./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG --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 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 ............................................................................................................................................. 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_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG --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 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-b2eff8b [2021-10-29 05:20:31,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:20:31,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:20:31,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:20:31,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:20:31,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:20:31,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:20:31,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:20:31,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:20:31,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:20:31,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:20:31,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:20:31,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:20:31,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:20:31,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:20:31,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:20:31,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:20:31,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:20:31,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:20:31,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:20:31,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:20:31,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:20:31,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:20:31,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:20:31,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:20:31,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:20:31,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:20:31,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:20:31,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:20:31,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:20:31,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:20:31,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:20:31,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:20:31,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:20:31,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:20:31,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:20:31,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:20:31,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:20:31,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:20:31,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:20:31,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:20:31,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:20:31,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:20:31,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:20:31,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:20:31,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:20:31,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:20:31,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:20:31,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:20:31,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:20:31,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:20:31,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:20:31,927 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:20:31,927 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:20:31,928 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:20:31,928 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:20:31,928 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:20:31,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:20:31,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:20:31,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:20:31,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:20:31,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:20:31,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:20:31,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:20:31,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:20:31,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:20:31,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:20:31,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:20:31,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:20:31,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:20:31,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:20:31,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:20:31,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:20:31,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:20:31,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:20:31,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:20:31,935 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:20:31,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:20:31,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:20:31,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:20:31,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:20:31,936 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_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 [2021-10-29 05:20:32,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:20:32,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:20:32,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:20:32,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:20:32,268 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:20:32,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-29 05:20:32,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/4d5925a29/dcc9bf5018a24c578be92ae2d6395ab2/FLAGb63ee9be3 [2021-10-29 05:20:32,971 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:20:32,972 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-29 05:20:32,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/4d5925a29/dcc9bf5018a24c578be92ae2d6395ab2/FLAGb63ee9be3 [2021-10-29 05:20:33,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/4d5925a29/dcc9bf5018a24c578be92ae2d6395ab2 [2021-10-29 05:20:33,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:20:33,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:20:33,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:20:33,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:20:33,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:20:33,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:20:33" (1/1) ... [2021-10-29 05:20:33,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c0f2ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:33, skipping insertion in model container [2021-10-29 05:20:33,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:20:33" (1/1) ... [2021-10-29 05:20:33,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:20:33,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:20:33,484 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_6d4c6e25-f7a1-4a7a-8062-317393950573/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-29 05:20:33,508 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:20:33,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:20:33,552 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) [2021-10-29 05:20:33,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cf70516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:33, skipping insertion in model container [2021-10-29 05:20:33,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:20:33,554 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-29 05:20:33,559 INFO L168 Benchmark]: Toolchain (without parser) took 250.77 ms. Allocated memory is still 102.8 MB. Free memory was 64.8 MB in the beginning and 55.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:33,561 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 83.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:20:33,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.68 ms. Allocated memory is still 102.8 MB. Free memory was 64.6 MB in the beginning and 55.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:33,565 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 83.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.68 ms. Allocated memory is still 102.8 MB. Free memory was 64.6 MB in the beginning and 55.6 MB in the end (delta: 9.1 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-b2eff8b [2021-10-29 05:20:35,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:20:35,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:20:36,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:20:36,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:20:36,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:20:36,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:20:36,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:20:36,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:20:36,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:20:36,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:20:36,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:20:36,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:20:36,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:20:36,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:20:36,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:20:36,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:20:36,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:20:36,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:20:36,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:20:36,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:20:36,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:20:36,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:20:36,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:20:36,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:20:36,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:20:36,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:20:36,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:20:36,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:20:36,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:20:36,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:20:36,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:20:36,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:20:36,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:20:36,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:20:36,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:20:36,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:20:36,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:20:36,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:20:36,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:20:36,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:20:36,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-29 05:20:36,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:20:36,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:20:36,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:20:36,176 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:20:36,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:20:36,177 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:20:36,177 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:20:36,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:20:36,178 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:20:36,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:20:36,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:20:36,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:20:36,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:20:36,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:20:36,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:20:36,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:20:36,182 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:20:36,183 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:20:36,183 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:20:36,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:20:36,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:20:36,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:20:36,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:20:36,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:20:36,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:20:36,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:20:36,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:20:36,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:20:36,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:20:36,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:20:36,186 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:20:36,187 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:20:36,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:20:36,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:20:36,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:20:36,188 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_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11dfc9c267e4b15a18edd43bd8f373e4d6af1fa864b5f35e9818e0875ad24411 [2021-10-29 05:20:36,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:20:36,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:20:36,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:20:36,648 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:20:36,649 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:20:36,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-29 05:20:36,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/600f80a22/898185eba093418091149b2c22f4975e/FLAGd033b33e7 [2021-10-29 05:20:37,255 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:20:37,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-29 05:20:37,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/600f80a22/898185eba093418091149b2c22f4975e/FLAGd033b33e7 [2021-10-29 05:20:37,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/data/600f80a22/898185eba093418091149b2c22f4975e [2021-10-29 05:20:37,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:20:37,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:20:37,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:20:37,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:20:37,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:20:37,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:20:37" (1/1) ... [2021-10-29 05:20:37,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7bfcc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:37, skipping insertion in model container [2021-10-29 05:20:37,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:20:37" (1/1) ... [2021-10-29 05:20:37,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:20:37,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:20:37,926 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_6d4c6e25-f7a1-4a7a-8062-317393950573/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-29 05:20:37,945 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:20:37,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:20:38,004 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-29 05:20:38,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:20:38,014 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_6d4c6e25-f7a1-4a7a-8062-317393950573/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-29 05:20:38,023 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:20:38,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:20:38,041 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:20:38,054 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_6d4c6e25-f7a1-4a7a-8062-317393950573/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-29 05:20:38,063 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-29 05:20:38,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:20:38,091 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:20:38,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38 WrapperNode [2021-10-29 05:20:38,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:20:38,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:20:38,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:20:38,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:20:38,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:20:38,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:20:38,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:20:38,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:20:38,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:20:38,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:20:38,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:20:38,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:20:38,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (1/1) ... [2021-10-29 05:20:38,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:20:38,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:20:38,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:20:38,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:20:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:20:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:20:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:20:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-29 05:20:38,289 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-29 05:20:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:20:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:20:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-29 05:20:38,291 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-29 05:20:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:20:38,291 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-29 05:20:38,291 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-29 05:20:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:20:38,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:20:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-29 05:20:38,292 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-29 05:20:38,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 05:20:38,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-29 05:20:39,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:20:39,038 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-10-29 05:20:39,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:20:39 BoogieIcfgContainer [2021-10-29 05:20:39,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:20:39,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:20:39,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:20:39,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:20:39,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:20:37" (1/3) ... [2021-10-29 05:20:39,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b2a1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:20:39, skipping insertion in model container [2021-10-29 05:20:39,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:20:38" (2/3) ... [2021-10-29 05:20:39,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b2a1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:20:39, skipping insertion in model container [2021-10-29 05:20:39,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:20:39" (3/3) ... [2021-10-29 05:20:39,049 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-10-29 05:20:39,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:20:39,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-29 05:20:39,111 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:20:39,118 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 [2021-10-29 05:20:39,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-29 05:20:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 59 states have internal predecessors, (74), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-29 05:20:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 05:20:39,149 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:20:39,150 INFO L513 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] [2021-10-29 05:20:39,151 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)] === [2021-10-29 05:20:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:20:39,161 INFO L85 PathProgramCache]: Analyzing trace with hash 400471207, now seen corresponding path program 1 times [2021-10-29 05:20:39,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:20:39,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378991817] [2021-10-29 05:20:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:39,182 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:20:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:20:39,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:20:39,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:20:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-29 05:20:39,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:20:39,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:20:39,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:20:39,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378991817] [2021-10-29 05:20:39,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378991817] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:20:39,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:20:39,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:20:39,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674937427] [2021-10-29 05:20:39,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:20:39,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:20:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:20:39,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:20:39,717 INFO L87 Difference]: Start difference. First operand has 78 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 59 states have internal predecessors, (74), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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) [2021-10-29 05:20:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:20:39,766 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2021-10-29 05:20:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:20:39,768 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 [2021-10-29 05:20:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:20:39,781 INFO L225 Difference]: With dead ends: 131 [2021-10-29 05:20:39,781 INFO L226 Difference]: Without dead ends: 73 [2021-10-29 05:20:39,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:20:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-29 05:20:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-29 05:20:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-29 05:20:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-10-29 05:20:39,852 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 30 [2021-10-29 05:20:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:20:39,854 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-10-29 05:20:39,854 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) [2021-10-29 05:20:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-10-29 05:20:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-29 05:20:39,858 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:20:39,858 INFO L513 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] [2021-10-29 05:20:39,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:40,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:20:40,059 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)] === [2021-10-29 05:20:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:20:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1101535785, now seen corresponding path program 1 times [2021-10-29 05:20:40,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:20:40,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240702522] [2021-10-29 05:20:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:40,062 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:20:40,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:20:40,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:20:40,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:20:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:20:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:20:40,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:20:40,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:20:40,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240702522] [2021-10-29 05:20:40,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240702522] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:20:40,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:20:40,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-29 05:20:40,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019064212] [2021-10-29 05:20:40,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:20:40,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:20:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:20:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:20:40,498 INFO L87 Difference]: Start difference. First operand 73 states and 90 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) [2021-10-29 05:20:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:20:40,537 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2021-10-29 05:20:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:20:40,538 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 [2021-10-29 05:20:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:20:40,541 INFO L225 Difference]: With dead ends: 125 [2021-10-29 05:20:40,542 INFO L226 Difference]: Without dead ends: 75 [2021-10-29 05:20:40,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:20:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-29 05:20:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-29 05:20:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2021-10-29 05:20:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-10-29 05:20:40,564 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 30 [2021-10-29 05:20:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:20:40,564 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-10-29 05:20:40,565 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) [2021-10-29 05:20:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-10-29 05:20:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-29 05:20:40,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:20:40,567 INFO L513 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] [2021-10-29 05:20:40,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:40,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:20:40,768 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)] === [2021-10-29 05:20:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:20:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1481862926, now seen corresponding path program 1 times [2021-10-29 05:20:40,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:20:40,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134714201] [2021-10-29 05:20:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:40,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:20:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:20:40,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:20:40,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:20:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:20:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:20:41,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:20:41,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:20:41,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134714201] [2021-10-29 05:20:41,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134714201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:20:41,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062919892] [2021-10-29 05:20:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:41,627 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-29 05:20:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/cvc4 [2021-10-29 05:20:41,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-29 05:20:41,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-29 05:20:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:20:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:20:42,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:20:42,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2062919892] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:20:42,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445203445] [2021-10-29 05:20:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:42,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:20:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:20:42,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:20:42,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:20:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:20:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:20:42,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-29 05:20:43,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445203445] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 05:20:43,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-29 05:20:43,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2021-10-29 05:20:43,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368548434] [2021-10-29 05:20:43,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:20:43,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:20:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:20:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:20:43,099 INFO L87 Difference]: Start difference. First operand 75 states and 94 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) [2021-10-29 05:20:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:20:43,272 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2021-10-29 05:20:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:20:43,272 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 [2021-10-29 05:20:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:20:43,274 INFO L225 Difference]: With dead ends: 133 [2021-10-29 05:20:43,275 INFO L226 Difference]: Without dead ends: 77 [2021-10-29 05:20:43,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:20:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-29 05:20:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-29 05:20:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2021-10-29 05:20:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2021-10-29 05:20:43,298 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 42 [2021-10-29 05:20:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:20:43,299 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2021-10-29 05:20:43,299 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) [2021-10-29 05:20:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2021-10-29 05:20:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-29 05:20:43,307 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:20:43,308 INFO L513 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] [2021-10-29 05:20:43,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-29 05:20:43,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:43,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:43,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:20:43,911 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)] === [2021-10-29 05:20:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:20:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1950591435, now seen corresponding path program 1 times [2021-10-29 05:20:43,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:20:43,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755148050] [2021-10-29 05:20:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:43,913 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:20:43,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:20:43,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:20:43,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:20:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:20:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-29 05:20:44,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-29 05:20:44,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:20:44,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755148050] [2021-10-29 05:20:44,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755148050] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:20:44,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:20:44,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-29 05:20:44,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338052729] [2021-10-29 05:20:44,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:20:44,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:20:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:20:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:20:44,612 INFO L87 Difference]: Start difference. First operand 77 states and 97 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) [2021-10-29 05:20:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:20:44,779 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2021-10-29 05:20:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:20:44,785 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 [2021-10-29 05:20:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:20:44,787 INFO L225 Difference]: With dead ends: 133 [2021-10-29 05:20:44,787 INFO L226 Difference]: Without dead ends: 79 [2021-10-29 05:20:44,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:20:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-29 05:20:44,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-29 05:20:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 60 states have internal predecessors, (65), 14 states have call successors, (14), 4 states have call predecessors, (14), 7 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-29 05:20:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2021-10-29 05:20:44,805 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 52 [2021-10-29 05:20:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:20:44,806 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2021-10-29 05:20:44,807 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) [2021-10-29 05:20:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2021-10-29 05:20:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-29 05:20:44,812 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:20:44,813 INFO L513 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] [2021-10-29 05:20:44,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:45,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:20:45,026 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)] === [2021-10-29 05:20:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:20:45,027 INFO L85 PathProgramCache]: Analyzing trace with hash 989968802, now seen corresponding path program 1 times [2021-10-29 05:20:45,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:20:45,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559953006] [2021-10-29 05:20:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:45,028 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:20:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:20:45,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:20:45,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:20:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:20:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:20:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:20:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-29 05:20:45,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:20:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-29 05:20:45,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:20:45,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559953006] [2021-10-29 05:20:45,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559953006] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:20:45,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:20:45,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-29 05:20:45,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748212897] [2021-10-29 05:20:45,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:20:45,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:20:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:20:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:20:45,767 INFO L87 Difference]: Start difference. First operand 79 states and 100 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) [2021-10-29 05:20:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:20:46,007 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2021-10-29 05:20:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-29 05:20:46,007 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 [2021-10-29 05:20:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:20:46,010 INFO L225 Difference]: With dead ends: 128 [2021-10-29 05:20:46,010 INFO L226 Difference]: Without dead ends: 81 [2021-10-29 05:20:46,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:20:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-29 05:20:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-29 05:20:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 62 states have internal predecessors, (66), 14 states have call successors, (14), 4 states have call predecessors, (14), 8 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2021-10-29 05:20:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-10-29 05:20:46,035 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 65 [2021-10-29 05:20:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:20:46,037 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-10-29 05:20:46,044 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) [2021-10-29 05:20:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-10-29 05:20:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-29 05:20:46,046 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:20:46,047 INFO L513 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] [2021-10-29 05:20:46,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:46,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:20:46,248 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)] === [2021-10-29 05:20:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:20:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1197061387, now seen corresponding path program 1 times [2021-10-29 05:20:46,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:20:46,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137014957] [2021-10-29 05:20:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:20:46,250 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:20:46,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:20:46,251 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:20:46,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 05:20:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:20:46,697 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:20:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:20:47,098 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:20:47,099 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:20:47,100 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:20:47,102 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:20:47,102 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:20:47,103 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:20:47,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:20:47,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:20:47,324 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-10-29 05:20:47,327 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:20:47,366 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,376 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,377 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,377 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,380 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,381 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,388 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,388 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,389 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,389 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,390 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,391 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:20:47 BoogieIcfgContainer [2021-10-29 05:20:47,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:20:47,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:20:47,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:20:47,435 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:20:47,435 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:20:39" (3/4) ... [2021-10-29 05:20:47,437 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:20:47,445 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,445 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,445 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,446 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,448 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,448 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,448 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,448 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,449 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,449 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,449 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,450 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-29 05:20:47,507 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:20:47,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:20:47,509 INFO L168 Benchmark]: Toolchain (without parser) took 9809.57 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 41.6 MB in the beginning and 38.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,510 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 62.9 MB. Free memory is still 42.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:20:47,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.48 ms. Allocated memory is still 62.9 MB. Free memory was 41.4 MB in the beginning and 42.0 MB in the end (delta: -550.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.61 ms. Allocated memory is still 62.9 MB. Free memory was 41.8 MB in the beginning and 40.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,511 INFO L168 Benchmark]: Boogie Preprocessor took 41.42 ms. Allocated memory is still 62.9 MB. Free memory was 40.0 MB in the beginning and 37.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,512 INFO L168 Benchmark]: RCFGBuilder took 846.15 ms. Allocated memory is still 62.9 MB. Free memory was 37.9 MB in the beginning and 36.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,512 INFO L168 Benchmark]: TraceAbstraction took 8391.08 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 35.7 MB in the beginning and 44.3 MB in the end (delta: -8.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,513 INFO L168 Benchmark]: Witness Printer took 73.74 ms. Allocated memory is still 92.3 MB. Free memory was 44.3 MB in the beginning and 38.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:20:47,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 62.9 MB. Free memory is still 42.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 388.48 ms. Allocated memory is still 62.9 MB. Free memory was 41.4 MB in the beginning and 42.0 MB in the end (delta: -550.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.61 ms. Allocated memory is still 62.9 MB. Free memory was 41.8 MB in the beginning and 40.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.42 ms. Allocated memory is still 62.9 MB. Free memory was 40.0 MB in the beginning and 37.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 846.15 ms. Allocated memory is still 62.9 MB. Free memory was 37.9 MB in the beginning and 36.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8391.08 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 35.7 MB in the beginning and 44.3 MB in the end (delta: -8.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. * Witness Printer took 73.74 ms. Allocated memory is still 92.3 MB. Free memory was 44.3 MB in the beginning and 38.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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: [L105] 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}] [L105] RET nondet_tree() [L83] 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}] [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) VAL [t={1:0}] [L78] COND FALSE !(!t) [L79] EXPR t->left VAL [t={1:0}, t={1:0}, t->left={0:0}] [L79] CALL, EXPR size(t->left) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->left) VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}] [L79] EXPR t->right VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}, t->right={0:0}] [L79] CALL, EXPR size(t->right) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] 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}] [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L10] COND FALSE !(!cond) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={2:0}, t={1:0}] [L67] COND FALSE !(!t) [L70] 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}] [L70] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={2:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={2:0}, a={2:0}, i=1, t={0:0}, t={0:0}] [L70] 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] [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] 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}] [L72] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={2:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={2:0}, a={2:0}, i=2, t={0:0}, t={0:0}] [L72] 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] [L72] i = tree_inorder(t->right, a, i) [L73] return i; VAL [\old(i)=1, \result=2, a={2:0}, a={2:0}, i=2, t={1:0}, t={1:0}] [L89] RET tree_inorder(t, x, n) [L90] 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 5 procedures, 78 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 8.2s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 433 SDtfs, 171 SDslu, 1364 SDs, 0 SdLazy, 223 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 603 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.2s 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! [2021-10-29 05:20:47,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d4c6e25-f7a1-4a7a-8062-317393950573/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...