./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 0.2.0-7b2dab5 [2020-12-09 19:13:03,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:13:03,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:13:03,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:13:03,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:13:03,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:13:03,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:13:03,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:13:03,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:13:03,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:13:03,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:13:03,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:13:03,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:13:03,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:13:03,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:13:03,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:13:03,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:13:03,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:13:03,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:13:03,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:13:03,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:13:03,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:13:03,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:13:03,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:13:03,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:13:03,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:13:03,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:13:03,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:13:03,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:13:03,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:13:03,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:13:03,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:13:03,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:13:03,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:13:03,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:13:03,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:13:03,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:13:03,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:13:03,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:13:03,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:13:03,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:13:03,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:13:03,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:13:03,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:13:03,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:13:03,905 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:13:03,905 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:13:03,905 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:13:03,905 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:13:03,906 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:13:03,906 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:13:03,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:13:03,907 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:13:03,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:13:03,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:13:03,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:13:03,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:13:03,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:13:03,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:13:03,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:13:03,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:13:03,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:13:03,910 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_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1439388ab0e0331a25110b61c93eea2b0d4bab5 [2020-12-09 19:13:04,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:13:04,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:13:04,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:13:04,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:13:04,105 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:13:04,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-12-09 19:13:04,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/8f0660ad0/4d37745b01cc43b09b66bc2ae749ed74/FLAGc780eb04b [2020-12-09 19:13:04,527 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:13:04,528 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-12-09 19:13:04,533 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/8f0660ad0/4d37745b01cc43b09b66bc2ae749ed74/FLAGc780eb04b [2020-12-09 19:13:04,542 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/8f0660ad0/4d37745b01cc43b09b66bc2ae749ed74 [2020-12-09 19:13:04,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:13:04,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:13:04,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:13:04,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:13:04,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:13:04,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:13:04" (1/1) ... [2020-12-09 19:13:04,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c858ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:04, skipping insertion in model container [2020-12-09 19:13:04,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:13:04" (1/1) ... [2020-12-09 19:13:04,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:13:04,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:13:04,676 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2020-12-09 19:13:04,689 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:04,691 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:04,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:13:04,721 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) [2020-12-09 19:13:04,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d8ece6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:04, skipping insertion in model container [2020-12-09 19:13:04,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:13:04,722 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-12-09 19:13:04,723 INFO L168 Benchmark]: Toolchain (without parser) took 177.28 ms. Allocated memory is still 109.1 MB. Free memory was 71.8 MB in the beginning and 85.0 MB in the end (delta: -13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:04,724 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 109.1 MB. Free memory was 88.3 MB in the beginning and 88.2 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:13:04,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.34 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 85.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:04,726 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 109.1 MB. Free memory was 88.3 MB in the beginning and 88.2 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 175.34 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 85.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 12.6 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 0.2.0-7b2dab5 [2020-12-09 19:13:06,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:13:06,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:13:06,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:13:06,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:13:06,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:13:06,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:13:06,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:13:06,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:13:06,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:13:06,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:13:06,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:13:06,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:13:06,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:13:06,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:13:06,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:13:06,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:13:06,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:13:06,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:13:06,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:13:06,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:13:06,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:13:06,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:13:06,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:13:06,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:13:06,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:13:06,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:13:06,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:13:06,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:13:06,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:13:06,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:13:06,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:13:06,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:13:06,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:13:06,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:13:06,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:13:06,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:13:06,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:13:06,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:13:06,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:13:06,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:13:06,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 19:13:06,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:13:06,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:13:06,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:13:06,217 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:13:06,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:13:06,218 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:13:06,218 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:13:06,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:13:06,218 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:13:06,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:13:06,219 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:13:06,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:13:06,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:13:06,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:13:06,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:13:06,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:13:06,220 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:13:06,221 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 19:13:06,221 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 19:13:06,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:13:06,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:13:06,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:13:06,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:13:06,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:13:06,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 19:13:06,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:13:06,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:13:06,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:13:06,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:13:06,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:13:06,223 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 19:13:06,223 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 19:13:06,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:13:06,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:13:06,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:13:06,224 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_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1439388ab0e0331a25110b61c93eea2b0d4bab5 [2020-12-09 19:13:06,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:13:06,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:13:06,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:13:06,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:13:06,472 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:13:06,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-12-09 19:13:06,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/2bb2edcf1/f7232ffdbb3a4d1da6dceadfca453de7/FLAG90d3220c9 [2020-12-09 19:13:06,892 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:13:06,893 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2020-12-09 19:13:06,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/2bb2edcf1/f7232ffdbb3a4d1da6dceadfca453de7/FLAG90d3220c9 [2020-12-09 19:13:06,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/data/2bb2edcf1/f7232ffdbb3a4d1da6dceadfca453de7 [2020-12-09 19:13:06,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:13:06,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:13:06,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:13:06,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:13:06,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:13:06,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:13:06" (1/1) ... [2020-12-09 19:13:06,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2320d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:06, skipping insertion in model container [2020-12-09 19:13:06,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:13:06" (1/1) ... [2020-12-09 19:13:06,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:13:06,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:13:07,038 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2020-12-09 19:13:07,057 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:07,062 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:07,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:13:07,096 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-12-09 19:13:07,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:13:07,105 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2020-12-09 19:13:07,111 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:07,113 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:07,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:13:07,130 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:13:07,143 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2020-12-09 19:13:07,147 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:07,149 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 19:13:07,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:13:07,180 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:13:07,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07 WrapperNode [2020-12-09 19:13:07,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:13:07,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:13:07,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:13:07,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:13:07,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:13:07,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:13:07,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:13:07,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:13:07,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... [2020-12-09 19:13:07,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:13:07,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:13:07,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:13:07,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:13:07,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 19:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 19:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-12-09 19:13:07,331 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-12-09 19:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-12-09 19:13:07,331 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-12-09 19:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 19:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 19:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-09 19:13:07,332 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-09 19:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 19:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-12-09 19:13:07,332 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-12-09 19:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:13:07,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-12-09 19:13:07,332 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-12-09 19:13:07,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 19:13:07,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 19:13:07,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:13:07,768 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 19:13:07,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:13:07 BoogieIcfgContainer [2020-12-09 19:13:07,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:13:07,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:13:07,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:13:07,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:13:07,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:13:06" (1/3) ... [2020-12-09 19:13:07,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343bafcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:13:07, skipping insertion in model container [2020-12-09 19:13:07,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:13:07" (2/3) ... [2020-12-09 19:13:07,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343bafcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:13:07, skipping insertion in model container [2020-12-09 19:13:07,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:13:07" (3/3) ... [2020-12-09 19:13:07,777 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-12-09 19:13:07,788 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:13:07,791 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 19:13:07,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 19:13:07,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:13:07,821 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:13:07,822 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:13:07,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:13:07,822 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:13:07,822 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:13:07,822 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:13:07,822 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:13:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2020-12-09 19:13:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 19:13:07,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:13:07,843 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] [2020-12-09 19:13:07,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:13:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:13:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1095170897, now seen corresponding path program 1 times [2020-12-09 19:13:07,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:13:07,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967930074] [2020-12-09 19:13:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 19:13:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:13:08,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:13:08,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967930074] [2020-12-09 19:13:08,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:13:08,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:13:08,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017601616] [2020-12-09 19:13:08,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 19:13:08,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:13:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 19:13:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:13:08,083 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 2 states. [2020-12-09 19:13:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:13:08,106 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2020-12-09 19:13:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 19:13:08,107 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-09 19:13:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:13:08,114 INFO L225 Difference]: With dead ends: 137 [2020-12-09 19:13:08,114 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 19:13:08,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:13:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 19:13:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-09 19:13:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 19:13:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-12-09 19:13:08,153 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 30 [2020-12-09 19:13:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:13:08,154 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-12-09 19:13:08,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 19:13:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-12-09 19:13:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 19:13:08,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:13:08,157 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] [2020-12-09 19:13:08,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 19:13:08,358 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:13:08,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:13:08,359 INFO L82 PathProgramCache]: Analyzing trace with hash -394106319, now seen corresponding path program 1 times [2020-12-09 19:13:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:13:08,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211515320] [2020-12-09 19:13:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 19:13:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:13:08,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:13:08,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211515320] [2020-12-09 19:13:08,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:13:08,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:13:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647197867] [2020-12-09 19:13:08,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:13:08,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:13:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:13:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:13:08,523 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 5 states. [2020-12-09 19:13:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:13:08,551 INFO L93 Difference]: Finished difference Result 131 states and 160 transitions. [2020-12-09 19:13:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:13:08,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-09 19:13:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:13:08,554 INFO L225 Difference]: With dead ends: 131 [2020-12-09 19:13:08,555 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 19:13:08,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:13:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 19:13:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-09 19:13:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-09 19:13:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2020-12-09 19:13:08,565 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 30 [2020-12-09 19:13:08,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:13:08,565 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2020-12-09 19:13:08,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:13:08,565 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2020-12-09 19:13:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-09 19:13:08,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:13:08,566 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] [2020-12-09 19:13:08,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 19:13:08,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:13:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:13:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1904559170, now seen corresponding path program 1 times [2020-12-09 19:13:08,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:13:08,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022573882] [2020-12-09 19:13:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 19:13:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:13:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:13:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:13:09,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022573882] [2020-12-09 19:13:09,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371483884] [2020-12-09 19:13:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 19:13:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 19:13:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:13:09,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:13:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:13:09,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471505888] [2020-12-09 19:13:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:09,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 19:13:09,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:13:09,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:13:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:13:09,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 19:13:09,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2020-12-09 19:13:09,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246255281] [2020-12-09 19:13:09,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 19:13:09,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:13:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 19:13:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:13:09,737 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 8 states. [2020-12-09 19:13:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:13:09,855 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2020-12-09 19:13:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:13:09,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-09 19:13:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:13:09,858 INFO L225 Difference]: With dead ends: 139 [2020-12-09 19:13:09,858 INFO L226 Difference]: Without dead ends: 80 [2020-12-09 19:13:09,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-09 19:13:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-09 19:13:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-09 19:13:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 19:13:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-12-09 19:13:09,866 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 42 [2020-12-09 19:13:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:13:09,866 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-12-09 19:13:09,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 19:13:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-12-09 19:13:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 19:13:09,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:13:09,868 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] [2020-12-09 19:13:10,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 19:13:10,472 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:13:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:13:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1838253317, now seen corresponding path program 1 times [2020-12-09 19:13:10,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:13:10,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020532687] [2020-12-09 19:13:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 19:13:10,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 19:13:10,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:13:10,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020532687] [2020-12-09 19:13:10,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:13:10,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 19:13:10,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125071851] [2020-12-09 19:13:10,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 19:13:10,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:13:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 19:13:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:13:10,637 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 8 states. [2020-12-09 19:13:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:13:10,739 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2020-12-09 19:13:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 19:13:10,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-12-09 19:13:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:13:10,741 INFO L225 Difference]: With dead ends: 139 [2020-12-09 19:13:10,741 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 19:13:10,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 19:13:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 19:13:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-09 19:13:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-09 19:13:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2020-12-09 19:13:10,749 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 52 [2020-12-09 19:13:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:13:10,750 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2020-12-09 19:13:10,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 19:13:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2020-12-09 19:13:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-09 19:13:10,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:13:10,752 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] [2020-12-09 19:13:10,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 19:13:10,953 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:13:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:13:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1543692906, now seen corresponding path program 1 times [2020-12-09 19:13:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:13:10,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641655597] [2020-12-09 19:13:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:13:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 19:13:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:13:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-09 19:13:11,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:13:11,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641655597] [2020-12-09 19:13:11,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:13:11,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 19:13:11,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58625756] [2020-12-09 19:13:11,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 19:13:11,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:13:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 19:13:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:13:11,196 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 8 states. [2020-12-09 19:13:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:13:11,502 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2020-12-09 19:13:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 19:13:11,506 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-12-09 19:13:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:13:11,507 INFO L225 Difference]: With dead ends: 134 [2020-12-09 19:13:11,508 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 19:13:11,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 19:13:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 19:13:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-09 19:13:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-09 19:13:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2020-12-09 19:13:11,516 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 65 [2020-12-09 19:13:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:13:11,516 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2020-12-09 19:13:11,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 19:13:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2020-12-09 19:13:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 19:13:11,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:13:11,519 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] [2020-12-09 19:13:11,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 19:13:11,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:13:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:13:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1767582969, now seen corresponding path program 1 times [2020-12-09 19:13:11,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:13:11,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034129898] [2020-12-09 19:13:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/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 [2020-12-09 19:13:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:13:11,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:13:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:13:12,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:13:12,210 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 19:13:12,210 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:13:12,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 19:13:12,461 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,462 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,462 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,462 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,467 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,467 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,467 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,467 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,468 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,468 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,468 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,468 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:13:12 BoogieIcfgContainer [2020-12-09 19:13:12,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:13:12,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:13:12,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:13:12,496 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:13:12,496 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:13:07" (3/4) ... [2020-12-09 19:13:12,498 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 19:13:12,501 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,502 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,502 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,502 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,503 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,503 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,503 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,503 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,503 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,503 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,504 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,504 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 19:13:12,545 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e63858e5-8b7e-43a8-a8ca-6ce46fadac1c/bin/utaipan/witness.graphml [2020-12-09 19:13:12,545 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:13:12,546 INFO L168 Benchmark]: Toolchain (without parser) took 5634.71 ms. Allocated memory was 48.2 MB in the beginning and 98.6 MB in the end (delta: 50.3 MB). Free memory was 24.5 MB in the beginning and 26.9 MB in the end (delta: -2.4 MB). Peak memory consumption was 46.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:12,546 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 48.2 MB. Free memory is still 31.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:13:12,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.48 ms. Allocated memory was 48.2 MB in the beginning and 67.1 MB in the end (delta: 18.9 MB). Free memory was 24.3 MB in the beginning and 45.9 MB in the end (delta: -21.6 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:12,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.82 ms. Allocated memory is still 67.1 MB. Free memory was 45.9 MB in the beginning and 44.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:12,548 INFO L168 Benchmark]: Boogie Preprocessor took 38.68 ms. Allocated memory is still 67.1 MB. Free memory was 44.1 MB in the beginning and 42.2 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:13:12,548 INFO L168 Benchmark]: RCFGBuilder took 502.68 ms. Allocated memory is still 67.1 MB. Free memory was 42.2 MB in the beginning and 42.3 MB in the end (delta: -88.9 kB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:12,548 INFO L168 Benchmark]: TraceAbstraction took 4724.21 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 41.7 MB in the beginning and 34.3 MB in the end (delta: 7.4 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:12,549 INFO L168 Benchmark]: Witness Printer took 49.35 ms. Allocated memory is still 98.6 MB. Free memory was 34.3 MB in the beginning and 26.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:13:12,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 48.2 MB. Free memory is still 31.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.48 ms. Allocated memory was 48.2 MB in the beginning and 67.1 MB in the end (delta: 18.9 MB). Free memory was 24.3 MB in the beginning and 45.9 MB in the end (delta: -21.6 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.82 ms. Allocated memory is still 67.1 MB. Free memory was 45.9 MB in the beginning and 44.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.68 ms. Allocated memory is still 67.1 MB. Free memory was 44.1 MB in the beginning and 42.2 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 502.68 ms. Allocated memory is still 67.1 MB. Free memory was 42.2 MB in the beginning and 42.3 MB in the end (delta: -88.9 kB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4724.21 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 41.7 MB in the beginning and 34.3 MB in the end (delta: 7.4 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. * Witness Printer took 49.35 ms. Allocated memory is still 98.6 MB. Free memory was 34.3 MB in the beginning and 26.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 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: 16]: a call to reach_error is reachable a call to reach_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={2:0}, t={1:0}] [L60] COND FALSE !(!t) [L63] EXPR t->left VAL [\old(i)=1, a={2:0}, a={2:0}, 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={2:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=1, \result=1, a={2:0}, a={2:0}, i=1, t={0:0}, t={0:0}] [L63] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={2:0}, a={2:0}, 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={2:0}, a={2:0}, 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={2:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=2, \result=2, a={2:0}, a={2:0}, i=2, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={2:0}, a={2:0}, 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={2:0}, a={2:0}, i=2, t={1:0}, t={1:0}] [L82] RET tree_inorder(t, x, n) [L83] x[0] [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 81 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 450 SDtfs, 134 SDslu, 1608 SDs, 0 SdLazy, 226 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 430 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=5, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 46738 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1067 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 114/126 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...