,496 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:00:40,496 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:00:40,496 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:00:40,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:00:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085091, now seen corresponding path program 1 times [2018-12-08 17:00:40,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:00:40,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:40,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:00:40,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:40,497 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:00:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:00:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:00:40,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 17:00:40,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 17:00:40,556 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 17:00:40,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 17:00:40,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 17:00:40,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 17:00:40,557 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-12-08 17:00:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:00:40,607 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-12-08 17:00:40,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 17:00:40,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 17:00:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:00:40,608 INFO L225 Difference]: With dead ends: 33 [2018-12-08 17:00:40,608 INFO L226 Difference]: Without dead ends: 31 [2018-12-08 17:00:40,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-12-08 17:00:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-08 17:00:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2018-12-08 17:00:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-08 17:00:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-12-08 17:00:40,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2018-12-08 17:00:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:00:40,611 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-12-08 17:00:40,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 17:00:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-12-08 17:00:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-08 17:00:40,612 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:00:40,612 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:00:40,612 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:00:40,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:00:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1771436792, now seen corresponding path program 1 times [2018-12-08 17:00:40,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:00:40,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:40,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:00:40,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:40,613 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:00:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:00:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:00:40,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:00:40,692 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 17:00:40,692 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-12-08 17:00:40,694 INFO L205 CegarAbsIntRunner]: [50], [56], [58], [63], [66], [80], [89], [92], [94], [97], [99], [122], [123], [158], [159], [160] [2018-12-08 17:00:40,713 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 17:00:40,714 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 17:00:40,816 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 17:00:40,817 INFO L272 AbstractInterpreter]: Visited 16 different actions 21 times. Merged at 5 different actions 5 times. Never widened. Performed 172 root evaluator evaluations with a maximum evaluation depth of 3. Performed 172 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-12-08 17:00:40,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:00:40,822 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 17:00:40,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 17:00:40,822 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 17:00:40,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:00:40,831 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 17:00:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 17:00:40,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 17:00:40,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-08 17:00:40,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-08 17:00:40,884 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,886 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-12-08 17:00:40,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-12-08 17:00:40,893 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,894 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,898 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,898 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2018-12-08 17:00:40,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-12-08 17:00:40,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-12-08 17:00:40,907 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,908 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-12-08 17:00:40,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-12-08 17:00:40,919 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,920 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,923 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,924 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2018-12-08 17:00:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:00:40,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 17:00:40,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-12-08 17:00:40,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-12-08 17:00:40,968 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,970 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-12-08 17:00:40,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-12-08 17:00:40,974 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,975 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-08 17:00:40,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-12-08 17:00:40,985 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2018-12-08 17:00:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 17:00:41,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 17:00:41,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 8 [2018-12-08 17:00:41,012 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 17:00:41,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 17:00:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 17:00:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-12-08 17:00:41,013 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-12-08 17:00:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 17:00:41,060 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-12-08 17:00:41,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 17:00:41,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-12-08 17:00:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 17:00:41,061 INFO L225 Difference]: With dead ends: 37 [2018-12-08 17:00:41,061 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 17:00:41,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-12-08 17:00:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 17:00:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-12-08 17:00:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-08 17:00:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-08 17:00:41,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-12-08 17:00:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 17:00:41,064 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-08 17:00:41,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 17:00:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-08 17:00:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-08 17:00:41,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 17:00:41,065 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 17:00:41,065 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 17:00:41,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 17:00:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1763687606, now seen corresponding path program 1 times [2018-12-08 17:00:41,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 17:00:41,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:41,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 17:00:41,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 17:00:41,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 17:00:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 17:00:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 17:00:41,105 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 17:00:41,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 05:00:41 BoogieIcfgContainer [2018-12-08 17:00:41,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 17:00:41,123 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 17:00:41,123 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 17:00:41,123 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 17:00:41,124 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 05:00:40" (3/4) ... [2018-12-08 17:00:41,125 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 17:00:41,154 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ff8a60ab-9f5f-4732-aa89-56042f32503c/bin-2019/utaipan/witness.graphml [2018-12-08 17:00:41,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 17:00:41,155 INFO L168 Benchmark]: Toolchain (without parser) took 1457.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 947.0 MB in the beginning and 945.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 130.8 MB. Max. memory is 11.5 GB. [2018-12-08 17:00:41,155 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:00:41,156 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. [2018-12-08 17:00:41,156 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.72 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:00:41,156 INFO L168 Benchmark]: Boogie Preprocessor took 23.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2018-12-08 17:00:41,157 INFO L168 Benchmark]: RCFGBuilder took 274.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.8 MB). Peak memory consumption was 30.8 MB. Max. memory is 11.5 GB. [2018-12-08 17:00:41,157 INFO L168 Benchmark]: TraceAbstraction took 821.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 945.7 MB in the end (delta: 127.4 MB). Peak memory consumption was 127.4 MB. Max. memory is 11.5 GB. [2018-12-08 17:00:41,157 INFO L168 Benchmark]: Witness Printer took 31.18 ms. Allocated memory is still 1.2 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 17:00:41,160 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 282.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.72 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 274.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.8 MB). Peak memory consumption was 30.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 821.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 945.7 MB in the end (delta: 127.4 MB). Peak memory consumption was 127.4 MB. Max. memory is 11.5 GB. * Witness Printer took 31.18 ms. Allocated memory is still 1.2 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); VAL [a={14:0}, malloc(sizeof(struct node))={14:0}] [L586] COND FALSE !(a == 0) VAL [a={14:0}, malloc(sizeof(struct node))={14:0}] [L587] List t; [L588] List p = a; [L589] a->h = 2 VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, p={14:0}] [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] [L593] COND FALSE !(t == 0) VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] [L600] COND TRUE p!=0 [L601] EXPR p->h VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, p->h=1, t={20:0}] [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() VAL [a={14:0}, malloc(sizeof(struct node))={14:0}, malloc(sizeof(struct node))={20:0}, p={14:0}, t={20:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 56 locations, 1 error locations. UNSAFE Result, 0.7s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 91 SDtfs, 39 SDslu, 75 SDs, 0 SdLazy, 54 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 5867 SizeOfPredicates, 7 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...