./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --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_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d175b23e7b65a104262a874bc9fb10ae6a765c43 ................................................................................................................................................................................................................................................................................ 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 10:14:53,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 10:14:53,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 10:14:53,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 10:14:53,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 10:14:53,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 10:14:53,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 10:14:53,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 10:14:53,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 10:14:53,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 10:14:53,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 10:14:53,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 10:14:53,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 10:14:53,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 10:14:53,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 10:14:53,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 10:14:53,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 10:14:53,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 10:14:53,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 10:14:53,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 10:14:53,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 10:14:53,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 10:14:53,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 10:14:53,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 10:14:53,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 10:14:53,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 10:14:53,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 10:14:53,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 10:14:53,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 10:14:53,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 10:14:53,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 10:14:53,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 10:14:53,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 10:14:53,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 10:14:53,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 10:14:53,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 10:14:53,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 10:14:53,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 10:14:53,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 10:14:53,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 10:14:53,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 10:14:53,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2019-10-22 10:14:53,718 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 10:14:53,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 10:14:53,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 10:14:53,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2019-10-22 10:14:53,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 10:14:53,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 10:14:53,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 10:14:53,721 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 10:14:53,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 10:14:53,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 10:14:53,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 10:14:53,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 10:14:53,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 10:14:53,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 10:14:53,722 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 10:14:53,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 10:14:53,722 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 10:14:53,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 10:14:53,723 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2019-10-22 10:14:53,723 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2019-10-22 10:14:53,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 10:14:53,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 10:14:53,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-10-22 10:14:53,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 10:14:53,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 10:14:53,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 10:14:53,724 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2019-10-22 10:14:53,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 10:14:53,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 10:14:53,725 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_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/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(__VERIFIER_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 -> d175b23e7b65a104262a874bc9fb10ae6a765c43 [2019-10-22 10:14:53,766 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 10:14:53,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 10:14:53,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 10:14:53,784 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 10:14:53,784 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 10:14:53,785 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/../../sv-benchmarks/c/verifythis/tree_max.c [2019-10-22 10:14:53,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/data/55cccfe6c/5d1cee64dbf943e5a9b6e49baf7ea1b8/FLAG6c65b6654 [2019-10-22 10:14:54,224 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 10:14:54,224 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/sv-benchmarks/c/verifythis/tree_max.c [2019-10-22 10:14:54,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/data/55cccfe6c/5d1cee64dbf943e5a9b6e49baf7ea1b8/FLAG6c65b6654 [2019-10-22 10:14:54,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/data/55cccfe6c/5d1cee64dbf943e5a9b6e49baf7ea1b8 [2019-10-22 10:14:54,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 10:14:54,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 10:14:54,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 10:14:54,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 10:14:54,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 10:14:54,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ee7fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54, skipping insertion in model container [2019-10-22 10:14:54,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,268 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 10:14:54,290 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 10:14:54,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:14:54,585 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 10:14:54,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:14:54,618 INFO L192 MainTranslator]: Completed translation [2019-10-22 10:14:54,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54 WrapperNode [2019-10-22 10:14:54,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 10:14:54,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 10:14:54,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 10:14:54,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 10:14:54,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 10:14:54,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 10:14:54,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 10:14:54,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 10:14:54,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:54,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 10:14:54,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 10:14:54,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 10:14:54,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 10:14:54,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/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 [2019-10-22 10:14:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 10:14:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-22 10:14:54,722 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-22 10:14:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2019-10-22 10:14:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2019-10-22 10:14:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-22 10:14:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-10-22 10:14:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 10:14:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 10:14:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 10:14:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 10:14:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 10:14:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 10:14:54,976 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 10:14:54,976 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 10:14:54,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:14:54 BoogieIcfgContainer [2019-10-22 10:14:54,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 10:14:54,978 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2019-10-22 10:14:54,978 INFO L271 PluginConnector]: Initializing CodeCheck... [2019-10-22 10:14:54,990 INFO L275 PluginConnector]: CodeCheck initialized [2019-10-22 10:14:54,990 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:14:54" (1/1) ... [2019-10-22 10:14:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 10:14:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:14:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 36 states and 46 transitions. [2019-10-22 10:14:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2019-10-22 10:14:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 10:14:55,048 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:14:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:14:55,382 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 10:14:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:14:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 44 states and 59 transitions. [2019-10-22 10:14:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2019-10-22 10:14:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 10:14:55,535 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:14:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:14:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 10:14:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:14:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 46 states and 62 transitions. [2019-10-22 10:14:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2019-10-22 10:14:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 10:14:56,221 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:14:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:14:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:14:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:14:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:14:56,505 WARN L489 CodeCheckObserver]: This program is UNSAFE, Check terminated with 3 iterations. [2019-10-22 10:14:56,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 22.10 10:14:56 ImpRootNode [2019-10-22 10:14:56,563 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2019-10-22 10:14:56,563 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 10:14:56,564 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 10:14:56,564 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 10:14:56,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:14:54" (3/4) ... [2019-10-22 10:14:56,567 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 10:14:56,705 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7de7a6ef-7820-4b6b-ae50-12c6357ffec9/bin/ukojak/witness.graphml [2019-10-22 10:14:56,705 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 10:14:56,707 INFO L168 Benchmark]: Toolchain (without parser) took 2456.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.8 MB in the beginning and 964.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 120.7 MB. Max. memory is 11.5 GB. [2019-10-22 10:14:56,708 INFO L168 Benchmark]: CDTParser took 0.23 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 10:14:56,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -188.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 10:14:56,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.01 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 10:14:56,710 INFO L168 Benchmark]: Boogie Preprocessor took 21.20 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 10:14:56,711 INFO L168 Benchmark]: RCFGBuilder took 300.30 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 10:14:56,712 INFO L168 Benchmark]: CodeCheck took 1585.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.0 MB in the end (delta: 135.3 MB). Peak memory consumption was 135.3 MB. Max. memory is 11.5 GB. [2019-10-22 10:14:56,712 INFO L168 Benchmark]: Witness Printer took 141.48 ms. Allocated memory is still 1.2 GB. Free memory was 970.0 MB in the beginning and 964.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 10:14:56,729 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 20 SDslu, 24 SDs, 0 SdLazy, 146 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 2480 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 9/9 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: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L58] CALL nondet_tree() [L18] COND FALSE !(__VERIFIER_nondet_bool()) [L21] struct node *n = (struct node *)malloc(sizeof(struct node)); [L22] n->data = __VERIFIER_nondet_int() [L23] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; VAL [\result={0:0}] [L23] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L23] n->left = nondet_tree() [L24] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; VAL [\result={0:0}] [L24] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L24] n->right = nondet_tree() [L25] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L58] RET nondet_tree() [L53] CALL, EXPR max(n) VAL [n={-1:0}] [L30] COND FALSE !(!n) [L33] EXPR n->left VAL [n={-1:0}, n={-1:0}, n->left={0:0}] [L33] CALL, EXPR max(n->left) VAL [n={0:0}] [L30] COND TRUE !n [L31] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L33] RET, EXPR max(n->left) VAL [max(n->left)=-2147483648, n={-1:0}, n={-1:0}, n->left={0:0}] [L33] int a = max(n->left); [L34] EXPR n->right VAL [a=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L34] CALL, EXPR max(n->right) VAL [n={0:0}] [L30] COND TRUE !n [L31] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L34] RET, EXPR max(n->right) VAL [a=-2147483648, max(n->right)=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L34] int b = max(n->right); [L35] COND TRUE a >= b [L35] return a; VAL [\result=-2147483648, a=-2147483648, b=-2147483648, n={-1:0}, n={-1:0}] [L53] RET, EXPR max(n) [L53] int a = max(n); [L54] CALL check(n, a) [L41] COND TRUE \read(*n) [L42] n->data [L9] COND TRUE !cond [L9] __VERIFIER_error() * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 367.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -188.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.01 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 21.20 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 300.30 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * CodeCheck took 1585.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 970.0 MB in the end (delta: 135.3 MB). Peak memory consumption was 135.3 MB. Max. memory is 11.5 GB. * Witness Printer took 141.48 ms. Allocated memory is still 1.2 GB. Free memory was 970.0 MB in the beginning and 964.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...