./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan --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 f1439388ab0e0331a25110b61c93eea2b0d4bab5 .............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan --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 f1439388ab0e0331a25110b61c93eea2b0d4bab5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:05:59,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:59,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:59,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:59,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:59,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:59,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:59,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:59,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:59,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:59,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:59,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:59,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:59,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:59,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:59,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:59,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:59,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:59,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:59,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:59,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:59,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:59,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:59,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:59,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:59,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:59,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:59,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:59,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:59,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:59,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:59,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:59,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:59,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:59,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:59,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:59,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:59,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:59,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:59,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:59,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:59,498 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:05:59,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:59,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:59,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:59,538 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:59,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:59,539 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:59,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:59,540 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:59,540 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:59,540 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:59,541 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:59,541 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:59,542 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:59,542 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:59,542 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:59,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:59,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:05:59,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:59,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:05:59,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:59,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:59,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:59,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:59,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:05:59,545 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:05:59,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:59,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:59,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:59,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:59,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:59,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:59,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:59,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:59,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:59,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:59,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:59,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:59,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:59,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:59,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:59,550 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-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1439388ab0e0331a25110b61c93eea2b0d4bab5 [2020-11-22 13:05:59,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:59,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:59,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:59,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:59,862 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:59,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-11-22 13:05:59,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/4c747c947/d577e082db7f41048264f9a684edc348/FLAG5efc2d430 [2020-11-22 13:06:00,470 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:00,471 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-11-22 13:06:00,484 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/4c747c947/d577e082db7f41048264f9a684edc348/FLAG5efc2d430 [2020-11-22 13:06:00,825 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/4c747c947/d577e082db7f41048264f9a684edc348 [2020-11-22 13:06:00,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:00,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:00,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:00,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:00,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:00,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:00" (1/1) ... [2020-11-22 13:06:00,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228ea39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:00, skipping insertion in model container [2020-11-22 13:06:00,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:00" (1/1) ... [2020-11-22 13:06:00,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:00,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:01,116 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:01,118 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:01,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:01,165 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2020-11-22 13:06:01,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@94fd1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:01, skipping insertion in model container [2020-11-22 13:06:01,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:01,167 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-11-22 13:06:01,170 INFO L168 Benchmark]: Toolchain (without parser) took 337.78 ms. Allocated memory is still 81.8 MB. Free memory was 49.9 MB in the beginning and 60.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,172 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 81.8 MB. Free memory was 56.0 MB in the beginning and 56.0 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:01,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.50 ms. Allocated memory is still 81.8 MB. Free memory was 49.7 MB in the beginning and 60.5 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 81.8 MB. Free memory was 56.0 MB in the beginning and 56.0 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.50 ms. Allocated memory is still 81.8 MB. Free memory was 49.7 MB in the beginning and 60.5 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:06:03,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:03,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:03,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:03,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:03,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:03,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:03,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:03,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:03,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:03,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:03,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:03,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:03,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:03,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:03,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:03,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:03,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:03,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:03,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:03,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:03,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:03,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:03,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:03,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:03,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:03,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:03,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:03,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:03,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:03,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:03,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:03,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:03,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:03,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:03,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:03,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:03,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:03,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:03,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:03,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:03,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 13:06:03,590 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:03,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:03,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:03,592 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:03,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:03,593 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:03,593 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:03,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:03,594 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:03,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:03,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:03,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:03,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:03,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:03,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:03,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:03,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:03,598 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 13:06:03,598 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 13:06:03,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:03,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:03,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:03,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:03,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:03,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 13:06:03,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:03,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:03,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:03,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:03,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:03,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:03,601 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 13:06:03,602 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 13:06:03,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:03,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:03,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:03,603 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-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1439388ab0e0331a25110b61c93eea2b0d4bab5 [2020-11-22 13:06:03,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:03,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:03,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:03,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:03,989 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:03,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-11-22 13:06:04,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/ddd2cb6ed/e4dabb10198646d2819ca2d074b7178d/FLAG76b4b6cf2 [2020-11-22 13:06:04,665 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:04,667 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-11-22 13:06:04,675 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/ddd2cb6ed/e4dabb10198646d2819ca2d074b7178d/FLAG76b4b6cf2 [2020-11-22 13:06:05,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/data/ddd2cb6ed/e4dabb10198646d2819ca2d074b7178d [2020-11-22 13:06:05,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:05,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:05,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:05,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:05,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:05,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575bb0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05, skipping insertion in model container [2020-11-22 13:06:05,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:05,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:05,209 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:05,213 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:05,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:05,273 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-11-22 13:06:05,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:05,301 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:05,302 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:05,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:05,362 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:05,390 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:05,397 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:06:05,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:05,445 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:05,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05 WrapperNode [2020-11-22 13:06:05,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:05,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:05,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:05,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:05,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:05,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:05,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:05,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:05,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... [2020-11-22 13:06:05,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:05,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:05,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:05,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:05,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 13:06:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 13:06:05,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-11-22 13:06:05,620 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-11-22 13:06:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-11-22 13:06:05,620 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-11-22 13:06:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-22 13:06:05,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 13:06:05,621 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-22 13:06:05,621 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-22 13:06:05,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:06:05,621 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-11-22 13:06:05,621 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-11-22 13:06:05,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:05,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:05,622 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-11-22 13:06:05,622 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-11-22 13:06:05,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:06:05,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-22 13:06:06,465 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:06,465 INFO L298 CfgBuilder]: Removed 29 assume(true) statements. [2020-11-22 13:06:06,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:06 BoogieIcfgContainer [2020-11-22 13:06:06,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:06,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:06,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:06,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:06,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:05" (1/3) ... [2020-11-22 13:06:06,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f96523e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:06, skipping insertion in model container [2020-11-22 13:06:06,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:05" (2/3) ... [2020-11-22 13:06:06,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f96523e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:06, skipping insertion in model container [2020-11-22 13:06:06,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:06" (3/3) ... [2020-11-22 13:06:06,475 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-11-22 13:06:06,485 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:06,490 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 13:06:06,503 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:06:06,544 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:06,544 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:06,545 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:06,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:06,545 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:06,545 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:06,545 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:06,546 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-11-22 13:06:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-22 13:06:06,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:06,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:06,578 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 325126343, now seen corresponding path program 1 times [2020-11-22 13:06:06,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:06,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743366600] [2020-11-22 13:06:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-22 13:06:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:06,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743366600] [2020-11-22 13:06:06,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:06,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-22 13:06:06,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325214976] [2020-11-22 13:06:06,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:06:06,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:06:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:06,894 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 2 states. [2020-11-22 13:06:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:06,922 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2020-11-22 13:06:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:06:06,923 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-11-22 13:06:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:06,932 INFO L225 Difference]: With dead ends: 141 [2020-11-22 13:06:06,932 INFO L226 Difference]: Without dead ends: 76 [2020-11-22 13:06:06,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-22 13:06:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-22 13:06:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-22 13:06:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-11-22 13:06:06,976 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 30 [2020-11-22 13:06:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:06,977 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-11-22 13:06:06,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:06:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-11-22 13:06:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-22 13:06:06,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:06,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:07,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 13:06:07,196 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1026190921, now seen corresponding path program 1 times [2020-11-22 13:06:07,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:07,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426934892] [2020-11-22 13:06:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:07,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 13:06:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:07,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:07,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 13:06:07,378 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:06:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:07,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426934892] [2020-11-22 13:06:07,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:07,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-22 13:06:07,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259868887] [2020-11-22 13:06:07,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:06:07,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:07,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:06:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:06:07,418 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 5 states. [2020-11-22 13:06:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:07,463 INFO L93 Difference]: Finished difference Result 131 states and 160 transitions. [2020-11-22 13:06:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:06:07,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-11-22 13:06:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:07,469 INFO L225 Difference]: With dead ends: 131 [2020-11-22 13:06:07,471 INFO L226 Difference]: Without dead ends: 78 [2020-11-22 13:06:07,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:06:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-22 13:06:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-22 13:06:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-22 13:06:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2020-11-22 13:06:07,496 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 30 [2020-11-22 13:06:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:07,496 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2020-11-22 13:06:07,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:06:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2020-11-22 13:06:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-22 13:06:07,499 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:07,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:07,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 13:06:07,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -448564166, now seen corresponding path program 1 times [2020-11-22 13:06:07,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:07,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389840495] [2020-11-22 13:06:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:06:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:06:07,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:06:08,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389840495] [2020-11-22 13:06:08,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928501383] [2020-11-22 13:06:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-22 13:06:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:06:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:06:08,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:06:08,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831736421] [2020-11-22 13:06:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:08,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:06:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:06:08,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:06:08,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-22 13:06:08,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2020-11-22 13:06:08,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987232006] [2020-11-22 13:06:08,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:06:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:06:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:06:08,926 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 8 states. [2020-11-22 13:06:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:09,200 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2020-11-22 13:06:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:06:09,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-11-22 13:06:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:09,202 INFO L225 Difference]: With dead ends: 139 [2020-11-22 13:06:09,202 INFO L226 Difference]: Without dead ends: 80 [2020-11-22 13:06:09,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:06:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-22 13:06:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-22 13:06:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-22 13:06:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-11-22 13:06:09,217 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 42 [2020-11-22 13:06:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:09,218 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-11-22 13:06:09,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:06:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-11-22 13:06:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-22 13:06:09,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:09,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:09,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:06:09,838 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1006862077, now seen corresponding path program 1 times [2020-11-22 13:06:09,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:09,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581174750] [2020-11-22 13:06:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:06:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-22 13:06:10,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-22 13:06:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581174750] [2020-11-22 13:06:10,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:10,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2020-11-22 13:06:10,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609026351] [2020-11-22 13:06:10,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:06:10,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:06:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:06:10,224 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 9 states. [2020-11-22 13:06:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:10,446 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2020-11-22 13:06:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:06:10,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-11-22 13:06:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:10,448 INFO L225 Difference]: With dead ends: 139 [2020-11-22 13:06:10,449 INFO L226 Difference]: Without dead ends: 82 [2020-11-22 13:06:10,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:06:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-22 13:06:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-22 13:06:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-22 13:06:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2020-11-22 13:06:10,463 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 52 [2020-11-22 13:06:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:10,468 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2020-11-22 13:06:10,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:06:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2020-11-22 13:06:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-22 13:06:10,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:10,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:10,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-22 13:06:10,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash -363294050, now seen corresponding path program 1 times [2020-11-22 13:06:10,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:10,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711412277] [2020-11-22 13:06:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:06:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:06:10,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:06:11,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711412277] [2020-11-22 13:06:11,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:11,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2020-11-22 13:06:11,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727774026] [2020-11-22 13:06:11,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:06:11,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:06:11,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:06:11,129 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 9 states. [2020-11-22 13:06:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:11,589 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2020-11-22 13:06:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:06:11,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-11-22 13:06:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:11,592 INFO L225 Difference]: With dead ends: 134 [2020-11-22 13:06:11,592 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 13:06:11,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:06:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 13:06:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-22 13:06:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-22 13:06:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2020-11-22 13:06:11,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 65 [2020-11-22 13:06:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:11,606 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2020-11-22 13:06:11,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:06:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2020-11-22 13:06:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-22 13:06:11,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:11,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:11,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-22 13:06:11,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash -996061183, now seen corresponding path program 1 times [2020-11-22 13:06:11,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:11,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308743357] [2020-11-22 13:06:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:12,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:12,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:12,524 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-22 13:06:12,525 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:06:12,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-22 13:06:12,777 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,779 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,782 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,784 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,787 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,792 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,793 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,793 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,793 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,793 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,798 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,798 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:12 BoogieIcfgContainer [2020-11-22 13:06:12,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:12,855 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:12,855 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:12,855 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:12,858 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:06" (3/4) ... [2020-11-22 13:06:12,860 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:06:12,869 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,869 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,869 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,870 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,872 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,873 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,873 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,873 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,873 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,874 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,874 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,874 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:06:12,971 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_38e70df9-1bd2-43a2-8cfc-7611bb45cd77/bin/utaipan/witness.graphml [2020-11-22 13:06:12,972 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:12,974 INFO L168 Benchmark]: Toolchain (without parser) took 7946.20 ms. Allocated memory was 58.7 MB in the beginning and 121.6 MB in the end (delta: 62.9 MB). Free memory was 37.6 MB in the beginning and 67.1 MB in the end (delta: -29.5 MB). Peak memory consumption was 33.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,974 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 58.7 MB. Free memory is still 40.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:12,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.79 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 37.4 MB in the beginning and 65.2 MB in the end (delta: -27.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,975 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.56 ms. Allocated memory is still 83.9 MB. Free memory was 65.2 MB in the beginning and 63.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,976 INFO L168 Benchmark]: Boogie Preprocessor took 42.04 ms. Allocated memory is still 83.9 MB. Free memory was 63.3 MB in the beginning and 61.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,978 INFO L168 Benchmark]: RCFGBuilder took 931.53 ms. Allocated memory is still 83.9 MB. Free memory was 61.3 MB in the beginning and 49.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,978 INFO L168 Benchmark]: TraceAbstraction took 6385.29 ms. Allocated memory was 83.9 MB in the beginning and 121.6 MB in the end (delta: 37.7 MB). Free memory was 49.1 MB in the beginning and 74.5 MB in the end (delta: -25.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,979 INFO L168 Benchmark]: Witness Printer took 117.30 ms. Allocated memory is still 121.6 MB. Free memory was 74.5 MB in the beginning and 68.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:12,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 58.7 MB. Free memory is still 40.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 417.79 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 37.4 MB in the beginning and 65.2 MB in the end (delta: -27.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.56 ms. Allocated memory is still 83.9 MB. Free memory was 65.2 MB in the beginning and 63.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.04 ms. Allocated memory is still 83.9 MB. Free memory was 63.3 MB in the beginning and 61.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 931.53 ms. Allocated memory is still 83.9 MB. Free memory was 61.3 MB in the beginning and 49.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6385.29 ms. Allocated memory was 83.9 MB in the beginning and 121.6 MB in the end (delta: 37.7 MB). Free memory was 49.1 MB in the beginning and 74.5 MB in the end (delta: -25.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 117.30 ms. Allocated memory is still 121.6 MB. Free memory was 74.5 MB in the beginning and 68.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L98] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={1:0}, n={1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={1:0}, n={1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={1:0}, malloc(sizeof(struct node))={1:0}, n={1:0}] [L98] RET nondet_tree() [L76] CALL, EXPR min(t) VAL [n={1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={1:0}, n={1:0}, n->left={0:0}] [L40] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L40] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={1:0}, n={1:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={1:0}, n={1:0}, n->right={0:0}] [L41] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={1:0}, n={1:0}, n->right={0:0}] [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={1:0}, n={1:0}] [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) VAL [t={1:0}] [L71] COND FALSE !(!t) [L72] EXPR t->left VAL [t={1:0}, t={1:0}, t->left={0:0}] [L72] CALL, EXPR size(t->left) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->left) VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}] [L72] EXPR t->right VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}, t->right={0:0}] [L72] CALL, EXPR size(t->right) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={1:0}, t={1:0}, t->left={0:0}, t->right={0:0}] [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L10] COND FALSE !(!cond) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={3:0}, t={1:0}] [L60] COND FALSE !(!t) [L63] EXPR t->left VAL [\old(i)=1, a={3:0}, a={3:0}, i=1, t={1:0}, t={1:0}, t->left={0:0}] [L63] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={3:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=1, \result=1, a={3:0}, a={3:0}, i=1, t={0:0}, t={0:0}] [L63] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={3:0}, a={3:0}, i=1, t={1:0}, t={1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right VAL [\old(i)=1, a={3:0}, a={3:0}, i=2, t={1:0}, t={1:0}, t->right={0:0}] [L65] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={3:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=2, \result=2, a={3:0}, a={3:0}, i=2, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={3:0}, a={3:0}, i=2, t={1:0}, t={1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L65] i = tree_inorder(t->right, a, i) [L66] return i; VAL [\old(i)=1, \result=2, a={3:0}, a={3:0}, i=2, t={1:0}, t={1:0}] [L82] RET tree_inorder(t, x, n) [L83] x[0] [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_rec_incorrect.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 85 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 450 SDtfs, 148 SDslu, 1529 SDs, 0 SdLazy, 219 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 603 GetRequests, 569 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 592 ConstructedInterpolants, 0 QuantifiedInterpolants, 60718 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1067 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 168/180 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! Received shutdown request...