./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8409443a6b8db5c0500e3e8aa54c33463c524ec9 ................................................................................................................................................................................................................................................................................... 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 0.1.24-cad4683 [2019-10-22 09:02:18,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:02:18,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:02:18,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:02:18,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:02:18,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:02:18,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:02:18,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:02:18,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:02:18,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:02:18,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:02:18,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:02:18,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:02:18,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:02:18,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:02:18,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:02:18,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:02:18,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:02:18,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:02:18,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:02:18,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:02:18,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:02:18,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:02:18,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:02:18,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:02:18,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:02:18,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:02:18,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:02:18,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:02:18,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:02:18,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:02:18,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:02:18,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:02:18,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:02:18,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:02:18,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:02:18,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:02:18,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:02:18,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:02:18,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:02:18,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:02:18,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:02:18,509 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:02:18,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:02:18,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:02:18,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:02:18,511 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:02:18,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:02:18,511 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:02:18,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:02:18,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:02:18,512 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:02:18,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:02:18,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:02:18,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:02:18,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:02:18,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:02:18,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:02:18,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:02:18,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:02:18,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:02:18,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:02:18,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:02:18,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:02:18,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/working_dir_34826272-cfb5-455e-bccd-97275c72926d/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(__VERIFIER_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 -> 8409443a6b8db5c0500e3e8aa54c33463c524ec9 [2019-10-22 09:02:18,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:02:18,567 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:02:18,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:02:18,574 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:02:18,574 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:02:18,575 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-optional-2.i [2019-10-22 09:02:18,629 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/data/cdf6e9530/7d59e3921d564c2da57f8a6a48edd8c3/FLAGb482bab2c [2019-10-22 09:02:19,080 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:02:19,082 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/sv-benchmarks/c/forester-heap/dll-optional-2.i [2019-10-22 09:02:19,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/data/cdf6e9530/7d59e3921d564c2da57f8a6a48edd8c3/FLAGb482bab2c [2019-10-22 09:02:19,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/data/cdf6e9530/7d59e3921d564c2da57f8a6a48edd8c3 [2019-10-22 09:02:19,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:02:19,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:02:19,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:19,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:02:19,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:02:19,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:19,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d9c2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19, skipping insertion in model container [2019-10-22 09:02:19,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:19,443 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:02:19,490 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:02:19,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:19,876 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:02:19,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:19,965 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:02:19,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19 WrapperNode [2019-10-22 09:02:19,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:19,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:19,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:02:19,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:02:19,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:19,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:20,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:02:20,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:02:20,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:02:20,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... [2019-10-22 09:02:20,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:02:20,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:02:20,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:02:20,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:02:20,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/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 [2019-10-22 09:02:20,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 09:02:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:02:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 09:02:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 09:02:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 09:02:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:02:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:02:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:02:20,523 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:02:20,524 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-22 09:02:20,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:20 BoogieIcfgContainer [2019-10-22 09:02:20,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:02:20,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:02:20,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:02:20,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:02:20,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:02:19" (1/3) ... [2019-10-22 09:02:20,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19be1e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:20, skipping insertion in model container [2019-10-22 09:02:20,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:19" (2/3) ... [2019-10-22 09:02:20,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19be1e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:20, skipping insertion in model container [2019-10-22 09:02:20,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:20" (3/3) ... [2019-10-22 09:02:20,533 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-optional-2.i [2019-10-22 09:02:20,541 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:02:20,547 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:02:20,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:02:20,579 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:02:20,580 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:02:20,580 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:02:20,580 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:02:20,580 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:02:20,580 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:02:20,580 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:02:20,580 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:02:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-22 09:02:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:02:20,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:20,601 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:20,603 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1853593862, now seen corresponding path program 1 times [2019-10-22 09:02:20,614 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:20,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529520179] [2019-10-22 09:02:20,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:20,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:20,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:20,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529520179] [2019-10-22 09:02:20,748 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:20,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:02:20,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974115448] [2019-10-22 09:02:20,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:02:20,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:20,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:02:20,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:02:20,762 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-10-22 09:02:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:20,775 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-10-22 09:02:20,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:02:20,776 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-22 09:02:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:20,784 INFO L225 Difference]: With dead ends: 43 [2019-10-22 09:02:20,785 INFO L226 Difference]: Without dead ends: 18 [2019-10-22 09:02:20,787 INFO L600 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 [2019-10-22 09:02:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-22 09:02:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-22 09:02:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 09:02:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2019-10-22 09:02:20,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2019-10-22 09:02:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:20,811 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-10-22 09:02:20,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:02:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2019-10-22 09:02:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:02:20,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:20,812 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:20,812 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2143092324, now seen corresponding path program 1 times [2019-10-22 09:02:20,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:20,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778338471] [2019-10-22 09:02:20,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:20,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:20,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:02:20,892 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:02:20,892 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:02:20,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:02:20 BoogieIcfgContainer [2019-10-22 09:02:20,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:02:20,916 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:02:20,916 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:02:20,916 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:02:20,917 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:20" (3/4) ... [2019-10-22 09:02:20,919 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:02:20,954 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_34826272-cfb5-455e-bccd-97275c72926d/bin/uautomizer/witness.graphml [2019-10-22 09:02:20,954 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:02:20,956 INFO L168 Benchmark]: Toolchain (without parser) took 1529.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 939.1 MB in the beginning and 1.0 GB in the end (delta: -110.3 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,957 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:20,957 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -170.2 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,958 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.49 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:20,958 INFO L168 Benchmark]: Boogie Preprocessor took 35.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,959 INFO L168 Benchmark]: RCFGBuilder took 477.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,959 INFO L168 Benchmark]: TraceAbstraction took 388.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:20,960 INFO L168 Benchmark]: Witness Printer took 38.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:20,962 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 539.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -170.2 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.49 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 477.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 388.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Witness Printer took 38.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 998]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = ((void*)0) [L988] head->prev = ((void*)0) [L989] COND TRUE __VERIFIER_nondet_int() [L989] head->data = 2 [L989] head->opt = malloc(sizeof(SLL)) [L989] EXPR head->opt [L989] head->opt->next = ((void*)0) [L990] SLL* x = head; [L992] COND FALSE !(__VERIFIER_nondet_int()) [L995] x = head [L996] COND TRUE x != ((void*)0) [L998] EXPR x->data [L998] EXPR x->data == 2 && x->opt == x [L998] EXPR x->opt [L998] EXPR x->data == 2 && x->opt == x [L998] COND TRUE !(x->data == 2 && x->opt == x) [L998] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 34 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=26occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...