./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE --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 5a7a61549e909154c33d5cf68876338c8745b83dde5aedff258c17f34600afc7 .............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE --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 5a7a61549e909154c33d5cf68876338c8745b83dde5aedff258c17f34600afc7 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 09:59:04,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:59:04,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:59:04,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:59:04,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:59:04,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:59:04,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:59:04,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:59:04,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:59:04,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:59:04,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:59:04,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:59:04,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:59:04,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:59:04,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:59:04,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:59:04,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:59:04,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:59:04,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:59:04,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:59:04,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:59:04,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:59:04,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:59:04,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:59:04,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:59:04,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:59:04,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:59:04,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:59:04,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:59:04,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:59:04,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:59:04,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:59:04,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:59:04,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:59:04,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:59:04,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:59:04,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:59:04,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:59:04,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:59:04,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:59:04,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:59:04,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 09:59:04,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:59:04,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:59:04,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:59:04,860 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:59:04,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:59:04,861 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:59:04,861 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 09:59:04,861 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:59:04,862 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:59:04,862 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 09:59:04,863 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 09:59:04,863 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:59:04,863 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 09:59:04,864 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 09:59:04,864 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 09:59:04,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:59:04,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:59:04,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 09:59:04,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:59:04,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:59:04,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:59:04,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:59:04,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:59:04,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:59:04,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:59:04,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:59:04,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:59:04,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:59:04,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:59:04,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:59:04,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:59:04,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:59:04,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:59:04,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:59:04,871 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 09:59:04,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 09:59:04,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:59:04,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:59:04,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:59:04,872 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a7a61549e909154c33d5cf68876338c8745b83dde5aedff258c17f34600afc7 [2021-10-24 09:59:05,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:59:05,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:59:05,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:59:05,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:59:05,236 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:59:05,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2021-10-24 09:59:05,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/811a758a8/d75ada34cd784abe8d6dc1cb677c4034/FLAG601c9cd97 [2021-10-24 09:59:05,809 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:59:05,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2021-10-24 09:59:05,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/811a758a8/d75ada34cd784abe8d6dc1cb677c4034/FLAG601c9cd97 [2021-10-24 09:59:06,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/811a758a8/d75ada34cd784abe8d6dc1cb677c4034 [2021-10-24 09:59:06,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:59:06,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:59:06,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:59:06,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:59:06,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:59:06,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:59:06" (1/1) ... [2021-10-24 09:59:06,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c55be13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:06, skipping insertion in model container [2021-10-24 09:59:06,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:59:06" (1/1) ... [2021-10-24 09:59:06,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:59:06,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:59:06,394 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2021-10-24 09:59:06,411 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:06,413 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:06,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:59:06,453 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) [2021-10-24 09:59:06,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d1e69c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:06, skipping insertion in model container [2021-10-24 09:59:06,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:59:06,458 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 09:59:06,460 INFO L168 Benchmark]: Toolchain (without parser) took 290.85 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 53.6 MB in the beginning and 83.5 MB in the end (delta: -29.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:06,461 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 67.2 MB in the beginning and 67.2 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:59:06,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.45 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 53.4 MB in the beginning and 83.5 MB in the end (delta: -30.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:06,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 67.2 MB in the beginning and 67.2 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.45 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 53.4 MB in the beginning and 83.5 MB in the end (delta: -30.1 MB). Peak memory consumption was 10.5 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 0.2.1-dev-e943c26 [2021-10-24 09:59:08,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 09:59:08,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 09:59:09,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 09:59:09,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 09:59:09,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 09:59:09,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 09:59:09,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 09:59:09,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 09:59:09,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 09:59:09,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 09:59:09,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 09:59:09,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 09:59:09,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 09:59:09,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 09:59:09,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 09:59:09,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 09:59:09,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 09:59:09,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 09:59:09,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 09:59:09,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 09:59:09,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 09:59:09,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 09:59:09,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 09:59:09,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 09:59:09,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 09:59:09,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 09:59:09,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 09:59:09,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 09:59:09,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 09:59:09,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 09:59:09,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 09:59:09,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 09:59:09,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 09:59:09,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 09:59:09,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 09:59:09,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 09:59:09,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 09:59:09,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 09:59:09,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 09:59:09,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 09:59:09,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 09:59:09,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 09:59:09,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 09:59:09,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 09:59:09,130 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 09:59:09,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 09:59:09,131 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 09:59:09,131 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 09:59:09,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 09:59:09,132 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 09:59:09,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 09:59:09,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 09:59:09,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 09:59:09,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 09:59:09,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 09:59:09,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 09:59:09,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 09:59:09,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 09:59:09,135 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 09:59:09,136 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 09:59:09,136 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 09:59:09,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 09:59:09,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 09:59:09,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 09:59:09,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 09:59:09,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 09:59:09,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 09:59:09,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:59:09,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 09:59:09,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 09:59:09,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 09:59:09,139 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 09:59:09,139 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 09:59:09,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 09:59:09,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 09:59:09,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 09:59:09,140 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a7a61549e909154c33d5cf68876338c8745b83dde5aedff258c17f34600afc7 [2021-10-24 09:59:09,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 09:59:09,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 09:59:09,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 09:59:09,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 09:59:09,578 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 09:59:09,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2021-10-24 09:59:09,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/6c4303cf0/a201a0451b034839bf136cdee909c7b4/FLAG7ec7589a8 [2021-10-24 09:59:10,231 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 09:59:10,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c [2021-10-24 09:59:10,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/6c4303cf0/a201a0451b034839bf136cdee909c7b4/FLAG7ec7589a8 [2021-10-24 09:59:10,589 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/data/6c4303cf0/a201a0451b034839bf136cdee909c7b4 [2021-10-24 09:59:10,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 09:59:10,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 09:59:10,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 09:59:10,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 09:59:10,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 09:59:10,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:59:10" (1/1) ... [2021-10-24 09:59:10,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32318d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:10, skipping insertion in model container [2021-10-24 09:59:10,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:59:10" (1/1) ... [2021-10-24 09:59:10,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 09:59:10,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:59:10,800 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2021-10-24 09:59:10,817 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:10,820 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:10,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:59:10,861 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 09:59:10,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 09:59:10,873 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2021-10-24 09:59:10,880 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:10,883 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:10,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:59:10,915 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 09:59:10,963 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/sv-benchmarks/c/verifythis/tree_del_rec_incorrect.c[618,631] [2021-10-24 09:59:10,981 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:10,987 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-24 09:59:11,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 09:59:11,053 INFO L208 MainTranslator]: Completed translation [2021-10-24 09:59:11,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11 WrapperNode [2021-10-24 09:59:11,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 09:59:11,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 09:59:11,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 09:59:11,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 09:59:11,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 09:59:11,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 09:59:11,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 09:59:11,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 09:59:11,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 09:59:11,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 09:59:11,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 09:59:11,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 09:59:11,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (1/1) ... [2021-10-24 09:59:11,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 09:59:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:59:11,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 09:59:11,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 09:59:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 09:59:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 09:59:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 09:59:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-24 09:59:11,350 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-24 09:59:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-24 09:59:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-24 09:59:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 09:59:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 09:59:11,351 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-24 09:59:11,352 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-24 09:59:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 09:59:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-24 09:59:11,352 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-24 09:59:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 09:59:11,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 09:59:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-24 09:59:11,353 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-24 09:59:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 09:59:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 09:59:12,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 09:59:12,163 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-24 09:59:12,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:59:12 BoogieIcfgContainer [2021-10-24 09:59:12,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 09:59:12,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 09:59:12,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 09:59:12,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 09:59:12,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:59:10" (1/3) ... [2021-10-24 09:59:12,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560f8508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:59:12, skipping insertion in model container [2021-10-24 09:59:12,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:59:11" (2/3) ... [2021-10-24 09:59:12,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560f8508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:59:12, skipping insertion in model container [2021-10-24 09:59:12,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:59:12" (3/3) ... [2021-10-24 09:59:12,183 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2021-10-24 09:59:12,190 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 09:59:12,191 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-24 09:59:12,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 09:59:12,274 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 09:59:12,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-24 09:59:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-10-24 09:59:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 09:59:12,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:59:12,328 INFO L512 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] [2021-10-24 09:59:12,328 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-24 09:59:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:59:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1095170897, now seen corresponding path program 1 times [2021-10-24 09:59:12,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:59:12,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267965501] [2021-10-24 09:59:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:12,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:59:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:59:12,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:59:12,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 09:59:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:12,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-24 09:59:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:59:12,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:59:12,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:59:12,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267965501] [2021-10-24 09:59:12,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267965501] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:59:12,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:59:12,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 09:59:12,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841960816] [2021-10-24 09:59:12,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 09:59:12,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:59:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 09:59:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:59:12,839 INFO L87 Difference]: Start difference. First operand has 81 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-24 09:59:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:59:12,870 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2021-10-24 09:59:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 09:59:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2021-10-24 09:59:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:59:12,882 INFO L225 Difference]: With dead ends: 137 [2021-10-24 09:59:12,883 INFO L226 Difference]: Without dead ends: 76 [2021-10-24 09:59:12,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 09:59:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-24 09:59:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-24 09:59:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.196078431372549) internal successors, (61), 54 states have internal predecessors, (61), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-10-24 09:59:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2021-10-24 09:59:12,933 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 30 [2021-10-24 09:59:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:59:12,935 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2021-10-24 09:59:12,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-24 09:59:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2021-10-24 09:59:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 09:59:12,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:59:12,939 INFO L512 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] [2021-10-24 09:59:12,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 09:59:13,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:59:13,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-24 09:59:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:59:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -394106319, now seen corresponding path program 1 times [2021-10-24 09:59:13,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:59:13,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400479517] [2021-10-24 09:59:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:13,155 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:59:13,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:59:13,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:59:13,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 09:59:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 09:59:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:59:13,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 09:59:13,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:59:13,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400479517] [2021-10-24 09:59:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400479517] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:59:13,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:59:13,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-24 09:59:13,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542221482] [2021-10-24 09:59:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 09:59:13,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:59:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 09:59:13,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:59:13,666 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-24 09:59:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:59:13,730 INFO L93 Difference]: Finished difference Result 131 states and 160 transitions. [2021-10-24 09:59:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 09:59:13,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2021-10-24 09:59:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:59:13,736 INFO L225 Difference]: With dead ends: 131 [2021-10-24 09:59:13,738 INFO L226 Difference]: Without dead ends: 78 [2021-10-24 09:59:13,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 09:59:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-24 09:59:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-24 09:59:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 56 states have internal predecessors, (62), 16 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2021-10-24 09:59:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-10-24 09:59:13,768 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 30 [2021-10-24 09:59:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:59:13,769 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-10-24 09:59:13,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-24 09:59:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-10-24 09:59:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-24 09:59:13,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:59:13,779 INFO L512 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] [2021-10-24 09:59:13,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 09:59:13,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:59:13,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-24 09:59:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:59:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1904559170, now seen corresponding path program 1 times [2021-10-24 09:59:14,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:59:14,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487876662] [2021-10-24 09:59:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:14,005 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:59:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:59:14,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:59:14,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 09:59:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 09:59:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:59:14,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:59:14,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:59:14,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487876662] [2021-10-24 09:59:14,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487876662] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:59:14,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673845035] [2021-10-24 09:59:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:14,957 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 09:59:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 09:59:14,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 09:59:14,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-24 09:59:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 09:59:15,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:59:15,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:59:15,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [673845035] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:59:15,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528643397] [2021-10-24 09:59:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:15,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:59:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 09:59:15,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 09:59:15,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-24 09:59:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 09:59:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:59:16,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-24 09:59:16,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528643397] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 09:59:16,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 09:59:16,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2021-10-24 09:59:16,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880285203] [2021-10-24 09:59:16,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 09:59:16,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:59:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 09:59:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-24 09:59:16,593 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-24 09:59:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:59:16,784 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2021-10-24 09:59:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 09:59:16,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2021-10-24 09:59:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:59:16,788 INFO L225 Difference]: With dead ends: 139 [2021-10-24 09:59:16,788 INFO L226 Difference]: Without dead ends: 80 [2021-10-24 09:59:16,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-24 09:59:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-24 09:59:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-24 09:59:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 58 states have internal predecessors, (63), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2021-10-24 09:59:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-10-24 09:59:16,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 42 [2021-10-24 09:59:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:59:16,803 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-10-24 09:59:16,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-24 09:59:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-10-24 09:59:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-24 09:59:16,806 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:59:16,806 INFO L512 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] [2021-10-24 09:59:16,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-24 09:59:17,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 09:59:17,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-24 09:59:17,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 09:59:17,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-24 09:59:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:59:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1838253317, now seen corresponding path program 1 times [2021-10-24 09:59:17,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:59:17,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335543737] [2021-10-24 09:59:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:17,410 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:59:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:59:17,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:59:17,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 09:59:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 09:59:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 09:59:17,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-24 09:59:18,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:59:18,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335543737] [2021-10-24 09:59:18,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335543737] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:59:18,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:59:18,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-24 09:59:18,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176136072] [2021-10-24 09:59:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 09:59:18,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:59:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 09:59:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:59:18,107 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-24 09:59:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:59:18,287 INFO L93 Difference]: Finished difference Result 139 states and 173 transitions. [2021-10-24 09:59:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 09:59:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 52 [2021-10-24 09:59:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:59:18,296 INFO L225 Difference]: With dead ends: 139 [2021-10-24 09:59:18,297 INFO L226 Difference]: Without dead ends: 82 [2021-10-24 09:59:18,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-24 09:59:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-24 09:59:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-24 09:59:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 60 states have internal predecessors, (64), 16 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2021-10-24 09:59:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2021-10-24 09:59:18,317 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 52 [2021-10-24 09:59:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:59:18,318 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2021-10-24 09:59:18,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-24 09:59:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2021-10-24 09:59:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-24 09:59:18,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:59:18,322 INFO L512 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] [2021-10-24 09:59:18,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 09:59:18,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:59:18,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-24 09:59:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:59:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1543692906, now seen corresponding path program 1 times [2021-10-24 09:59:18,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:59:18,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092552128] [2021-10-24 09:59:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:18,539 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:59:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:59:18,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:59:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 09:59:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 09:59:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 09:59:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 09:59:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-24 09:59:19,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 09:59:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-24 09:59:19,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 09:59:19,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092552128] [2021-10-24 09:59:19,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092552128] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 09:59:19,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 09:59:19,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-24 09:59:19,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745682580] [2021-10-24 09:59:19,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 09:59:19,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 09:59:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 09:59:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-24 09:59:19,439 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-10-24 09:59:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 09:59:19,934 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2021-10-24 09:59:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 09:59:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2021-10-24 09:59:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 09:59:19,938 INFO L225 Difference]: With dead ends: 134 [2021-10-24 09:59:19,938 INFO L226 Difference]: Without dead ends: 84 [2021-10-24 09:59:19,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-24 09:59:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-24 09:59:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-24 09:59:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 62 states have internal predecessors, (65), 16 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (25), 16 states have call predecessors, (25), 16 states have call successors, (25) [2021-10-24 09:59:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2021-10-24 09:59:19,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 65 [2021-10-24 09:59:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 09:59:19,953 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2021-10-24 09:59:19,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-10-24 09:59:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2021-10-24 09:59:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-24 09:59:19,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 09:59:19,956 INFO L512 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] [2021-10-24 09:59:19,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-24 09:59:20,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:59:20,173 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-24 09:59:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 09:59:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1767582969, now seen corresponding path program 1 times [2021-10-24 09:59:20,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 09:59:20,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020308114] [2021-10-24 09:59:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 09:59:20,175 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 09:59:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 09:59:20,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 09:59:20,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 09:59:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:59:20,750 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 09:59:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 09:59:21,162 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 09:59:21,162 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 09:59:21,163 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:59:21,165 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:59:21,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:59:21,166 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 09:59:21,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 09:59:21,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 09:59:21,388 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 09:59:21,413 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,414 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,414 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,415 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,419 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,420 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,420 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,421 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,422 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,422 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,423 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,423 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 09:59:21 BoogieIcfgContainer [2021-10-24 09:59:21,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 09:59:21,479 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 09:59:21,479 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 09:59:21,479 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 09:59:21,480 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:59:12" (3/4) ... [2021-10-24 09:59:21,482 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 09:59:21,510 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,511 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,511 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,511 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,513 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,515 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,515 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,517 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-24 09:59:21,603 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 09:59:21,604 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 09:59:21,605 INFO L168 Benchmark]: Toolchain (without parser) took 11010.52 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 34.6 MB in the beginning and 37.8 MB in the end (delta: -3.1 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:21,606 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory is still 38.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:59:21,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.17 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 50.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:21,607 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.14 ms. Allocated memory is still 69.2 MB. Free memory was 50.9 MB in the beginning and 49.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:21,607 INFO L168 Benchmark]: Boogie Preprocessor took 75.02 ms. Allocated memory is still 69.2 MB. Free memory was 49.1 MB in the beginning and 47.2 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 09:59:21,607 INFO L168 Benchmark]: RCFGBuilder took 962.18 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 44.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:21,608 INFO L168 Benchmark]: TraceAbstraction took 9310.84 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 43.7 MB in the beginning and 44.7 MB in the end (delta: -966.6 kB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:21,608 INFO L168 Benchmark]: Witness Printer took 124.83 ms. Allocated memory is still 83.9 MB. Free memory was 44.7 MB in the beginning and 37.8 MB in the end (delta: 6.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 09:59:21,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory is still 38.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 458.17 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 50.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.14 ms. Allocated memory is still 69.2 MB. Free memory was 50.9 MB in the beginning and 49.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.02 ms. Allocated memory is still 69.2 MB. Free memory was 49.1 MB in the beginning and 47.2 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 962.18 ms. Allocated memory is still 69.2 MB. Free memory was 47.0 MB in the beginning and 44.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9310.84 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 43.7 MB in the beginning and 44.7 MB in the end (delta: -966.6 kB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * Witness Printer took 124.83 ms. Allocated memory is still 83.9 MB. Free memory was 44.7 MB in the beginning and 37.8 MB in the end (delta: 6.9 MB). Peak memory consumption was 8.4 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 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 [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 [n={1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={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() - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 81 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 9124.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 40.5ms, AutomataDifference: 1043.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 450 SDtfs, 153 SDslu, 1371 SDs, 0 SdLazy, 203 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 635.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 603 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 314.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 100.3ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 201.3ms SsaConstructionTime, 750.4ms SatisfiabilityAnalysisTime, 3576.5ms InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 592 ConstructedInterpolants, 0 QuantifiedInterpolants, 1347 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1063 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 168/180 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 09:59:21,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffd35e76-c2da-4149-99fe-444b02d1d7e1/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...