./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-circular-1.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_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/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 e585ced56eb20cb86f32939eb5fca0773c487edc ....................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:30:55,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:30:55,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:30:55,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:30:55,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:30:55,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:30:55,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:30:55,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:30:55,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:30:55,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:30:55,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:30:55,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:30:55,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:30:55,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:30:55,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:30:55,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:30:55,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:30:56,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:30:56,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:30:56,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:30:56,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:30:56,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:30:56,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:30:56,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:30:56,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:30:56,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:30:56,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:30:56,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:30:56,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:30:56,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:30:56,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:30:56,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:30:56,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:30:56,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:30:56,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:30:56,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:30:56,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:30:56,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:30:56,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:30:56,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:30:56,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:30:56,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:30:56,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:30:56,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:30:56,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:30:56,108 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:30:56,109 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:30:56,109 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:30:56,109 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:30:56,110 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:30:56,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:30:56,110 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:30:56,112 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:30:56,112 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:30:56,112 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:30:56,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:30:56,113 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:30:56,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:30:56,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:30:56,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:30:56,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:30:56,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:30:56,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:30:56,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:30:56,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:30:56,117 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:30:56,117 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:30:56,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:30:56,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:30:56,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:30:56,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:30:56,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:30:56,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:30:56,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:30:56,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:30:56,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:30:56,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:30:56,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:30:56,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:30:56,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:30:56,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:30:56,124 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:30:56,124 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_36a7b3ef-5ada-44d7-877d-dfd80f81577b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e585ced56eb20cb86f32939eb5fca0773c487edc [2020-11-28 07:30:56,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:30:56,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:30:56,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:30:56,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:30:56,484 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:30:56,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/../../sv-benchmarks/c/forester-heap/dll-circular-1.i [2020-11-28 07:30:56,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/data/e68c57bd5/733a784eead94071a005c61bb93d18d1/FLAGc91795cab [2020-11-28 07:30:57,147 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:30:57,148 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/sv-benchmarks/c/forester-heap/dll-circular-1.i [2020-11-28 07:30:57,167 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/data/e68c57bd5/733a784eead94071a005c61bb93d18d1/FLAGc91795cab [2020-11-28 07:30:57,448 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/data/e68c57bd5/733a784eead94071a005c61bb93d18d1 [2020-11-28 07:30:57,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:30:57,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:30:57,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:57,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:30:57,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:30:57,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:57" (1/1) ... [2020-11-28 07:30:57,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2beebb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:57, skipping insertion in model container [2020-11-28 07:30:57,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:57" (1/1) ... [2020-11-28 07:30:57,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:30:57,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:30:57,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:57,904 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:30:57,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:58,028 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:30:58,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58 WrapperNode [2020-11-28 07:30:58,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:58,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:58,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:30:58,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:30:58,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:58,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:30:58,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:30:58,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:30:58,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... [2020-11-28 07:30:58,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:30:58,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:30:58,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:30:58,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:30:58,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/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 [2020-11-28 07:30:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:30:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:30:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:30:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:30:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:30:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:30:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:30:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:30:58,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:30:58,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:30:58,884 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:30:58,884 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-28 07:30:58,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:58 BoogieIcfgContainer [2020-11-28 07:30:58,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:30:58,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:30:58,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:30:58,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:30:58,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:30:57" (1/3) ... [2020-11-28 07:30:58,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89d9f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:58, skipping insertion in model container [2020-11-28 07:30:58,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:58" (2/3) ... [2020-11-28 07:30:58,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89d9f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:58, skipping insertion in model container [2020-11-28 07:30:58,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:58" (3/3) ... [2020-11-28 07:30:58,895 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2020-11-28 07:30:58,906 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:30:58,910 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 07:30:58,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 07:30:58,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:30:58,956 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:30:58,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:30:58,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:30:58,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:30:58,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:30:58,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:30:58,957 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:30:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-28 07:30:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:30:58,976 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:58,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:30:58,977 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash 884113805, now seen corresponding path program 1 times [2020-11-28 07:30:58,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:58,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495506430] [2020-11-28 07:30:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495506430] [2020-11-28 07:30:59,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:59,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:30:59,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306353102] [2020-11-28 07:30:59,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:30:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:30:59,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:30:59,170 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-11-28 07:30:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:59,192 INFO L93 Difference]: Finished difference Result 66 states and 106 transitions. [2020-11-28 07:30:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:30:59,193 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 07:30:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:59,203 INFO L225 Difference]: With dead ends: 66 [2020-11-28 07:30:59,203 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 07:30:59,207 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 [2020-11-28 07:30:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 07:30:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 07:30:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 07:30:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-28 07:30:59,244 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2020-11-28 07:30:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:59,245 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-28 07:30:59,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:30:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-28 07:30:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:30:59,246 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:59,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:59,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:30:59,247 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:59,248 INFO L82 PathProgramCache]: Analyzing trace with hash 160830589, now seen corresponding path program 1 times [2020-11-28 07:30:59,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:59,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676730990] [2020-11-28 07:30:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:59,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676730990] [2020-11-28 07:30:59,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:59,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:30:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306716470] [2020-11-28 07:30:59,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:30:59,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:59,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:30:59,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:30:59,437 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2020-11-28 07:30:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:59,576 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-28 07:30:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:30:59,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:30:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:59,578 INFO L225 Difference]: With dead ends: 44 [2020-11-28 07:30:59,578 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 07:30:59,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:30:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 07:30:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-28 07:30:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 07:30:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-28 07:30:59,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 7 [2020-11-28 07:30:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:59,589 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-28 07:30:59,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:30:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-28 07:30:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:30:59,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:59,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:59,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:30:59,595 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash -119424093, now seen corresponding path program 1 times [2020-11-28 07:30:59,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:59,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871513563] [2020-11-28 07:30:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871513563] [2020-11-28 07:30:59,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:59,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:30:59,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070373756] [2020-11-28 07:30:59,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:30:59,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:30:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:30:59,707 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2020-11-28 07:30:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:59,751 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-11-28 07:30:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:30:59,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-28 07:30:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:59,755 INFO L225 Difference]: With dead ends: 73 [2020-11-28 07:30:59,755 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 07:30:59,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:30:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 07:30:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2020-11-28 07:30:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 07:30:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-11-28 07:30:59,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 10 [2020-11-28 07:30:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:59,766 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-11-28 07:30:59,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:30:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-11-28 07:30:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:30:59,767 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:59,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:59,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:30:59,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:30:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 611782753, now seen corresponding path program 1 times [2020-11-28 07:30:59,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:59,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294345741] [2020-11-28 07:30:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:30:59,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:30:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:30:59,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:30:59,917 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:30:59,918 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:30:59,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:30:59,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:30:59 BoogieIcfgContainer [2020-11-28 07:30:59,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:30:59,958 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:30:59,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:30:59,959 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:30:59,959 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:58" (3/4) ... [2020-11-28 07:30:59,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:31:00,029 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_36a7b3ef-5ada-44d7-877d-dfd80f81577b/bin/utaipan/witness.graphml [2020-11-28 07:31:00,029 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:31:00,031 INFO L168 Benchmark]: Toolchain (without parser) took 2577.73 ms. Allocated memory is still 98.6 MB. Free memory was 65.5 MB in the beginning and 63.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,032 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:31:00,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 575.33 ms. Allocated memory is still 98.6 MB. Free memory was 65.5 MB in the beginning and 64.5 MB in the end (delta: 985.8 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,034 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.15 ms. Allocated memory is still 98.6 MB. Free memory was 64.5 MB in the beginning and 62.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,034 INFO L168 Benchmark]: Boogie Preprocessor took 40.31 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 61.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,035 INFO L168 Benchmark]: RCFGBuilder took 748.15 ms. Allocated memory is still 98.6 MB. Free memory was 60.5 MB in the beginning and 73.2 MB in the end (delta: -12.6 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,036 INFO L168 Benchmark]: TraceAbstraction took 1069.62 ms. Allocated memory is still 98.6 MB. Free memory was 72.8 MB in the beginning and 66.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,036 INFO L168 Benchmark]: Witness Printer took 70.63 ms. Allocated memory is still 98.6 MB. Free memory was 66.0 MB in the beginning and 63.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:31:00,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 575.33 ms. Allocated memory is still 98.6 MB. Free memory was 65.5 MB in the beginning and 64.5 MB in the end (delta: 985.8 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.15 ms. Allocated memory is still 98.6 MB. Free memory was 64.5 MB in the beginning and 62.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.31 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 61.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 748.15 ms. Allocated memory is still 98.6 MB. Free memory was 60.5 MB in the beginning and 73.2 MB in the end (delta: -12.6 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1069.62 ms. Allocated memory is still 98.6 MB. Free memory was 72.8 MB in the beginning and 66.0 MB in the end (delta: 6.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Witness Printer took 70.63 ms. Allocated memory is still 98.6 MB. Free memory was 66.0 MB in the beginning and 63.7 MB in the end (delta: 2.3 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: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) [L1032] EXPR x->data [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-circular-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 43 SDslu, 48 SDs, 0 SdLazy, 32 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 25 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 538 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...