./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:48,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:48,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:48,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:48,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:48,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:48,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:48,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:48,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:48,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:48,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:48,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:48,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:48,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:48,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:48,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:48,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:48,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:48,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:48,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:48,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:48,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:48,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:48,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:48,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:48,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:48,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:48,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:48,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:48,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:48,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:48,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:48,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:48,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:48,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:48,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:48,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:48,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:48,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:48,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:48,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:48,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:44:48,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:48,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:48,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:48,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:48,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:48,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:48,806 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:48,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:48,807 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:48,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:44:48,808 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:48,809 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:48,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:44:48,809 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:44:48,809 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:48,810 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:44:48,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:44:48,810 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:44:48,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:48,811 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:48,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:44:48,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:48,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:48,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:48,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:48,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:48,814 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:48,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:48,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:48,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:48,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:48,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:48,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:48,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:48,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:48,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:48,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:44:48,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:44:48,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:48,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:48,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:48,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 [2021-11-23 16:44:49,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:49,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:49,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:49,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:49,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:49,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-11-23 16:44:49,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/9cbd13f4e/bfe9d597534b4bc4b53bc6e842d90ae4/FLAG509c9bbe4 [2021-11-23 16:44:49,703 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:49,703 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-11-23 16:44:49,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/9cbd13f4e/bfe9d597534b4bc4b53bc6e842d90ae4/FLAG509c9bbe4 [2021-11-23 16:44:50,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/9cbd13f4e/bfe9d597534b4bc4b53bc6e842d90ae4 [2021-11-23 16:44:50,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:50,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:50,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:50,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:50,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:50,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a44beb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50, skipping insertion in model container [2021-11-23 16:44:50,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:50,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:50,265 WARN L230 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-11-23 16:44:50,284 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-23 16:44:50,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:50,310 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:50,322 WARN L230 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-11-23 16:44:50,330 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-23 16:44:50,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:50,356 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:50,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50 WrapperNode [2021-11-23 16:44:50,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:50,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:50,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:50,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:50,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,403 INFO L137 Inliner]: procedures = 29, calls = 61, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 110 [2021-11-23 16:44:50,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:50,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:50,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:50,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:50,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:50,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:50,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:50,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:50,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:50,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:50,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:44:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:44:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 16:44:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:44:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-11-23 16:44:50,576 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-11-23 16:44:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:44:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 16:44:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 16:44:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 16:44:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-23 16:44:50,577 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-23 16:44:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:44:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:44:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-11-23 16:44:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-11-23 16:44:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 16:44:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 16:44:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-11-23 16:44:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-11-23 16:44:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:44:50,710 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:50,711 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:51,036 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:51,070 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:44:51,074 INFO L158 Benchmark]: Toolchain (without parser) took 1014.49ms. Allocated memory is still 111.1MB. Free memory was 80.3MB in the beginning and 62.0MB in the end (delta: 18.3MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,075 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory was 65.6MB in the beginning and 65.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:51,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.68ms. Allocated memory is still 111.1MB. Free memory was 80.0MB in the beginning and 83.9MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,079 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.10ms. Allocated memory is still 111.1MB. Free memory was 83.9MB in the beginning and 81.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,081 INFO L158 Benchmark]: Boogie Preprocessor took 65.00ms. Allocated memory is still 111.1MB. Free memory was 81.8MB in the beginning and 80.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,082 INFO L158 Benchmark]: RCFGBuilder took 600.41ms. Allocated memory is still 111.1MB. Free memory was 80.1MB in the beginning and 62.0MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 16:44:51,085 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory was 65.6MB in the beginning and 65.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.68ms. Allocated memory is still 111.1MB. Free memory was 80.0MB in the beginning and 83.9MB in the end (delta: -3.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.10ms. Allocated memory is still 111.1MB. Free memory was 83.9MB in the beginning and 81.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.00ms. Allocated memory is still 111.1MB. Free memory was 81.8MB in the beginning and 80.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 600.41ms. Allocated memory is still 111.1MB. Free memory was 80.1MB in the beginning and 62.0MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:44:51,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:53,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:53,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:53,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:53,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:53,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:53,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:53,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:53,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:53,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:53,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:53,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:53,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:53,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:53,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:53,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:53,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:53,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:53,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:53,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:53,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:53,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:53,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:53,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:53,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:53,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:53,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:53,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:53,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:53,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:53,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:53,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:53,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:53,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:53,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:53,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:53,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:53,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:53,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:53,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:53,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:53,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:44:53,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:53,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:53,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:53,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:53,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:53,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:53,726 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:53,726 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:53,727 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:53,727 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:53,727 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:53,727 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:53,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:53,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:53,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:53,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:53,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:53,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:53,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:53,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:44:53,730 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:44:53,730 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:44:53,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:53,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:53,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:53,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:53,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:53,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:44:53,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:53,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:53,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:53,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:53,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:53,733 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:44:53,733 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:44:53,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:53,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:53,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:53,734 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 [2021-11-23 16:44:54,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:54,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:54,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:54,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:54,146 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:54,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-11-23 16:44:54,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/03ad2df01/3f0d6f7ee84f4a489b30b7bd2b2432c7/FLAG316fde064 [2021-11-23 16:44:54,828 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:54,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-11-23 16:44:54,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/03ad2df01/3f0d6f7ee84f4a489b30b7bd2b2432c7/FLAG316fde064 [2021-11-23 16:44:55,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/data/03ad2df01/3f0d6f7ee84f4a489b30b7bd2b2432c7 [2021-11-23 16:44:55,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:55,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:55,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:55,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:55,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:55,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a853c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55, skipping insertion in model container [2021-11-23 16:44:55,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:55,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:55,335 WARN L230 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-11-23 16:44:55,374 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-23 16:44:55,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:55,426 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 16:44:55,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:55,452 WARN L230 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-11-23 16:44:55,462 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-23 16:44:55,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:55,500 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:55,519 WARN L230 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_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-11-23 16:44:55,549 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-23 16:44:55,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:55,589 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:55,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55 WrapperNode [2021-11-23 16:44:55,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:55,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:55,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:55,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:55,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,658 INFO L137 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 105 [2021-11-23 16:44:55,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:55,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:55,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:55,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:55,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:55,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:55,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:55,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:55,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (1/1) ... [2021-11-23 16:44:55,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:55,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:55,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:55,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:44:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:44:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:44:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 16:44:55,837 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-11-23 16:44:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-11-23 16:44:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:44:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 16:44:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 16:44:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 16:44:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-23 16:44:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-23 16:44:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:44:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-11-23 16:44:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-11-23 16:44:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 16:44:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 16:44:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-11-23 16:44:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-11-23 16:44:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:44:55,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:44:56,006 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:56,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:56,468 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:56,485 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:44:56,488 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 16:44:56,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:56 BoogieIcfgContainer [2021-11-23 16:44:56,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:44:56,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:44:56,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:44:56,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:44:56,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:44:55" (1/3) ... [2021-11-23 16:44:56,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a92bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:44:56, skipping insertion in model container [2021-11-23 16:44:56,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:55" (2/3) ... [2021-11-23 16:44:56,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a92bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:44:56, skipping insertion in model container [2021-11-23 16:44:56,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:56" (3/3) ... [2021-11-23 16:44:56,508 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-11-23 16:44:56,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:44:56,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:44:56,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:44:56,584 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:44:56,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:44:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 states have internal predecessors, (66), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-23 16:44:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 16:44:56,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:56,611 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:44:56,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:44:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash -858928279, now seen corresponding path program 1 times [2021-11-23 16:44:56,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:44:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885356409] [2021-11-23 16:44:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:56,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:44:56,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:44:56,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:44:56,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:44:56,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 16:44:56,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:44:56,931 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:44:56,935 INFO L158 Benchmark]: Toolchain (without parser) took 1803.31ms. Allocated memory is still 69.2MB. Free memory was 52.5MB in the beginning and 29.9MB in the end (delta: 22.6MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2021-11-23 16:44:56,935 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 69.2MB. Free memory is still 50.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:56,936 INFO L158 Benchmark]: CACSL2BoogieTranslator took 457.25ms. Allocated memory is still 69.2MB. Free memory was 52.3MB in the beginning and 38.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:44:56,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.09ms. Allocated memory is still 69.2MB. Free memory was 38.2MB in the beginning and 36.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:56,937 INFO L158 Benchmark]: Boogie Preprocessor took 83.49ms. Allocated memory is still 69.2MB. Free memory was 36.3MB in the beginning and 34.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:56,939 INFO L158 Benchmark]: RCFGBuilder took 746.21ms. Allocated memory is still 69.2MB. Free memory was 34.2MB in the beginning and 39.4MB in the end (delta: -5.1MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-11-23 16:44:56,940 INFO L158 Benchmark]: TraceAbstraction took 439.08ms. Allocated memory is still 69.2MB. Free memory was 39.1MB in the beginning and 29.9MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:44:56,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 69.2MB. Free memory is still 50.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 457.25ms. Allocated memory is still 69.2MB. Free memory was 52.3MB in the beginning and 38.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.09ms. Allocated memory is still 69.2MB. Free memory was 38.2MB in the beginning and 36.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.49ms. Allocated memory is still 69.2MB. Free memory was 36.3MB in the beginning and 34.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 746.21ms. Allocated memory is still 69.2MB. Free memory was 34.2MB in the beginning and 39.4MB in the end (delta: -5.1MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * TraceAbstraction took 439.08ms. Allocated memory is still 69.2MB. Free memory was 39.1MB in the beginning and 29.9MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:44:57,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3359c5-55ab-4cf6-9e61-568a1fd1ea0b/bin/utaipan-fb15Y9Yzbl/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 Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable