./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c --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_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fdb95a531f91b891105aa672579f7a5a4ed687cf ........................................................................................................................................................................................................................................................................................... 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 18:25:25,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:25:25,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:25:25,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:25:25,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:25:25,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:25:26,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:25:26,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:25:26,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:25:26,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:25:26,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:25:26,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:25:26,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:25:26,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:25:26,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:25:26,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:25:26,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:25:26,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:25:26,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:25:26,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:25:26,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:25:26,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:25:26,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:25:26,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:25:26,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:25:26,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:25:26,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:25:26,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:25:26,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:25:26,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:25:26,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:25:26,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:25:26,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:25:26,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:25:26,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:25:26,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:25:26,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:25:26,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:25:26,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:25:26,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:25:26,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:25:26,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-29 18:25:26,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:25:26,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:25:26,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-29 18:25:26,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-29 18:25:26,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:25:26,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:25:26,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:25:26,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:25:26,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:25:26,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:25:26,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:25:26,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:25:26,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:25:26,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:25:26,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:25:26,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:25:26,154 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:25:26,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:25:26,154 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-29 18:25:26,155 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-29 18:25:26,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:25:26,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:25:26,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-29 18:25:26,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:25:26,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:25:26,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:25:26,157 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-29 18:25:26,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:25:26,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:25:26,159 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_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdb95a531f91b891105aa672579f7a5a4ed687cf [2020-11-29 18:25:26,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:25:26,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:25:26,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:25:26,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:25:26,511 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:25:26,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2020-11-29 18:25:26,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/data/1298087aa/7d5025ce8c844189953d8ba4386752c1/FLAG395d15c14 [2020-11-29 18:25:27,205 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:25:27,206 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2020-11-29 18:25:27,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/data/1298087aa/7d5025ce8c844189953d8ba4386752c1/FLAG395d15c14 [2020-11-29 18:25:27,567 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/data/1298087aa/7d5025ce8c844189953d8ba4386752c1 [2020-11-29 18:25:27,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:25:27,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:25:27,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:25:27,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:25:27,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:25:27,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c950ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27, skipping insertion in model container [2020-11-29 18:25:27,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:25:27,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:25:27,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:25:27,854 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:25:27,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:25:27,897 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:25:27,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27 WrapperNode [2020-11-29 18:25:27,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:25:27,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:25:27,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:25:27,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:25:27,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:25:27,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:25:27,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:25:27,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:25:27,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... [2020-11-29 18:25:27,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:25:27,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:25:27,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:25:27,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:25:27,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:25:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-29 18:25:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 18:25:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-11-29 18:25:28,049 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-11-29 18:25:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-29 18:25:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-29 18:25:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:25:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-29 18:25:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-11-29 18:25:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 18:25:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:25:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:25:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:25:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:25:28,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:25:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:25:28,622 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:25:28,622 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 18:25:28,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:25:28 BoogieIcfgContainer [2020-11-29 18:25:28,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:25:28,626 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-29 18:25:28,626 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-29 18:25:28,638 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-29 18:25:28,639 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:25:28" (1/1) ... [2020-11-29 18:25:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:25:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 18:25:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 36 states and 46 transitions. [2020-11-29 18:25:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-11-29 18:25:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 18:25:28,704 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 18:25:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:25:29,092 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 18:25:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 18:25:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 44 states and 59 transitions. [2020-11-29 18:25:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-11-29 18:25:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 18:25:29,434 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 18:25:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:25:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:25:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 18:25:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 46 states and 62 transitions. [2020-11-29 18:25:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-11-29 18:25:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 18:25:30,558 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 18:25:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:25:30,657 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:25:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:25:30,708 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:25:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:25:30,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:25:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:25:30,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:25:30,955 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 3 iterations. [2020-11-29 18:25:31,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 29.11 06:25:31 ImpRootNode [2020-11-29 18:25:31,039 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-29 18:25:31,040 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:25:31,040 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:25:31,040 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:25:31,041 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:25:28" (3/4) ... [2020-11-29 18:25:31,043 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:25:31,124 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cca4ddb8-fb97-4976-a796-78a1d0802d3e/bin/ukojak/witness.graphml [2020-11-29 18:25:31,124 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:25:31,127 INFO L168 Benchmark]: Toolchain (without parser) took 3553.98 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 80.7 MB in the beginning and 82.8 MB in the end (delta: -2.0 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:25:31,128 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory is still 61.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:25:31,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.42 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 82.1 MB in the end (delta: -1.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:25:31,129 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.34 ms. Allocated memory is still 104.9 MB. Free memory was 82.1 MB in the beginning and 80.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:25:31,130 INFO L168 Benchmark]: Boogie Preprocessor took 32.24 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:25:31,131 INFO L168 Benchmark]: RCFGBuilder took 650.78 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 58.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 18:25:31,132 INFO L168 Benchmark]: CodeCheck took 2412.96 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 58.3 MB in the beginning and 86.8 MB in the end (delta: -28.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:25:31,132 INFO L168 Benchmark]: Witness Printer took 84.93 ms. Allocated memory is still 125.8 MB. Free memory was 86.8 MB in the beginning and 82.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:25:31,136 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 20 SDslu, 24 SDs, 0 SdLazy, 146 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s 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: [L60] CALL nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L25] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L26] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L26] n->right = nondet_tree() [L27] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L60] RET nondet_tree() [L55] CALL, EXPR max(n) VAL [n={-1:0}] [L32] COND FALSE !(!n) [L35] EXPR n->left VAL [n={-1:0}, n={-1:0}, n->left={0:0}] [L35] CALL, EXPR max(n->left) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L35] RET, EXPR max(n->left) VAL [max(n->left)=-2147483648, n={-1:0}, n={-1:0}, n->left={0:0}] [L35] int a = max(n->left); [L36] EXPR n->right VAL [a=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L36] CALL, EXPR max(n->right) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L36] RET, EXPR max(n->right) VAL [a=-2147483648, max(n->right)=-2147483648, n={-1:0}, n={-1:0}, n->right={0:0}] [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; VAL [\result=-2147483648, a=-2147483648, b=-2147483648, n={-1:0}, n={-1:0}] [L55] RET, EXPR max(n) [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] n->data [L11] COND TRUE !cond [L9] __assert_fail("0", "tree_max_incorrect.c", 9, "reach_error") * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory is still 61.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.42 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 82.1 MB in the end (delta: -1.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.34 ms. Allocated memory is still 104.9 MB. Free memory was 82.1 MB in the beginning and 80.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.24 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 650.78 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 58.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * CodeCheck took 2412.96 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 58.3 MB in the beginning and 86.8 MB in the end (delta: -28.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 84.93 ms. Allocated memory is still 125.8 MB. Free memory was 86.8 MB in the beginning and 82.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...