./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f9d3bc4199d475d16a98f98af89b165bc24fe0a085f06600e60f95805b0186f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:43:15,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:43:15,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:43:15,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:43:15,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:43:15,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:43:15,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:43:15,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:43:15,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:43:15,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:43:15,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:43:15,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:43:15,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:43:15,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:43:15,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:43:15,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:43:15,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:43:15,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:43:15,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:43:15,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:43:15,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:43:15,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:43:15,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:43:15,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:43:15,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:43:15,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:43:15,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:43:15,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:43:15,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:43:15,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:43:15,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:43:15,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:43:15,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:43:15,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:43:15,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:43:15,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:43:15,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:43:15,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:43:15,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:43:15,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:43:15,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:43:15,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:43:15,683 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:43:15,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:43:15,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:43:15,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:43:15,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:43:15,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:43:15,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:43:15,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:43:15,686 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:43:15,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:43:15,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:43:15,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:43:15,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:43:15,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:43:15,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:43:15,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:43:15,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:43:15,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:43:15,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:43:15,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:43:15,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:43:15,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:43:15,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:43:15,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:43:15,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:43:15,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:43:15,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:43:15,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:43:15,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:43:15,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:43:15,691 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:43:15,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:43:15,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:43:15,691 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_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f9d3bc4199d475d16a98f98af89b165bc24fe0a085f06600e60f95805b0186f [2022-11-21 16:43:16,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:43:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:43:16,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:43:16,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:43:16,080 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:43:16,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2022-11-21 16:43:19,358 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:43:19,692 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:43:19,692 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2022-11-21 16:43:19,702 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/data/0d2a070c3/26bacced73b6463b9da2c6a793c26ee7/FLAG105fdd450 [2022-11-21 16:43:19,728 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/data/0d2a070c3/26bacced73b6463b9da2c6a793c26ee7 [2022-11-21 16:43:19,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:43:19,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:43:19,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:43:19,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:43:19,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:43:19,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:43:19" (1/1) ... [2022-11-21 16:43:19,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1f0fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:19, skipping insertion in model container [2022-11-21 16:43:19,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:43:19" (1/1) ... [2022-11-21 16:43:19,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:43:19,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:43:19,999 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2022-11-21 16:43:20,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:43:20,055 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:43:20,073 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2022-11-21 16:43:20,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:43:20,109 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:43:20,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20 WrapperNode [2022-11-21 16:43:20,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:43:20,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:43:20,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:43:20,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:43:20,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,152 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2022-11-21 16:43:20,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:43:20,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:43:20,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:43:20,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:43:20,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:43:20,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:43:20,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:43:20,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:43:20,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (1/1) ... [2022-11-21 16:43:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:43:20,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:43:20,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:43:20,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:43:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:43:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:43:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-21 16:43:20,273 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-21 16:43:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-21 16:43:20,273 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-21 16:43:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:43:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-21 16:43:20,274 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-21 16:43:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:43:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:43:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:43:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:43:20,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:43:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:43:20,368 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:43:20,370 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:43:20,670 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:43:20,677 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:43:20,678 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 16:43:20,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:43:20 BoogieIcfgContainer [2022-11-21 16:43:20,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:43:20,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:43:20,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:43:20,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:43:20,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:43:19" (1/3) ... [2022-11-21 16:43:20,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500e9b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:43:20, skipping insertion in model container [2022-11-21 16:43:20,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:43:20" (2/3) ... [2022-11-21 16:43:20,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500e9b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:43:20, skipping insertion in model container [2022-11-21 16:43:20,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:43:20" (3/3) ... [2022-11-21 16:43:20,691 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2022-11-21 16:43:20,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:43:20,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:43:20,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:43:20,767 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3075c9e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:43:20,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:43:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 16:43:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:43:20,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:43:20,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:43:20,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:43:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:43:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash -891537794, now seen corresponding path program 1 times [2022-11-21 16:43:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:43:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041217141] [2022-11-21 16:43:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:43:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:43:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:43:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:21,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 16:43:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:43:21,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:43:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041217141] [2022-11-21 16:43:21,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041217141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:43:21,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:43:21,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:43:21,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645329330] [2022-11-21 16:43:21,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:43:21,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:43:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:43:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:43:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:43:21,652 INFO L87 Difference]: Start difference. First operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:43:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:43:22,269 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2022-11-21 16:43:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:43:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-21 16:43:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:43:22,284 INFO L225 Difference]: With dead ends: 73 [2022-11-21 16:43:22,285 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 16:43:22,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:43:22,299 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:43:22,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 100 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:43:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 16:43:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-21 16:43:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-21 16:43:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-11-21 16:43:22,372 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 18 [2022-11-21 16:43:22,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:43:22,373 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-11-21 16:43:22,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:43:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-11-21 16:43:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:43:22,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:43:22,381 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:43:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:43:22,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:43:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:43:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1509693249, now seen corresponding path program 1 times [2022-11-21 16:43:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:43:22,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431002783] [2022-11-21 16:43:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:43:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:43:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:22,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:43:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 16:43:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:22,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:43:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:22,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 16:43:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:43:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:43:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:43:22,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431002783] [2022-11-21 16:43:22,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431002783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:43:22,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:43:22,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:43:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793907912] [2022-11-21 16:43:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:43:22,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:43:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:43:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:43:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:43:22,882 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-21 16:43:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:43:23,249 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-11-21 16:43:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:43:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-21 16:43:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:43:23,256 INFO L225 Difference]: With dead ends: 47 [2022-11-21 16:43:23,256 INFO L226 Difference]: Without dead ends: 36 [2022-11-21 16:43:23,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:43:23,270 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:43:23,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:43:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-21 16:43:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-21 16:43:23,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-21 16:43:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-21 16:43:23,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 28 [2022-11-21 16:43:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:43:23,286 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-21 16:43:23,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-21 16:43:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-21 16:43:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 16:43:23,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:43:23,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:43:23,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:43:23,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:43:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:43:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash -896236761, now seen corresponding path program 1 times [2022-11-21 16:43:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:43:23,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522192586] [2022-11-21 16:43:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:43:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:43:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:43:23,329 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:43:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:43:23,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:43:23,446 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:43:23,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location checkErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-21 16:43:23,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:43:23,456 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-21 16:43:23,462 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 16:43:23,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 04:43:23 BoogieIcfgContainer [2022-11-21 16:43:23,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 16:43:23,521 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 16:43:23,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 16:43:23,521 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 16:43:23,522 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:43:20" (3/4) ... [2022-11-21 16:43:23,525 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-21 16:43:23,597 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 16:43:23,598 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 16:43:23,599 INFO L158 Benchmark]: Toolchain (without parser) took 3864.32ms. Allocated memory is still 146.8MB. Free memory was 115.8MB in the beginning and 110.8MB in the end (delta: 5.1MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,599 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 69.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:43:23,600 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.77ms. Allocated memory is still 146.8MB. Free memory was 115.4MB in the beginning and 105.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,600 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.58ms. Allocated memory is still 146.8MB. Free memory was 105.3MB in the beginning and 103.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,601 INFO L158 Benchmark]: Boogie Preprocessor took 43.76ms. Allocated memory is still 146.8MB. Free memory was 103.5MB in the beginning and 102.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,601 INFO L158 Benchmark]: RCFGBuilder took 482.71ms. Allocated memory is still 146.8MB. Free memory was 102.3MB in the beginning and 89.3MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,602 INFO L158 Benchmark]: TraceAbstraction took 2836.97ms. Allocated memory is still 146.8MB. Free memory was 88.5MB in the beginning and 113.9MB in the end (delta: -25.4MB). Peak memory consumption was 46.0MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,603 INFO L158 Benchmark]: Witness Printer took 77.06ms. Allocated memory is still 146.8MB. Free memory was 113.9MB in the beginning and 110.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-21 16:43:23,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 69.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.77ms. Allocated memory is still 146.8MB. Free memory was 115.4MB in the beginning and 105.3MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.58ms. Allocated memory is still 146.8MB. Free memory was 105.3MB in the beginning and 103.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.76ms. Allocated memory is still 146.8MB. Free memory was 103.5MB in the beginning and 102.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 482.71ms. Allocated memory is still 146.8MB. Free memory was 102.3MB in the beginning and 89.3MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2836.97ms. Allocated memory is still 146.8MB. Free memory was 88.5MB in the beginning and 113.9MB in the end (delta: -25.4MB). Peak memory consumption was 46.0MB. Max. memory is 16.1GB. * Witness Printer took 77.06ms. Allocated memory is still 146.8MB. Free memory was 113.9MB in the beginning and 110.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L60] CALL, EXPR 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 [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 [n={-1:0}, nondet_tree()={0:0}] [L26] n->right = nondet_tree() [L27] return n; VAL [\result={-1:0}, n={-1:0}] [L60] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L60] CALL task(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) VAL [max(n)=-2147483648, n={-1:0}, n={-1:0}] [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] EXPR n->data [L44] CALL __VERIFIER_assert(n->data <= a) [L11] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L11] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 81 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75 mSDsluCounter, 192 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 155 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 419 IncrementalHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 37 mSDtfsCounter, 419 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 9/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-21 16:43:23,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4fc463-adc3-439c-9ff0-f291e92d7e71/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE