./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 997512b29ff7fdf1190aebf9d039045a1841d533 ............................................................................................................................................................................................................................................................... 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 0.2.0-69874e2 [2020-12-01 17:46:04,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 17:46:04,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 17:46:04,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 17:46:04,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 17:46:04,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 17:46:04,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 17:46:04,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 17:46:04,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 17:46:04,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 17:46:04,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 17:46:04,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 17:46:04,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 17:46:04,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 17:46:04,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 17:46:04,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 17:46:04,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 17:46:04,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 17:46:04,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 17:46:04,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 17:46:04,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 17:46:04,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 17:46:04,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 17:46:04,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 17:46:04,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 17:46:04,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 17:46:04,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 17:46:04,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 17:46:04,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 17:46:04,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 17:46:04,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 17:46:04,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 17:46:04,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 17:46:04,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 17:46:04,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 17:46:04,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 17:46:04,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 17:46:04,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 17:46:04,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 17:46:04,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 17:46:04,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 17:46:04,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-12-01 17:46:04,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 17:46:04,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 17:46:04,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-01 17:46:04,899 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-12-01 17:46:04,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 17:46:04,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 17:46:04,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 17:46:04,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 17:46:04,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 17:46:04,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 17:46:04,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 17:46:04,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 17:46:04,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 17:46:04,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 17:46:04,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 17:46:04,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 17:46:04,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 17:46:04,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 17:46:04,907 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-12-01 17:46:04,908 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-12-01 17:46:04,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 17:46:04,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 17:46:04,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 17:46:04,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 17:46:04,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 17:46:04,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 17:46:04,911 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-12-01 17:46:04,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 17:46:04,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 17:46:04,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 997512b29ff7fdf1190aebf9d039045a1841d533 [2020-12-01 17:46:05,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 17:46:05,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 17:46:05,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 17:46:05,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 17:46:05,262 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 17:46:05,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-12-01 17:46:05,364 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/data/4ee2745fb/6be8068777f04bd8afe4a2744e7a8d2c/FLAG11049cde7 [2020-12-01 17:46:06,000 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 17:46:06,001 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-12-01 17:46:06,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/data/4ee2745fb/6be8068777f04bd8afe4a2744e7a8d2c/FLAG11049cde7 [2020-12-01 17:46:06,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/data/4ee2745fb/6be8068777f04bd8afe4a2744e7a8d2c [2020-12-01 17:46:06,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 17:46:06,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 17:46:06,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 17:46:06,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 17:46:06,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 17:46:06,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:46:06" (1/1) ... [2020-12-01 17:46:06,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ec9ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:06, skipping insertion in model container [2020-12-01 17:46:06,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 05:46:06" (1/1) ... [2020-12-01 17:46:06,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 17:46:06,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 17:46:06,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 17:46:06,865 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 17:46:06,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 17:46:07,019 INFO L208 MainTranslator]: Completed translation [2020-12-01 17:46:07,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07 WrapperNode [2020-12-01 17:46:07,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 17:46:07,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 17:46:07,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 17:46:07,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 17:46:07,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 17:46:07,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 17:46:07,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 17:46:07,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 17:46:07,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... [2020-12-01 17:46:07,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 17:46:07,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 17:46:07,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 17:46:07,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 17:46:07,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 05:46:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2020-12-01 17:46:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-12-01 17:46:07,299 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-12-01 17:46:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 17:46:07,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 17:46:07,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-01 17:46:07,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-01 17:46:07,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 17:46:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-01 17:46:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 17:46:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 17:46:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 17:46:07,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 17:46:07,521 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-12-01 17:46:08,445 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 17:46:08,446 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-01 17:46:08,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:46:08 BoogieIcfgContainer [2020-12-01 17:46:08,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 17:46:08,450 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-12-01 17:46:08,450 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-12-01 17:46:08,465 INFO L275 PluginConnector]: CodeCheck initialized [2020-12-01 17:46:08,465 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:46:08" (1/1) ... [2020-12-01 17:46:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 17:46:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:46:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 32 states and 46 transitions. [2020-12-01 17:46:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2020-12-01 17:46:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 17:46:08,551 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:46:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:46:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 17:46:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:46:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 31 states and 42 transitions. [2020-12-01 17:46:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-01 17:46:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 17:46:08,800 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:46:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:46:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 17:46:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:46:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 36 states and 51 transitions. [2020-12-01 17:46:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2020-12-01 17:46:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 17:46:09,181 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:46:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 17:46:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 17:46:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 17:46:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 43 states and 66 transitions. [2020-12-01 17:46:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-12-01 17:46:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-01 17:46:10,307 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 17:46:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:46:10,341 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:46:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:46:10,370 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:46:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:46:10,452 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:46:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 17:46:10,492 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 17:46:10,644 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2020-12-01 17:46:10,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 05:46:10 ImpRootNode [2020-12-01 17:46:10,689 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-12-01 17:46:10,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 17:46:10,691 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 17:46:10,691 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 17:46:10,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 05:46:08" (3/4) ... [2020-12-01 17:46:10,694 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 17:46:10,753 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e03327f8-9752-40c1-86c6-0eb916c8c201/bin/ukojak/witness.graphml [2020-12-01 17:46:10,753 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 17:46:10,756 INFO L168 Benchmark]: Toolchain (without parser) took 4423.46 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 55.7 MB in the beginning and 43.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,757 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 88.1 MB. Free memory was 46.0 MB in the beginning and 46.0 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 17:46:10,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 688.79 ms. Allocated memory is still 88.1 MB. Free memory was 55.5 MB in the beginning and 51.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,759 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.88 ms. Allocated memory is still 88.1 MB. Free memory was 51.5 MB in the beginning and 49.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,760 INFO L168 Benchmark]: Boogie Preprocessor took 76.45 ms. Allocated memory is still 88.1 MB. Free memory was 49.3 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,762 INFO L168 Benchmark]: RCFGBuilder took 1259.42 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 47.2 MB in the beginning and 86.8 MB in the end (delta: -39.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,763 INFO L168 Benchmark]: CodeCheck took 2239.46 ms. Allocated memory is still 111.1 MB. Free memory was 86.8 MB in the beginning and 45.9 MB in the end (delta: 41.0 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,763 INFO L168 Benchmark]: Witness Printer took 63.78 ms. Allocated memory is still 111.1 MB. Free memory was 45.9 MB in the beginning and 43.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 17:46:10,768 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 36 SDslu, 32 SDs, 0 SdLazy, 170 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 240 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 1723 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] a->h = 2 [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) [L604] COND FALSE !(t == 0) [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a [L611] COND TRUE p!=0 [L612] EXPR p->h [L612] COND TRUE p->h != 2 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "simple_and_skiplist_2lvl-1.c", 3, __extension__ __PRETTY_FUNCTION__) * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 88.1 MB. Free memory was 46.0 MB in the beginning and 46.0 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 688.79 ms. Allocated memory is still 88.1 MB. Free memory was 55.5 MB in the beginning and 51.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.88 ms. Allocated memory is still 88.1 MB. Free memory was 51.5 MB in the beginning and 49.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.45 ms. Allocated memory is still 88.1 MB. Free memory was 49.3 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1259.42 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 47.2 MB in the beginning and 86.8 MB in the end (delta: -39.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * CodeCheck took 2239.46 ms. Allocated memory is still 111.1 MB. Free memory was 86.8 MB in the beginning and 45.9 MB in the end (delta: 41.0 MB). Peak memory consumption was 40.0 MB. Max. memory is 16.1 GB. * Witness Printer took 63.78 ms. Allocated memory is still 111.1 MB. Free memory was 45.9 MB in the beginning and 43.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...