./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/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 0.1.24-6b5699a [2019-11-26 02:19:19,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:19:19,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:19:19,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:19:19,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:19:19,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:19:19,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:19:19,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:19:19,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:19:19,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:19:19,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:19:19,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:19:19,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:19:19,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:19:19,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:19:19,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:19:19,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:19:19,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:19:19,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:19:19,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:19:19,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:19:19,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:19:19,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:19:19,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:19:19,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:19:19,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:19:19,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:19:19,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:19:19,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:19:19,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:19:19,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:19:19,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:19:19,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:19:19,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:19:19,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:19:19,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:19:19,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:19:19,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:19:19,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:19:19,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:19:19,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:19:19,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:19:19,343 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:19:19,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:19:19,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:19:19,344 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:19:19,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:19:19,345 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:19:19,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:19:19,345 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:19:19,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:19:19,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:19:19,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:19:19,346 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:19:19,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:19:19,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:19:19,346 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:19:19,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:19:19,347 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:19:19,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:19:19,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:19:19,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:19:19,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:19:19,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:19:19,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:19:19,349 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:19:19,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:19:19,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:19:19,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:19:19,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:19:19,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:19:19,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:19:19,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:19:19,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:19:19,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:19:19,351 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:19:19,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:19:19,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:19:19,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:19:19,352 INFO L138 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/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/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 [2019-11-26 02:19:19,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:19:19,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:19:19,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:19:19,509 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:19:19,509 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:19:19,510 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-11-26 02:19:19,561 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/data/e68938455/29891ddc450a4060bccfbddd22a45646/FLAG6c4573cce [2019-11-26 02:19:20,030 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:19:20,031 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-11-26 02:19:20,054 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/data/e68938455/29891ddc450a4060bccfbddd22a45646/FLAG6c4573cce [2019-11-26 02:19:20,066 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/data/e68938455/29891ddc450a4060bccfbddd22a45646 [2019-11-26 02:19:20,069 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:19:20,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:19:20,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:19:20,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:19:20,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:19:20,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@162dbf6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20, skipping insertion in model container [2019-11-26 02:19:20,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:19:20,138 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:19:20,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:20,553 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:19:20,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:20,645 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:19:20,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20 WrapperNode [2019-11-26 02:19:20,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:19:20,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:19:20,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:19:20,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:19:20,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:19:20,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:19:20,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:19:20,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:19:20,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... [2019-11-26 02:19:20,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:19:20,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:19:20,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:19:20,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:19:20,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/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 [2019-11-26 02:19:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:19:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:19:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:19:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:19:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:19:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:19:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:19:20,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:19:21,525 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:19:21,525 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-26 02:19:21,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:21 BoogieIcfgContainer [2019-11-26 02:19:21,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:19:21,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:19:21,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:19:21,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:19:21,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:19:20" (1/3) ... [2019-11-26 02:19:21,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415a8796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:19:21, skipping insertion in model container [2019-11-26 02:19:21,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:20" (2/3) ... [2019-11-26 02:19:21,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@415a8796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:19:21, skipping insertion in model container [2019-11-26 02:19:21,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:21" (3/3) ... [2019-11-26 02:19:21,534 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2019-11-26 02:19:21,541 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:19:21,546 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:19:21,554 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:19:21,575 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:19:21,575 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:19:21,575 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:19:21,575 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:19:21,575 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:19:21,575 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:19:21,576 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:19:21,576 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:19:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-26 02:19:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:19:21,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:21,592 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:21,593 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:19:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:21,598 INFO L82 PathProgramCache]: Analyzing trace with hash 293584007, now seen corresponding path program 1 times [2019-11-26 02:19:21,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:19:21,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778083452] [2019-11-26 02:19:21,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:19:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:21,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778083452] [2019-11-26 02:19:21,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:21,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:19:21,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822778232] [2019-11-26 02:19:21,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 02:19:21,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:19:21,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 02:19:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:19:21,725 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-26 02:19:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:21,739 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-26 02:19:21,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 02:19:21,740 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-26 02:19:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:21,746 INFO L225 Difference]: With dead ends: 45 [2019-11-26 02:19:21,746 INFO L226 Difference]: Without dead ends: 11 [2019-11-26 02:19:21,749 INFO L630 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 [2019-11-26 02:19:21,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-26 02:19:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-26 02:19:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-26 02:19:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-26 02:19:21,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-11-26 02:19:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:21,772 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-26 02:19:21,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 02:19:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-26 02:19:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:19:21,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:21,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:21,773 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:19:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash 68532048, now seen corresponding path program 1 times [2019-11-26 02:19:21,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:19:21,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362813122] [2019-11-26 02:19:21,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:19:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:21,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362813122] [2019-11-26 02:19:21,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:21,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:19:21,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090392870] [2019-11-26 02:19:21,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:19:21,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:19:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:19:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:21,882 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2019-11-26 02:19:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:21,982 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-26 02:19:21,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:19:21,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-26 02:19:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:21,983 INFO L225 Difference]: With dead ends: 25 [2019-11-26 02:19:21,984 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:19:21,984 INFO L630 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 [2019-11-26 02:19:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:19:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-11-26 02:19:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-26 02:19:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-26 02:19:21,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2019-11-26 02:19:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:21,988 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-26 02:19:21,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:19:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-26 02:19:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:19:21,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:21,989 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:21,990 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:19:21,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1533583739, now seen corresponding path program 1 times [2019-11-26 02:19:21,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:19:21,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023720811] [2019-11-26 02:19:21,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:19:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:22,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023720811] [2019-11-26 02:19:22,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337522543] [2019-11-26 02:19:22,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:22,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-26 02:19:22,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:22,341 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-26 02:19:22,342 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:22,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:22,354 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2019-11-26 02:19:22,355 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:22,365 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:22,365 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:22,365 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-26 02:19:22,390 INFO L377 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 7 [2019-11-26 02:19:22,391 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:22,398 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:22,401 INFO L377 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 7 [2019-11-26 02:19:22,402 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:22,407 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:22,407 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:22,407 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-26 02:19:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:22,409 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:22,446 INFO L377 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 35 treesize of output 29 [2019-11-26 02:19:22,449 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-26 02:19:22,460 INFO L567 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2019-11-26 02:19:22,461 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.offset_59| vanished before elimination [2019-11-26 02:19:22,461 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-26 02:19:22,461 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2019-11-26 02:19:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:22,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465996721] [2019-11-26 02:19:22,496 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-26 02:19:22,496 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:19:22,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:19:22,512 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:19:22,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:19:22,623 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:19:22,856 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:19:23,488 WARN L192 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-11-26 02:19:23,723 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2019-11-26 02:19:23,935 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-26 02:19:23,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:19:23,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 14 [2019-11-26 02:19:23,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492943895] [2019-11-26 02:19:23,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:19:23,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:19:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:19:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:19:23,939 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-26 02:19:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:24,025 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-26 02:19:24,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:19:24,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-26 02:19:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:24,026 INFO L225 Difference]: With dead ends: 21 [2019-11-26 02:19:24,026 INFO L226 Difference]: Without dead ends: 13 [2019-11-26 02:19:24,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:19:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-26 02:19:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-26 02:19:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-26 02:19:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-26 02:19:24,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2019-11-26 02:19:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:24,030 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-26 02:19:24,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:19:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-26 02:19:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:19:24,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:24,031 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:24,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:24,232 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:19:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1454352152, now seen corresponding path program 1 times [2019-11-26 02:19:24,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:19:24,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587891341] [2019-11-26 02:19:24,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:19:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:19:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:19:24,315 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:19:24,316 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:19:24,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:19:24 BoogieIcfgContainer [2019-11-26 02:19:24,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:19:24,340 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:19:24,340 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:19:24,341 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:19:24,341 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:21" (3/4) ... [2019-11-26 02:19:24,343 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:19:24,389 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b910ea6d-cc2d-4d8e-8533-99b761b5a3a8/bin/utaipan/witness.graphml [2019-11-26 02:19:24,389 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:19:24,390 INFO L168 Benchmark]: Toolchain (without parser) took 4320.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -86.0 MB). Peak memory consumption was 55.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:24,391 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:19:24,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 575.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -174.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:24,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.14 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:24,392 INFO L168 Benchmark]: Boogie Preprocessor took 43.21 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. [2019-11-26 02:19:24,393 INFO L168 Benchmark]: RCFGBuilder took 787.38 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: 55.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:24,393 INFO L168 Benchmark]: TraceAbstraction took 2813.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:24,394 INFO L168 Benchmark]: Witness Printer took 48.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:24,396 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 575.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -174.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 48.14 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.21 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. * RCFGBuilder took 787.38 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: 55.9 MB). Peak memory consumption was 55.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2813.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. * Witness Printer took 48.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. 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)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 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 [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 26 SDslu, 27 SDs, 0 SdLazy, 56 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 3307 SizeOfPredicates, 7 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 360, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME[ms]: 234, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 14, TOOLS_QUANTIFIERELIM_TIME[ms]: 228, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 101, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 28, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 36, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 8, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 21, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 59, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 59, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 12, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 68, DAG_COMPRESSION_RETAINED_NODES: 28, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...