./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8 --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 997512b29ff7fdf1190aebf9d039045a1841d533 .............................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8 --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 997512b29ff7fdf1190aebf9d039045a1841d533 .............................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:44:58,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:44:58,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:44:58,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:44:58,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:44:58,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:44:58,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:44:58,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:44:58,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:44:58,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:44:58,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:44:58,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:44:58,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:44:58,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:44:58,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:44:58,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:44:58,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:44:58,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:44:58,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:44:58,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:44:58,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:44:58,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:44:58,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:44:58,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:44:58,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:44:58,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:44:58,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:44:58,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:44:58,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:44:58,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:44:58,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:44:58,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:44:58,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:44:58,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:44:58,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:44:58,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:44:58,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:44:58,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:44:58,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:44:58,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:44:58,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:44:58,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:44:58,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:44:58,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:44:58,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:44:58,651 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:44:58,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:44:58,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:44:58,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:44:58,652 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:44:58,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:44:58,655 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:44:58,656 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:44:58,656 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:44:58,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:44:58,656 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:44:58,657 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:44:58,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:44:58,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:44:58,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:44:58,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:44:58,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:44:58,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:44:58,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:44:58,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:44:58,660 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:44:58,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:44:58,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:44:58,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:44:58,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:44:58,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:44:58,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:44:58,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:58,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:44:58,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:44:58,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:44:58,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:44:58,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:44:58,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:44:58,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:44:58,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:44:58,666 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_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 997512b29ff7fdf1190aebf9d039045a1841d533 [2021-10-13 06:44:58,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:44:58,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:44:58,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:44:58,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:44:58,944 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:44:58,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-10-13 06:44:59,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/a70e6369b/3bf5191f5e5f493bbfe16dd4ff039792/FLAG245f73a3a [2021-10-13 06:44:59,557 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:44:59,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-10-13 06:44:59,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/a70e6369b/3bf5191f5e5f493bbfe16dd4ff039792/FLAG245f73a3a [2021-10-13 06:44:59,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/a70e6369b/3bf5191f5e5f493bbfe16dd4ff039792 [2021-10-13 06:44:59,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:44:59,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:44:59,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:59,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:44:59,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:44:59,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:59" (1/1) ... [2021-10-13 06:44:59,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a37bebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:59, skipping insertion in model container [2021-10-13 06:44:59,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:59" (1/1) ... [2021-10-13 06:44:59,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:44:59,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:45:00,372 WARN L228 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_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-10-13 06:45:00,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:00,389 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:45:00,464 WARN L228 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_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-10-13 06:45:00,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:00,498 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:45:00,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00 WrapperNode [2021-10-13 06:45:00,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:00,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:00,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:45:00,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:45:00,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:00,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:45:00,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:45:00,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:45:00,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:45:00,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:45:00,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:45:00,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:45:00,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (1/1) ... [2021-10-13 06:45:00,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:00,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:00,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:45:00,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:45:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:45:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:45:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:45:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:45:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:45:00,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:45:01,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:45:01,548 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-13 06:45:01,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:01 BoogieIcfgContainer [2021-10-13 06:45:01,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:45:01,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:45:01,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:45:01,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:45:01,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:44:59" (1/3) ... [2021-10-13 06:45:01,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9e5803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:01, skipping insertion in model container [2021-10-13 06:45:01,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:00" (2/3) ... [2021-10-13 06:45:01,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9e5803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:01, skipping insertion in model container [2021-10-13 06:45:01,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:01" (3/3) ... [2021-10-13 06:45:01,560 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2021-10-13 06:45:01,571 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:45:01,572 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:45:01,616 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:45:01,622 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, mConcurrency=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 [2021-10-13 06:45:01,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:45:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 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) [2021-10-13 06:45:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 06:45:01,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:01,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:01,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:01,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1310243095, now seen corresponding path program 1 times [2021-10-13 06:45:01,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:45:01,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645022436] [2021-10-13 06:45:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:01,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:45:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:01,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:45:01,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645022436] [2021-10-13 06:45:01,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645022436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:01,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:01,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:45:01,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192815405] [2021-10-13 06:45:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:45:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:45:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:45:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:45:01,832 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 06:45:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:01,847 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2021-10-13 06:45:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:45:01,848 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-10-13 06:45:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:01,855 INFO L225 Difference]: With dead ends: 45 [2021-10-13 06:45:01,856 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 06:45:01,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:45:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 06:45:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 06:45:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2021-10-13 06:45:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-13 06:45:01,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2021-10-13 06:45:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:01,886 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-13 06:45:01,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-10-13 06:45:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-13 06:45:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:45:01,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:01,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:01,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:45:01,888 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1889499438, now seen corresponding path program 1 times [2021-10-13 06:45:01,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:45:01,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014325220] [2021-10-13 06:45:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:01,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:45:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:01,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:45:01,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014325220] [2021-10-13 06:45:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014325220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:01,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 06:45:01,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079434195] [2021-10-13 06:45:01,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:45:01,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:45:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:45:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:45:01,984 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-13 06:45:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:02,047 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-10-13 06:45:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:45:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2021-10-13 06:45:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:02,048 INFO L225 Difference]: With dead ends: 25 [2021-10-13 06:45:02,048 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 06:45:02,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:45:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 06:45:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-10-13 06:45:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-10-13 06:45:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-10-13 06:45:02,054 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-10-13 06:45:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:02,054 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-10-13 06:45:02,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-10-13 06:45:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-10-13 06:45:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:45:02,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:02,056 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:02,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:45:02,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 241183453, now seen corresponding path program 1 times [2021-10-13 06:45:02,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:45:02,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398348146] [2021-10-13 06:45:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:02,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:45:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:02,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:45:02,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398348146] [2021-10-13 06:45:02,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398348146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:45:02,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318702471] [2021-10-13 06:45:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:02,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:02,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:02,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:02,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:45:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 06:45:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:02,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:45:02,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:45:02,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 06:45:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 06:45:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:02,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:02,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-13 06:45:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:02,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318702471] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:02,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168941570] [2021-10-13 06:45:02,641 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 06:45:02,641 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:45:02,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:45:02,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:45:02,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:45:02,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,686 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:45:02,687 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,687 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 06:45:02,688 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:45:02,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:45:02,691 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-13 06:45:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:45:02,713 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:45:02,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:45:02,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:45:02,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:45:02,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,737 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,739 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-13 06:45:02,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:45:02,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:119 [2021-10-13 06:45:02,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:02,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:02,969 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_49| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) 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.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) 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:608) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-13 06:45:02,973 INFO L168 Benchmark]: Toolchain (without parser) took 3091.76 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 76.2 MB in the beginning and 71.7 MB in the end (delta: 4.5 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:02,973 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory was 66.5 MB in the beginning and 66.5 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:45:02,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.70 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 77.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:02,974 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.58 ms. Allocated memory is still 111.1 MB. Free memory was 77.5 MB in the beginning and 75.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:02,975 INFO L168 Benchmark]: Boogie Preprocessor took 60.12 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 73.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:02,976 INFO L168 Benchmark]: RCFGBuilder took 911.83 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 73.3 MB in the beginning and 100.5 MB in the end (delta: -27.2 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:02,976 INFO L168 Benchmark]: TraceAbstraction took 1419.31 ms. Allocated memory is still 134.2 MB. Free memory was 99.9 MB in the beginning and 71.7 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:02,979 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory was 66.5 MB in the beginning and 66.5 MB in the end (delta: 54.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 607.70 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 77.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.58 ms. Allocated memory is still 111.1 MB. Free memory was 77.5 MB in the beginning and 75.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.12 ms. Allocated memory is still 111.1 MB. Free memory was 75.4 MB in the beginning and 73.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 911.83 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 73.3 MB in the beginning and 100.5 MB in the end (delta: -27.2 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1419.31 ms. Allocated memory is still 134.2 MB. Free memory was 99.9 MB in the beginning and 71.7 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_49| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_49|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:45:03,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:45:05,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:45:05,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:45:05,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:45:05,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:45:05,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:45:05,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:45:05,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:45:05,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:45:05,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:45:05,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:45:05,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:45:05,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:45:05,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:45:05,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:45:05,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:45:05,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:45:05,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:45:05,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:45:05,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:45:05,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:45:05,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:45:05,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:45:05,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:45:05,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:45:05,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:45:05,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:45:05,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:45:05,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:45:05,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:45:05,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:45:05,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:45:05,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:45:05,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:45:05,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:45:05,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:45:05,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:45:05,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:45:05,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:45:05,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:45:05,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:45:05,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:45:05,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:45:05,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:45:05,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:45:05,578 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:45:05,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:45:05,579 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:45:05,579 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:45:05,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:45:05,580 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:45:05,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:45:05,582 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:45:05,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:45:05,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:45:05,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:45:05,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:45:05,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:45:05,583 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:45:05,584 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:45:05,584 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:45:05,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:45:05,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:45:05,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:45:05,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:45:05,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:45:05,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:45:05,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:45:05,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:05,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:45:05,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:45:05,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:45:05,588 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:45:05,588 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:05,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:45:05,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:45:05,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:45:05,589 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_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 997512b29ff7fdf1190aebf9d039045a1841d533 [2021-10-13 06:45:05,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:45:06,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:45:06,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:45:06,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:45:06,023 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:45:06,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-10-13 06:45:06,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/046d0af40/cf76f95bc979425da3cb58436b4949fe/FLAGdb16e179b [2021-10-13 06:45:06,734 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:45:06,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-10-13 06:45:06,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/046d0af40/cf76f95bc979425da3cb58436b4949fe/FLAGdb16e179b [2021-10-13 06:45:07,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/data/046d0af40/cf76f95bc979425da3cb58436b4949fe [2021-10-13 06:45:07,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:45:07,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:45:07,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:07,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:45:07,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:45:07,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ed46f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07, skipping insertion in model container [2021-10-13 06:45:07,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:45:07,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:45:07,449 WARN L228 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_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-10-13 06:45:07,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:07,466 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:45:07,511 WARN L228 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_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-10-13 06:45:07,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:07,549 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:45:07,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07 WrapperNode [2021-10-13 06:45:07,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:07,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:07,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:45:07,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:45:07,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:07,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:45:07,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:45:07,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:45:07,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:45:07,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:45:07,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:45:07,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:45:07,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:07,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:45:07,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:45:07,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:45:07,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:45:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:45:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:45:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:45:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:45:07,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:45:07,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:45:07,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:45:07,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:45:08,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:45:08,536 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-13 06:45:08,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:08 BoogieIcfgContainer [2021-10-13 06:45:08,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:45:08,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:45:08,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:45:08,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:45:08,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:45:07" (1/3) ... [2021-10-13 06:45:08,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a3c77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:08, skipping insertion in model container [2021-10-13 06:45:08,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (2/3) ... [2021-10-13 06:45:08,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a3c77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:08, skipping insertion in model container [2021-10-13 06:45:08,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:08" (3/3) ... [2021-10-13 06:45:08,546 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2021-10-13 06:45:08,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:45:08,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:45:08,616 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:45:08,623 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, mConcurrency=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 [2021-10-13 06:45:08,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:45:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 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) [2021-10-13 06:45:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 06:45:08,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:08,665 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:08,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2102156727, now seen corresponding path program 1 times [2021-10-13 06:45:08,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:08,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010165792] [2021-10-13 06:45:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:08,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:08,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:08,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:45:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:45:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:09,047 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-13 06:45:09,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 7 [2021-10-13 06:45:09,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 06:45:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:09,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:09,191 INFO L354 Elim1Store]: treesize reduction 28, result has 22.2 percent of original size [2021-10-13 06:45:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2021-10-13 06:45:09,216 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-10-13 06:45:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-10-13 06:45:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:09,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:09,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010165792] [2021-10-13 06:45:09,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010165792] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:09,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:09,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 06:45:09,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613050727] [2021-10-13 06:45:09,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:45:09,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:45:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:45:09,289 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 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) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-10-13 06:45:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:09,995 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2021-10-13 06:45:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:45:09,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-10-13 06:45:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:10,006 INFO L225 Difference]: With dead ends: 89 [2021-10-13 06:45:10,006 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 06:45:10,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:45:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 06:45:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-10-13 06:45:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-10-13 06:45:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-13 06:45:10,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2021-10-13 06:45:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:10,041 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-13 06:45:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-10-13 06:45:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-13 06:45:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 06:45:10,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:10,042 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:10,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 06:45:10,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:10,254 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash 437717459, now seen corresponding path program 1 times [2021-10-13 06:45:10,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:10,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90378328] [2021-10-13 06:45:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:10,256 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:10,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:10,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:45:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:45:10,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:10,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 06:45:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 06:45:10,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-13 06:45:10,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 06:45:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:10,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:10,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-13 06:45:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:10,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:10,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90378328] [2021-10-13 06:45:10,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90378328] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:10,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052892491] [2021-10-13 06:45:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:10,710 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:10,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:10,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 06:45:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:45:10,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:10,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:45:10,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:45:11,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 06:45:11,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 06:45:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:11,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-13 06:45:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052892491] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:11,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314426076] [2021-10-13 06:45:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:11,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:11,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:11,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 06:45:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:45:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:11,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:45:11,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:45:11,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 06:45:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-13 06:45:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-13 06:45:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314426076] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:11,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:45:11,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 6, 5] total 8 [2021-10-13 06:45:11,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974897011] [2021-10-13 06:45:11,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:45:11,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:45:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:45:11,599 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-10-13 06:45:11,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:11,827 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-10-13 06:45:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:45:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 12 [2021-10-13 06:45:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:11,829 INFO L225 Difference]: With dead ends: 31 [2021-10-13 06:45:11,829 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 06:45:11,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:45:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 06:45:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-13 06:45:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-10-13 06:45:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-13 06:45:11,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-10-13 06:45:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:11,833 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-13 06:45:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-10-13 06:45:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-13 06:45:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 06:45:11,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:11,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:11,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-10-13 06:45:12,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:12,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:12,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:12,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1803058100, now seen corresponding path program 1 times [2021-10-13 06:45:12,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:12,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988156442] [2021-10-13 06:45:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:12,437 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:12,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:12,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:12,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:45:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:45:12,583 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 06:45:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:45:12,663 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 06:45:12,663 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 06:45:12,664 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:45:12,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:12,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:12,878 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:45:12,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:45:12 BoogieIcfgContainer [2021-10-13 06:45:12,900 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:45:12,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:45:12,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:45:12,901 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:45:12,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:08" (3/4) ... [2021-10-13 06:45:12,903 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 06:45:12,969 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:45:12,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:45:12,970 INFO L168 Benchmark]: Toolchain (without parser) took 5891.94 ms. Allocated memory was 58.7 MB in the beginning and 100.7 MB in the end (delta: 41.9 MB). Free memory was 34.8 MB in the beginning and 52.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,971 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 38.4 MB in the end (delta: 44.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:45:12,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 470.66 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 34.6 MB in the beginning and 57.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.90 ms. Allocated memory is still 83.9 MB. Free memory was 57.1 MB in the beginning and 54.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,973 INFO L168 Benchmark]: Boogie Preprocessor took 56.49 ms. Allocated memory is still 83.9 MB. Free memory was 54.7 MB in the beginning and 52.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,974 INFO L168 Benchmark]: RCFGBuilder took 872.40 ms. Allocated memory is still 83.9 MB. Free memory was 52.3 MB in the beginning and 50.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,975 INFO L168 Benchmark]: TraceAbstraction took 4360.88 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.6 MB in the beginning and 54.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,975 INFO L168 Benchmark]: Witness Printer took 68.43 ms. Allocated memory is still 100.7 MB. Free memory was 54.3 MB in the beginning and 52.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:12,979 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 58.7 MB. Free memory was 38.5 MB in the beginning and 38.4 MB in the end (delta: 44.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 470.66 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 34.6 MB in the beginning and 57.1 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.90 ms. Allocated memory is still 83.9 MB. Free memory was 57.1 MB in the beginning and 54.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.49 ms. Allocated memory is still 83.9 MB. Free memory was 54.7 MB in the beginning and 52.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 872.40 ms. Allocated memory is still 83.9 MB. Free memory was 52.3 MB in the beginning and 50.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4360.88 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 49.6 MB in the beginning and 54.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Witness Printer took 68.43 ms. Allocated memory is still 100.7 MB. Free memory was 54.3 MB in the beginning and 52.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] a->h = 2 [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) [L604] COND FALSE !(t == 0) [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a [L611] COND TRUE p!=0 [L612] EXPR p->h [L612] COND TRUE p->h != 2 [L613] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4265.7ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 29.1ms, AutomataDifference: 966.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 54 SDslu, 119 SDs, 0 SdLazy, 77 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 741.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 200.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 60.8ms SsaConstructionTime, 173.0ms SatisfiabilityAnalysisTime, 1411.8ms InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 568 SizeOfPredicates, 18 NumberOfNonLiveVariables, 183 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 06:45:13,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb2fe3b2-8e1d-489b-87ba-36daa26bdfdd/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...