./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:17,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:17,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:17,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:17,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:17,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:17,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:17,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:17,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:17,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:17,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:17,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:17,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:17,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:17,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:17,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:17,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:17,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:17,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:17,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:17,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:17,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:17,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:17,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:17,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:17,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:17,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:17,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:17,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:17,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:17,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:17,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:17,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:17,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:17,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:17,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:17,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:17,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:17,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:17,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:17,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:17,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 17:35:17,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:17,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:17,697 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:17,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:17,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:17,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:17,699 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:17,700 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:17,700 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:17,700 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:35:17,702 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:17,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:17,702 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:35:17,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:35:17,703 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:17,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:35:17,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:35:17,704 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:35:17,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:35:17,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:35:17,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:17,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:17,705 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:35:17,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:35:17,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:17,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:17,709 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:35:17,709 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:35:17,709 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:35:17,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:17,710 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:35:17,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:17,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:17,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:17,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:17,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:17,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:17,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:17,712 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:35:17,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:35:17,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:17,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:17,713 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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-11-23 17:35:18,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:18,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:18,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:18,100 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:18,101 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:18,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-11-23 17:35:18,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/ccf506e14/e9b0bb22166849178c54909e5480b175/FLAG3b3a2540e [2021-11-23 17:35:18,909 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:18,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-11-23 17:35:18,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/ccf506e14/e9b0bb22166849178c54909e5480b175/FLAG3b3a2540e [2021-11-23 17:35:19,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/ccf506e14/e9b0bb22166849178c54909e5480b175 [2021-11-23 17:35:19,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:19,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:19,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:19,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:19,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:19,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684dcf4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19, skipping insertion in model container [2021-11-23 17:35:19,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:19,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:19,712 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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-11-23 17:35:19,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:19,772 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:19,814 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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-11-23 17:35:19,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:19,907 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:19,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19 WrapperNode [2021-11-23 17:35:19,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:19,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:19,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:19,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:19,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:19,991 INFO L137 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2021-11-23 17:35:19,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:19,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:19,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:19,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:20,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:20,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:20,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:20,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:20,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:19" (1/1) ... [2021-11-23 17:35:20,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:20,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:20,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-23 17:35:20,167 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-23 17:35:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:35:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:35:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 17:35:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 17:35:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-11-23 17:35:20,168 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-11-23 17:35:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:35:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 17:35:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-11-23 17:35:20,169 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-11-23 17:35:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:35:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-11-23 17:35:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-11-23 17:35:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:20,376 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:20,379 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:21,136 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:21,206 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:35:21,212 INFO L158 Benchmark]: Toolchain (without parser) took 2074.05ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 64.3MB in the beginning and 78.4MB in the end (delta: -14.1MB). Peak memory consumption was 50.6MB. Max. memory is 16.1GB. [2021-11-23 17:35:21,213 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 86.0MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:21,214 INFO L158 Benchmark]: CACSL2BoogieTranslator took 770.33ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 64.1MB in the beginning and 72.7MB in the end (delta: -8.6MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-11-23 17:35:21,215 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.17ms. Allocated memory is still 107.0MB. Free memory was 72.7MB in the beginning and 70.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:21,216 INFO L158 Benchmark]: Boogie Preprocessor took 73.98ms. Allocated memory is still 107.0MB. Free memory was 70.4MB in the beginning and 68.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:21,217 INFO L158 Benchmark]: RCFGBuilder took 1142.51ms. Allocated memory is still 107.0MB. Free memory was 67.7MB in the beginning and 78.4MB in the end (delta: -10.7MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2021-11-23 17:35:21,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 86.0MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 770.33ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 64.1MB in the beginning and 72.7MB in the end (delta: -8.6MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.17ms. Allocated memory is still 107.0MB. Free memory was 72.7MB in the beginning and 70.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.98ms. Allocated memory is still 107.0MB. Free memory was 70.4MB in the beginning and 68.0MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1142.51ms. Allocated memory is still 107.0MB. Free memory was 67.7MB in the beginning and 78.4MB in the end (delta: -10.7MB). Peak memory consumption was 35.5MB. 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 17:35:21,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:24,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:24,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:24,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:24,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:24,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:24,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:24,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:24,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:24,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:24,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:24,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:24,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:24,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:24,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:24,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:24,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:24,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:24,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:24,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:24,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:24,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:24,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:24,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:24,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:24,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:24,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:24,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:24,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:24,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:24,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:24,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:24,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:24,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:24,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:24,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:24,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:24,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:24,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:24,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:24,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:24,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 17:35:24,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:24,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:24,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:24,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:24,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:24,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:24,416 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:24,416 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:24,416 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:24,416 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:24,417 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:24,418 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:24,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:35:24,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:35:24,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:24,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:24,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:35:24,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:35:24,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:24,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:24,422 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:35:24,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:35:24,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:35:24,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:24,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:35:24,423 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:35:24,423 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:35:24,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:24,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:24,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:24,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:35:24,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:24,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:24,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:24,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:24,426 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:35:24,427 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:24,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:24,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:24,428 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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-11-23 17:35:24,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:24,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:24,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:24,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:24,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:24,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-11-23 17:35:24,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/3ef8dc7d4/bf6f708e7be04cdfb49e3b6d7231ba84/FLAG7090598a9 [2021-11-23 17:35:25,788 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:25,793 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-11-23 17:35:25,823 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/3ef8dc7d4/bf6f708e7be04cdfb49e3b6d7231ba84/FLAG7090598a9 [2021-11-23 17:35:26,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/data/3ef8dc7d4/bf6f708e7be04cdfb49e3b6d7231ba84 [2021-11-23 17:35:26,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:26,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:26,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:26,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:26,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:26,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9859ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26, skipping insertion in model container [2021-11-23 17:35:26,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:26,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:26,534 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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-11-23 17:35:26,575 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:26,590 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:26,647 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_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-11-23 17:35:26,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:26,716 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:26,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26 WrapperNode [2021-11-23 17:35:26,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:26,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:26,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:26,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:26,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,802 INFO L137 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 201 [2021-11-23 17:35:26,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:26,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:26,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:26,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:26,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:26,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:26,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:26,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:26,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (1/1) ... [2021-11-23 17:35:26,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:26,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:26,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:26,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-11-23 17:35:26,956 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-11-23 17:35:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:35:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:35:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 17:35:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 17:35:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-11-23 17:35:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-11-23 17:35:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:35:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 17:35:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:35:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-11-23 17:35:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-11-23 17:35:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-11-23 17:35:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-11-23 17:35:26,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:26,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:27,129 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:27,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:28,200 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:28,209 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:35:28,209 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-11-23 17:35:28,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:35:28 BoogieIcfgContainer [2021-11-23 17:35:28,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:35:28,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:35:28,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:35:28,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:35:28,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:35:26" (1/3) ... [2021-11-23 17:35:28,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4862f806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:35:28, skipping insertion in model container [2021-11-23 17:35:28,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:26" (2/3) ... [2021-11-23 17:35:28,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4862f806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:35:28, skipping insertion in model container [2021-11-23 17:35:28,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:35:28" (3/3) ... [2021-11-23 17:35:28,222 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2021-11-23 17:35:28,228 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:35:28,228 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-11-23 17:35:28,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:35:28,290 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 17:35:28,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-11-23 17:35:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 220 states, 118 states have (on average 2.1186440677966103) internal successors, (250), 206 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-23 17:35:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 17:35:28,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:28,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 17:35:28,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-23 17:35:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash 6220742, now seen corresponding path program 1 times [2021-11-23 17:35:28,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726345009] [2021-11-23 17:35:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:28,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:28,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:28,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:28,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:35:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:35:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:28,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:35:28,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:28,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726345009] [2021-11-23 17:35:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726345009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:35:28,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:35:28,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:35:28,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340984673] [2021-11-23 17:35:28,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:35:28,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:35:28,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:35:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:35:28,569 INFO L87 Difference]: Start difference. First operand has 220 states, 118 states have (on average 2.1186440677966103) internal successors, (250), 206 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:28,610 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2021-11-23 17:35:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:35:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 17:35:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:28,626 INFO L225 Difference]: With dead ends: 218 [2021-11-23 17:35:28,626 INFO L226 Difference]: Without dead ends: 216 [2021-11-23 17:35:28,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:35:28,633 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:28,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:35:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-23 17:35:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-23 17:35:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 113 states have (on average 1.8672566371681416) internal successors, (211), 202 states have internal predecessors, (211), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 17:35:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2021-11-23 17:35:28,701 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 4 [2021-11-23 17:35:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:28,702 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2021-11-23 17:35:28,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2021-11-23 17:35:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 17:35:28,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:28,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 17:35:28,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:28,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:28,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-11-23 17:35:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1692065585, now seen corresponding path program 1 times [2021-11-23 17:35:28,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:28,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117912617] [2021-11-23 17:35:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:28,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:28,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:28,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:28,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:35:29,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:35:29,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:35:29,186 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 17:35:29,190 INFO L158 Benchmark]: Toolchain (without parser) took 3167.16ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 39.3MB in the beginning and 37.3MB in the end (delta: 2.0MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2021-11-23 17:35:29,190 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 60.8MB. Free memory was 42.0MB in the beginning and 41.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:29,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 693.42ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 35.8MB in the end (delta: 3.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:35:29,192 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.61ms. Allocated memory is still 60.8MB. Free memory was 35.8MB in the beginning and 33.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:29,193 INFO L158 Benchmark]: Boogie Preprocessor took 67.11ms. Allocated memory is still 60.8MB. Free memory was 33.2MB in the beginning and 30.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:29,194 INFO L158 Benchmark]: RCFGBuilder took 1340.93ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 30.6MB in the beginning and 39.4MB in the end (delta: -8.8MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:29,195 INFO L158 Benchmark]: TraceAbstraction took 974.22ms. Allocated memory is still 81.8MB. Free memory was 39.0MB in the beginning and 37.3MB in the end (delta: 1.7MB). Peak memory consumption was 1.8MB. Max. memory is 16.1GB. [2021-11-23 17:35:29,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 60.8MB. Free memory was 42.0MB in the beginning and 41.9MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 693.42ms. Allocated memory is still 60.8MB. Free memory was 39.1MB in the beginning and 35.8MB in the end (delta: 3.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.61ms. Allocated memory is still 60.8MB. Free memory was 35.8MB in the beginning and 33.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.11ms. Allocated memory is still 60.8MB. Free memory was 33.2MB in the beginning and 30.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1340.93ms. Allocated memory was 60.8MB in the beginning and 81.8MB in the end (delta: 21.0MB). Free memory was 30.6MB in the beginning and 39.4MB in the end (delta: -8.8MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * TraceAbstraction took 974.22ms. Allocated memory is still 81.8MB. Free memory was 39.0MB in the beginning and 37.3MB in the end (delta: 1.7MB). Peak memory consumption was 1.8MB. 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 17:35:29,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb95b57b-4f8a-43e8-833e-e9ec9c5a77e7/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