./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c783d9214012f4bff6327cd9f7b291047ddaff08 .............................................................................................................................................................................................................................................................................................. 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 [2020-11-29 18:46:27,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:46:27,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:46:27,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:46:27,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:46:27,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:46:27,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:46:27,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:46:27,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:46:27,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:46:27,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:46:27,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:46:27,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:46:27,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:46:27,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:46:27,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:46:27,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:46:27,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:46:27,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:46:27,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:46:27,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:46:27,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:46:27,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:46:27,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:46:27,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:46:27,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:46:27,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:46:27,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:46:27,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:46:27,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:46:27,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:46:27,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:46:27,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:46:27,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:46:27,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:46:27,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:46:27,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:46:27,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:46:27,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:46:27,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:46:27,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:46:27,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:46:27,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:46:27,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:46:27,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:46:27,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:46:27,420 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:46:27,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:46:27,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:46:27,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:46:27,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:46:27,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:46:27,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:46:27,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:46:27,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:46:27,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:46:27,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:46:27,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:46:27,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:46:27,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:46:27,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:46:27,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:46:27,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:46:27,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:46:27,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:46:27,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:46:27,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:46:27,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:46:27,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:46:27,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:46:27,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:46:27,427 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_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c783d9214012f4bff6327cd9f7b291047ddaff08 [2020-11-29 18:46:27,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:46:27,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:46:27,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:46:27,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:46:27,864 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:46:27,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i [2020-11-29 18:46:27,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/data/e08a76edd/2fbd713c19dc4c689067b7c98f806fa9/FLAG60c80a0e4 [2020-11-29 18:46:28,519 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:46:28,520 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i [2020-11-29 18:46:28,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/data/e08a76edd/2fbd713c19dc4c689067b7c98f806fa9/FLAG60c80a0e4 [2020-11-29 18:46:28,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/data/e08a76edd/2fbd713c19dc4c689067b7c98f806fa9 [2020-11-29 18:46:28,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:46:28,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:46:28,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:46:28,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:46:28,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:46:28,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:46:28" (1/1) ... [2020-11-29 18:46:28,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24239c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:28, skipping insertion in model container [2020-11-29 18:46:28,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:46:28" (1/1) ... [2020-11-29 18:46:28,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:46:28,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:46:29,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:46:29,406 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:46:29,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:46:29,562 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:46:29,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29 WrapperNode [2020-11-29 18:46:29,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:46:29,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:46:29,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:46:29,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:46:29,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:46:29,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:46:29,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:46:29,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:46:29,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... [2020-11-29 18:46:29,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:46:29,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:46:29,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:46:29,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:46:29,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/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 [2020-11-29 18:46:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:46:29,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:46:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:46:29,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 18:46:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:46:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 18:46:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:46:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:46:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:46:29,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:46:30,491 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:46:30,492 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-29 18:46:30,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:46:30 BoogieIcfgContainer [2020-11-29 18:46:30,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:46:30,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:46:30,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:46:30,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:46:30,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:46:28" (1/3) ... [2020-11-29 18:46:30,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d9aef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:46:30, skipping insertion in model container [2020-11-29 18:46:30,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:46:29" (2/3) ... [2020-11-29 18:46:30,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d9aef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:46:30, skipping insertion in model container [2020-11-29 18:46:30,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:46:30" (3/3) ... [2020-11-29 18:46:30,504 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-2.i [2020-11-29 18:46:30,520 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:46:30,525 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:46:30,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:46:30,578 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:46:30,580 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:46:30,580 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:46:30,580 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:46:30,580 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:46:30,581 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:46:30,581 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:46:30,581 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:46:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-29 18:46:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 18:46:30,606 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:46:30,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:46:30,607 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:46:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:46:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash -231511638, now seen corresponding path program 1 times [2020-11-29 18:46:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:46:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178341045] [2020-11-29 18:46:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:46:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:46:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:46:30,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178341045] [2020-11-29 18:46:30,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:46:30,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:46:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72058599] [2020-11-29 18:46:30,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 18:46:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:46:30,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:46:30,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:46:30,908 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-11-29 18:46:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:46:30,937 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2020-11-29 18:46:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:46:30,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 18:46:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:46:30,949 INFO L225 Difference]: With dead ends: 52 [2020-11-29 18:46:30,950 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 18:46:30,957 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 [2020-11-29 18:46:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 18:46:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 18:46:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 18:46:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-11-29 18:46:31,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-11-29 18:46:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:46:31,006 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-11-29 18:46:31,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 18:46:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-11-29 18:46:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 18:46:31,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:46:31,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:46:31,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:46:31,008 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:46:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:46:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash 90050292, now seen corresponding path program 1 times [2020-11-29 18:46:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:46:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716410814] [2020-11-29 18:46:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:46:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:46:31,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:46:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:46:31,183 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:46:31,236 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:46:31,236 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:46:31,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:46:31,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:46:31 BoogieIcfgContainer [2020-11-29 18:46:31,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:46:31,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:46:31,295 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:46:31,295 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:46:31,295 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:46:30" (3/4) ... [2020-11-29 18:46:31,298 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:46:31,376 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0b084da5-78a3-4af0-9cd1-ac437ee2b395/bin/uautomizer/witness.graphml [2020-11-29 18:46:31,380 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:46:31,383 INFO L168 Benchmark]: Toolchain (without parser) took 2570.15 ms. Allocated memory was 73.4 MB in the beginning and 100.7 MB in the end (delta: 27.3 MB). Free memory was 33.4 MB in the beginning and 38.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,384 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory was 50.7 MB in the beginning and 50.7 MB in the end (delta: 76.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:46:31,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 746.30 ms. Allocated memory was 73.4 MB in the beginning and 100.7 MB in the end (delta: 27.3 MB). Free memory was 33.2 MB in the beginning and 66.0 MB in the end (delta: -32.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.96 ms. Allocated memory is still 100.7 MB. Free memory was 66.0 MB in the beginning and 63.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,388 INFO L168 Benchmark]: Boogie Preprocessor took 66.72 ms. Allocated memory is still 100.7 MB. Free memory was 63.9 MB in the beginning and 62.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,389 INFO L168 Benchmark]: RCFGBuilder took 771.42 ms. Allocated memory is still 100.7 MB. Free memory was 62.2 MB in the beginning and 64.8 MB in the end (delta: -2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,390 INFO L168 Benchmark]: TraceAbstraction took 797.56 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 41.1 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,391 INFO L168 Benchmark]: Witness Printer took 86.09 ms. Allocated memory is still 100.7 MB. Free memory was 41.1 MB in the beginning and 38.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:46:31,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory was 50.7 MB in the beginning and 50.7 MB in the end (delta: 76.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 746.30 ms. Allocated memory was 73.4 MB in the beginning and 100.7 MB in the end (delta: 27.3 MB). Free memory was 33.2 MB in the beginning and 66.0 MB in the end (delta: -32.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.96 ms. Allocated memory is still 100.7 MB. Free memory was 66.0 MB in the beginning and 63.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.72 ms. Allocated memory is still 100.7 MB. Free memory was 63.9 MB in the beginning and 62.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 771.42 ms. Allocated memory is still 100.7 MB. Free memory was 62.2 MB in the beginning and 64.8 MB in the end (delta: -2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 797.56 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 41.1 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 86.09 ms. Allocated memory is still 100.7 MB. Free memory was 41.1 MB in the beginning and 38.8 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: [L999] SLL* head = malloc(sizeof(SLL)); [L1000] head->next = ((void*)0) [L1001] head->data = 0 [L1003] SLL* x = head; [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1016] COND TRUE __VERIFIER_nondet_int() [L1017] x = malloc(sizeof(SLL)) [L1018] x->data = 1 [L1019] x->next = head [L1020] head = x [L1040] x = head [L1043] EXPR x->data [L1043] COND FALSE !(x->data != 1) [L1049] EXPR x->next [L1049] x = x->next [L1050] COND TRUE \read(*x) [L1052] EXPR x->data [L1052] COND TRUE x->data != 1 [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-simple-white-blue-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...