./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-optional-2.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_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/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 9782fe34c3bae6ab09bbe7588de1b0d436c1fccc .................................................................................................................................................................................................................................................................................... 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 02:50:07,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:50:07,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:50:07,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:50:07,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:50:07,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:50:07,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:50:07,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:50:07,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:50:07,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:50:07,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:50:07,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:50:07,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:50:07,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:50:07,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:50:07,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:50:07,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:50:07,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:50:07,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:50:07,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:50:07,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:50:07,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:50:07,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:50:07,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:50:07,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:50:07,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:50:07,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:50:07,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:50:07,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:50:07,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:50:07,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:50:07,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:50:07,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:50:07,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:50:07,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:50:07,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:50:07,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:50:07,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:50:07,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:50:07,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:50:07,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:50:07,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:50:07,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:50:07,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:50:07,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:50:07,953 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:50:07,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:50:07,954 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:50:07,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:50:07,954 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:50:07,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:50:07,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:50:07,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:50:07,955 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:50:07,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:50:07,955 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:50:07,955 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:50:07,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:50:07,956 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:50:07,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:50:07,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:50:07,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:50:07,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:50:07,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:50:07,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:50:07,957 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:50:07,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:50:07,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:50:07,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:50:07,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:50:07,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:50:07,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:50:07,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:50:07,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:50:07,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:50:07,959 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:50:07,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:50:07,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:50:07,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:50:07,960 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_dadb1334-510d-472b-9b37-148248cf7612/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 -> 9782fe34c3bae6ab09bbe7588de1b0d436c1fccc [2019-11-26 02:50:08,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:50:08,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:50:08,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:50:08,153 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:50:08,154 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:50:08,154 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/../../sv-benchmarks/c/forester-heap/sll-optional-2.i [2019-11-26 02:50:08,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/data/74898311b/7e791f5847b843aabcaacb4fccef3eec/FLAGdd5ab630c [2019-11-26 02:50:08,646 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:50:08,650 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/sv-benchmarks/c/forester-heap/sll-optional-2.i [2019-11-26 02:50:08,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/data/74898311b/7e791f5847b843aabcaacb4fccef3eec/FLAGdd5ab630c [2019-11-26 02:50:09,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/data/74898311b/7e791f5847b843aabcaacb4fccef3eec [2019-11-26 02:50:09,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:50:09,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:50:09,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:09,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:50:09,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:50:09,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd9047c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09, skipping insertion in model container [2019-11-26 02:50:09,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:50:09,067 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:50:09,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:09,466 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:50:09,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:50:09,560 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:50:09,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09 WrapperNode [2019-11-26 02:50:09,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:50:09,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:09,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:50:09,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:50:09,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:50:09,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:50:09,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:50:09,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:50:09,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... [2019-11-26 02:50:09,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:50:09,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:50:09,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:50:09,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:50:09,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/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 02:50:09,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:50:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:50:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:50:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:50:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:50:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:50:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:50:09,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:50:10,910 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:50:10,911 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-26 02:50:10,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:10 BoogieIcfgContainer [2019-11-26 02:50:10,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:50:10,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:50:10,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:50:10,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:50:10,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:50:09" (1/3) ... [2019-11-26 02:50:10,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1402fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:10, skipping insertion in model container [2019-11-26 02:50:10,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:50:09" (2/3) ... [2019-11-26 02:50:10,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1402fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:50:10, skipping insertion in model container [2019-11-26 02:50:10,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:10" (3/3) ... [2019-11-26 02:50:10,919 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-optional-2.i [2019-11-26 02:50:10,927 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:50:10,931 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:50:10,940 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:50:10,959 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:50:10,959 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:50:10,959 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:50:10,959 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:50:10,960 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:50:10,960 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:50:10,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:50:10,960 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:50:10,972 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-26 02:50:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:50:10,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:10,977 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:10,978 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1965906075, now seen corresponding path program 1 times [2019-11-26 02:50:10,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:50:10,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140204787] [2019-11-26 02:50:10,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:50:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:50:11,136 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 02:50:11,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140204787] [2019-11-26 02:50:11,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:50:11,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:50:11,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65567348] [2019-11-26 02:50:11,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 02:50:11,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:50:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 02:50:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:50:11,158 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2019-11-26 02:50:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:50:11,172 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2019-11-26 02:50:11,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 02:50:11,174 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-26 02:50:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:50:11,182 INFO L225 Difference]: With dead ends: 23 [2019-11-26 02:50:11,182 INFO L226 Difference]: Without dead ends: 11 [2019-11-26 02:50:11,184 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 02:50:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-26 02:50:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-26 02:50:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-26 02:50:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-26 02:50:11,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2019-11-26 02:50:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:50:11,210 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-26 02:50:11,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 02:50:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-26 02:50:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:50:11,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:50:11,211 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:50:11,211 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:50:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:50:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1521455439, now seen corresponding path program 1 times [2019-11-26 02:50:11,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:50:11,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268330752] [2019-11-26 02:50:11,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:50:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:50:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:50:11,420 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:50:11,420 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:50:11,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:50:11 BoogieIcfgContainer [2019-11-26 02:50:11,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:50:11,442 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:50:11,442 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:50:11,442 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:50:11,442 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:50:10" (3/4) ... [2019-11-26 02:50:11,444 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:50:11,481 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dadb1334-510d-472b-9b37-148248cf7612/bin/utaipan/witness.graphml [2019-11-26 02:50:11,481 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:50:11,483 INFO L168 Benchmark]: Toolchain (without parser) took 2476.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -70.6 MB). Peak memory consumption was 65.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:11,484 INFO L168 Benchmark]: CDTParser took 0.17 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 02:50:11,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:11,485 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.40 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:11,486 INFO L168 Benchmark]: Boogie Preprocessor took 29.11 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 02:50:11,486 INFO L168 Benchmark]: RCFGBuilder took 1264.85 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: 62.5 MB). Peak memory consumption was 62.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:11,487 INFO L168 Benchmark]: TraceAbstraction took 528.31 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: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:50:11,487 INFO L168 Benchmark]: Witness Printer took 39.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:50:11,491 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 554.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 56.40 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.11 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 1264.85 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: 62.5 MB). Peak memory consumption was 62.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 528.31 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: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 11.5 GB. * Witness Printer took 39.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 996]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = ((void*)0) [L987] COND FALSE !(__VERIFIER_nondet_int()) [L987] COND FALSE !(__VERIFIER_nondet_int()) [L987] head->data = 0 [L987] head->opt = head [L988] SLL* x = head; [L990] COND FALSE !(__VERIFIER_nondet_int()) [L993] x = head [L994] COND TRUE x != ((void*)0) [L996] EXPR x->data [L996] EXPR x->data == 2 && x->opt == x [L996] COND TRUE !(x->data == 2 && x->opt == x) [L996] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...