./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/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_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/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-a4ecdab [2020-11-28 04:42:56,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 04:42:56,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 04:42:56,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 04:42:56,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 04:42:56,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 04:42:56,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 04:42:56,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 04:42:56,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 04:42:56,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 04:42:56,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 04:42:56,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 04:42:56,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 04:42:56,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 04:42:56,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 04:42:56,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 04:42:56,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 04:42:56,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 04:42:56,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 04:42:56,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 04:42:56,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 04:42:56,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 04:42:56,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 04:42:56,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 04:42:56,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 04:42:56,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 04:42:56,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 04:42:56,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 04:42:56,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 04:42:56,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 04:42:56,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 04:42:56,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 04:42:56,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 04:42:56,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 04:42:56,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 04:42:56,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 04:42:56,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 04:42:56,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 04:42:56,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 04:42:56,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 04:42:56,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 04:42:56,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-28 04:42:56,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 04:42:56,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 04:42:56,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 04:42:56,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-28 04:42:56,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 04:42:56,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 04:42:56,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 04:42:56,270 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 04:42:56,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 04:42:56,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 04:42:56,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 04:42:56,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 04:42:56,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 04:42:56,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 04:42:56,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 04:42:56,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 04:42:56,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 04:42:56,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 04:42:56,274 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-28 04:42:56,274 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-28 04:42:56,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 04:42:56,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 04:42:56,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:42:56,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 04:42:56,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 04:42:56,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 04:42:56,276 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-28 04:42:56,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 04:42:56,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 04:42:56,279 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_067e5914-13fd-4bbf-8461-b58b69cf3f95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 997512b29ff7fdf1190aebf9d039045a1841d533 [2020-11-28 04:42:56,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 04:42:56,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 04:42:56,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 04:42:56,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 04:42:56,645 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 04:42:56,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-11-28 04:42:56,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/data/f1b4ae1ac/0d0ddb8cb0b14e44893975697b97e8cd/FLAG39d2771d6 [2020-11-28 04:42:57,271 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 04:42:57,272 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-11-28 04:42:57,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/data/f1b4ae1ac/0d0ddb8cb0b14e44893975697b97e8cd/FLAG39d2771d6 [2020-11-28 04:42:57,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/data/f1b4ae1ac/0d0ddb8cb0b14e44893975697b97e8cd [2020-11-28 04:42:57,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 04:42:57,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 04:42:57,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 04:42:57,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 04:42:57,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 04:42:57,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:42:57" (1/1) ... [2020-11-28 04:42:57,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d66d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:57, skipping insertion in model container [2020-11-28 04:42:57,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:42:57" (1/1) ... [2020-11-28 04:42:57,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 04:42:57,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 04:42:57,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:42:57,971 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 04:42:58,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:42:58,108 INFO L208 MainTranslator]: Completed translation [2020-11-28 04:42:58,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58 WrapperNode [2020-11-28 04:42:58,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 04:42:58,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 04:42:58,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 04:42:58,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 04:42:58,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 04:42:58,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 04:42:58,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 04:42:58,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 04:42:58,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... [2020-11-28 04:42:58,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 04:42:58,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 04:42:58,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 04:42:58,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 04:42:58,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:42:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/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 [2020-11-28 04:42:58,338 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-28 04:42:58,339 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-28 04:42:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 04:42:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 04:42:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 04:42:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 04:42:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 04:42:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 04:42:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 04:42:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 04:42:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 04:42:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 04:42:58,549 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-28 04:42:59,247 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 04:42:59,247 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-28 04:42:59,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:42:59 BoogieIcfgContainer [2020-11-28 04:42:59,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 04:42:59,250 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-28 04:42:59,251 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-28 04:42:59,259 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-28 04:42:59,259 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:42:59" (1/1) ... [2020-11-28 04:42:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 04:42:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:42:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 32 states and 46 transitions. [2020-11-28 04:42:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2020-11-28 04:42:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 04:42:59,304 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:42:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:42:59,426 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 04:42:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:42:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 31 states and 42 transitions. [2020-11-28 04:42:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-28 04:42:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 04:42:59,435 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:42:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:42:59,544 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 04:42:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:42:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 36 states and 51 transitions. [2020-11-28 04:42:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2020-11-28 04:42:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 04:42:59,713 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:42:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:42:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 04:43:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:43:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 43 states and 66 transitions. [2020-11-28 04:43:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 66 transitions. [2020-11-28 04:43:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 04:43:00,779 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:43:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,918 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:43:00,954 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:43:00,976 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2020-11-28 04:43:01,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 28.11 04:43:01 ImpRootNode [2020-11-28 04:43:01,001 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-28 04:43:01,001 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 04:43:01,002 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 04:43:01,002 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 04:43:01,002 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:42:59" (3/4) ... [2020-11-28 04:43:01,004 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 04:43:01,052 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_067e5914-13fd-4bbf-8461-b58b69cf3f95/bin/ukojak/witness.graphml [2020-11-28 04:43:01,052 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 04:43:01,054 INFO L168 Benchmark]: Toolchain (without parser) took 3445.22 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 67.1 MB in the beginning and 78.3 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,055 INFO L168 Benchmark]: CDTParser took 2.28 ms. Allocated memory is still 75.5 MB. Free memory was 48.9 MB in the beginning and 48.9 MB in the end (delta: 24.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:43:01,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.54 ms. Allocated memory is still 98.6 MB. Free memory was 66.8 MB in the beginning and 63.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.42 ms. Allocated memory is still 98.6 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,058 INFO L168 Benchmark]: Boogie Preprocessor took 56.80 ms. Allocated memory is still 98.6 MB. Free memory was 61.2 MB in the beginning and 59.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,059 INFO L168 Benchmark]: RCFGBuilder took 998.61 ms. Allocated memory is still 98.6 MB. Free memory was 59.1 MB in the beginning and 50.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,060 INFO L168 Benchmark]: CodeCheck took 1750.59 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 49.7 MB in the beginning and 80.3 MB in the end (delta: -30.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:43:01,061 INFO L168 Benchmark]: Witness Printer took 50.57 ms. Allocated memory is still 119.5 MB. Free memory was 80.3 MB in the beginning and 78.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:43:01,066 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: 1.7s, 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, 0.2s 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 2.28 ms. Allocated memory is still 75.5 MB. Free memory was 48.9 MB in the beginning and 48.9 MB in the end (delta: 24.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 493.54 ms. Allocated memory is still 98.6 MB. Free memory was 66.8 MB in the beginning and 63.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.42 ms. Allocated memory is still 98.6 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.80 ms. Allocated memory is still 98.6 MB. Free memory was 61.2 MB in the beginning and 59.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 998.61 ms. Allocated memory is still 98.6 MB. Free memory was 59.1 MB in the beginning and 50.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. * CodeCheck took 1750.59 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 49.7 MB in the beginning and 80.3 MB in the end (delta: -30.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 50.57 ms. Allocated memory is still 119.5 MB. Free memory was 80.3 MB in the beginning and 78.3 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...