./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-token-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d66a07d2a90ded112831066684eab385c0c1369 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:02:32,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:02:32,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:02:32,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:02:32,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:02:32,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:02:32,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:02:32,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:02:32,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:02:32,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:02:32,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:02:32,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:02:32,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:02:32,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:02:32,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:02:32,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:02:32,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:02:32,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:02:32,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:02:32,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:02:32,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:02:32,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:02:32,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:02:32,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:02:32,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:02:32,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:02:32,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:02:32,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:02:32,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:02:32,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:02:32,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:02:32,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:02:32,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:02:32,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:02:32,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:02:32,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:02:32,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:02:32,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:02:32,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:02:32,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:02:32,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:02:32,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:02:32,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:02:32,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:02:32,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:02:32,948 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:02:32,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:02:32,949 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:02:32,949 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:02:32,949 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:02:32,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:02:32,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:02:32,951 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:02:32,951 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:02:32,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:02:32,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:02:32,952 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:02:32,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:02:32,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:02:32,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:02:32,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:02:32,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:02:32,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:02:32,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:02:32,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:02:32,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:02:32,954 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:02:32,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:02:32,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:02:32,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:02:32,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:02:32,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:02:32,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:02:32,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:02:32,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:02:32,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:02:32,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:02:32,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:02:32,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:02:32,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:02:32,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:02:32,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:02:32,959 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d66a07d2a90ded112831066684eab385c0c1369 [2020-11-22 13:02:33,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:02:33,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:02:33,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:02:33,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:02:33,268 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:02:33,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/../../sv-benchmarks/c/forester-heap/dll-token-2.i [2020-11-22 13:02:33,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/data/1d99d1b78/ba6dc9ed69194575bad53e8d55166845/FLAGd20b197e0 [2020-11-22 13:02:33,836 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:02:33,837 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/sv-benchmarks/c/forester-heap/dll-token-2.i [2020-11-22 13:02:33,862 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/data/1d99d1b78/ba6dc9ed69194575bad53e8d55166845/FLAGd20b197e0 [2020-11-22 13:02:34,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/data/1d99d1b78/ba6dc9ed69194575bad53e8d55166845 [2020-11-22 13:02:34,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:02:34,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:02:34,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:02:34,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:02:34,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:02:34,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f78fa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34, skipping insertion in model container [2020-11-22 13:02:34,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:02:34,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:02:34,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:02:34,611 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:02:34,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:02:34,713 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:02:34,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34 WrapperNode [2020-11-22 13:02:34,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:02:34,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:02:34,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:02:34,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:02:34,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:02:34,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:02:34,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:02:34,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:02:34,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... [2020-11-22 13:02:34,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:02:34,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:02:34,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:02:34,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:02:34,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/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 [2020-11-22 13:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:02:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 13:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 13:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:02:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:02:34,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:02:35,501 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:02:35,502 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-22 13:02:35,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:35 BoogieIcfgContainer [2020-11-22 13:02:35,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:02:35,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:02:35,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:02:35,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:02:35,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:02:34" (1/3) ... [2020-11-22 13:02:35,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48396a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:02:35, skipping insertion in model container [2020-11-22 13:02:35,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:02:34" (2/3) ... [2020-11-22 13:02:35,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48396a56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:02:35, skipping insertion in model container [2020-11-22 13:02:35,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:35" (3/3) ... [2020-11-22 13:02:35,513 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-11-22 13:02:35,524 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:02:35,528 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-22 13:02:35,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-22 13:02:35,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:02:35,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:02:35,563 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:02:35,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:02:35,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:02:35,564 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:02:35,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:02:35,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:02:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-11-22 13:02:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:02:35,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:35,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:02:35,584 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:35,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1910685978, now seen corresponding path program 1 times [2020-11-22 13:02:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:35,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949945493] [2020-11-22 13:02:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:35,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949945493] [2020-11-22 13:02:35,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:35,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:02:35,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921634582] [2020-11-22 13:02:35,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:02:35,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:02:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:02:35,763 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2020-11-22 13:02:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:35,784 INFO L93 Difference]: Finished difference Result 99 states and 157 transitions. [2020-11-22 13:02:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:02:35,785 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-22 13:02:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:35,794 INFO L225 Difference]: With dead ends: 99 [2020-11-22 13:02:35,794 INFO L226 Difference]: Without dead ends: 44 [2020-11-22 13:02:35,797 INFO L677 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 [2020-11-22 13:02:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-22 13:02:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-22 13:02:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-22 13:02:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-11-22 13:02:35,831 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2020-11-22 13:02:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:35,832 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-11-22 13:02:35,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:02:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-11-22 13:02:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:02:35,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:35,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:02:35,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:02:35,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:35,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1941131386, now seen corresponding path program 1 times [2020-11-22 13:02:35,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:35,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754483036] [2020-11-22 13:02:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:35,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754483036] [2020-11-22 13:02:35,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:35,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:02:35,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878520769] [2020-11-22 13:02:35,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:02:35,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:35,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:02:35,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:02:35,971 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 4 states. [2020-11-22 13:02:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:36,111 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-22 13:02:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:02:36,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:02:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:36,113 INFO L225 Difference]: With dead ends: 44 [2020-11-22 13:02:36,113 INFO L226 Difference]: Without dead ends: 41 [2020-11-22 13:02:36,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-22 13:02:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-22 13:02:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-22 13:02:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-22 13:02:36,120 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 6 [2020-11-22 13:02:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:36,120 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-22 13:02:36,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:02:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-22 13:02:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:02:36,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:36,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:36,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:02:36,122 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:36,126 INFO L82 PathProgramCache]: Analyzing trace with hash -46668686, now seen corresponding path program 1 times [2020-11-22 13:02:36,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:36,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298091917] [2020-11-22 13:02:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:36,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298091917] [2020-11-22 13:02:36,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:36,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:02:36,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773456194] [2020-11-22 13:02:36,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:02:36,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:02:36,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:02:36,245 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-11-22 13:02:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:36,339 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-11-22 13:02:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:02:36,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:02:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:36,341 INFO L225 Difference]: With dead ends: 71 [2020-11-22 13:02:36,341 INFO L226 Difference]: Without dead ends: 68 [2020-11-22 13:02:36,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-22 13:02:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2020-11-22 13:02:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-22 13:02:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-11-22 13:02:36,354 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 7 [2020-11-22 13:02:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:36,354 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-11-22 13:02:36,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:02:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-11-22 13:02:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:02:36,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:36,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:36,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:02:36,356 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash 696528521, now seen corresponding path program 1 times [2020-11-22 13:02:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:36,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860433776] [2020-11-22 13:02:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:36,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860433776] [2020-11-22 13:02:36,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:36,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:02:36,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920692909] [2020-11-22 13:02:36,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:36,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:36,452 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2020-11-22 13:02:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:36,550 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-22 13:02:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:36,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-22 13:02:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:36,552 INFO L225 Difference]: With dead ends: 38 [2020-11-22 13:02:36,552 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 13:02:36,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:02:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 13:02:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-22 13:02:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 13:02:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-11-22 13:02:36,557 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 12 [2020-11-22 13:02:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:36,558 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-11-22 13:02:36,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-11-22 13:02:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:02:36,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:36,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:36,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:02:36,559 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash 697482827, now seen corresponding path program 1 times [2020-11-22 13:02:36,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:36,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437116475] [2020-11-22 13:02:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:02:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:02:36,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437116475] [2020-11-22 13:02:36,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:02:36,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:02:36,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7768415] [2020-11-22 13:02:36,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:02:36,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:02:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:02:36,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:02:36,733 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-11-22 13:02:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:02:36,885 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-11-22 13:02:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:02:36,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-22 13:02:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:02:36,888 INFO L225 Difference]: With dead ends: 73 [2020-11-22 13:02:36,888 INFO L226 Difference]: Without dead ends: 46 [2020-11-22 13:02:36,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:02:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-22 13:02:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-11-22 13:02:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-22 13:02:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-22 13:02:36,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 12 [2020-11-22 13:02:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:02:36,905 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-22 13:02:36,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:02:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-22 13:02:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:02:36,907 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:02:36,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:02:36,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:02:36,909 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:02:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:02:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1354661092, now seen corresponding path program 1 times [2020-11-22 13:02:36,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:02:36,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977229314] [2020-11-22 13:02:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:02:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:02:36,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:02:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:02:36,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:02:37,003 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:02:37,003 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:02:37,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:02:37,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:02:37 BoogieIcfgContainer [2020-11-22 13:02:37,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:02:37,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:02:37,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:02:37,036 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:02:37,037 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:02:35" (3/4) ... [2020-11-22 13:02:37,038 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:02:37,082 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_65b42dc4-18af-433d-8241-a69985ab7768/bin/utaipan/witness.graphml [2020-11-22 13:02:37,082 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:02:37,084 INFO L168 Benchmark]: Toolchain (without parser) took 2923.59 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 49.0 MB in the beginning and 49.6 MB in the end (delta: -551.2 kB). Peak memory consumption was 20.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:37,085 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:02:37,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.05 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 48.7 MB in the beginning and 68.9 MB in the end (delta: -20.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:37,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.05 ms. Allocated memory is still 102.8 MB. Free memory was 68.9 MB in the beginning and 66.9 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:02:37,087 INFO L168 Benchmark]: Boogie Preprocessor took 33.93 ms. Allocated memory is still 102.8 MB. Free memory was 66.9 MB in the beginning and 65.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:37,088 INFO L168 Benchmark]: RCFGBuilder took 708.51 ms. Allocated memory is still 102.8 MB. Free memory was 65.1 MB in the beginning and 63.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:37,088 INFO L168 Benchmark]: TraceAbstraction took 1529.35 ms. Allocated memory is still 102.8 MB. Free memory was 63.0 MB in the beginning and 51.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:37,089 INFO L168 Benchmark]: Witness Printer took 46.59 ms. Allocated memory is still 102.8 MB. Free memory was 51.7 MB in the beginning and 49.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:02:37,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory was 40.6 MB in the beginning and 40.5 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 552.05 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 48.7 MB in the beginning and 68.9 MB in the end (delta: -20.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.05 ms. Allocated memory is still 102.8 MB. Free memory was 68.9 MB in the beginning and 66.9 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.93 ms. Allocated memory is still 102.8 MB. Free memory was 66.9 MB in the beginning and 65.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 708.51 ms. Allocated memory is still 102.8 MB. Free memory was 65.1 MB in the beginning and 63.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1529.35 ms. Allocated memory is still 102.8 MB. Free memory was 63.0 MB in the beginning and 51.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Witness Printer took 46.59 ms. Allocated memory is still 102.8 MB. Free memory was 51.7 MB in the beginning and 49.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1004] SLL* head = malloc(sizeof(SLL)); [L1005] head->next = ((void*)0) [L1006] head->prev = ((void*)0) [L1007] head->data = 0 [L1009] SLL* x = head; [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1021] x->data = 1 [L1022] x->next = malloc(sizeof(SLL)) [L1023] EXPR x->next [L1023] x->next->prev = x [L1024] EXPR x->next [L1024] x->next->data = 2 [L1026] x = head [L1028] COND FALSE !(!(((void*)0) != x)) [L1030] EXPR x->data [L1030] COND FALSE !(1 != x->data) [L1035] EXPR x->data [L1035] COND FALSE !(!(1 == x->data)) [L1036] EXPR x->next [L1036] x = x->next [L1037] EXPR x->data [L1037] COND TRUE !(2 != x->data) [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-token-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 178 SDtfs, 101 SDslu, 215 SDs, 0 SdLazy, 139 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred 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, 5 MinimizatonAttempts, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1533 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...