./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74289de26b6d11ce9d727281c5976611ee27d2e8 ............................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74289de26b6d11ce9d727281c5976611ee27d2e8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 13:10:26,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 13:10:26,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 13:10:27,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 13:10:27,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 13:10:27,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 13:10:27,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 13:10:27,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 13:10:27,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 13:10:27,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 13:10:27,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 13:10:27,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 13:10:27,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 13:10:27,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 13:10:27,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 13:10:27,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 13:10:27,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 13:10:27,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 13:10:27,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 13:10:27,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 13:10:27,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 13:10:27,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 13:10:27,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 13:10:27,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 13:10:27,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 13:10:27,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 13:10:27,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 13:10:27,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 13:10:27,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 13:10:27,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 13:10:27,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 13:10:27,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 13:10:27,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 13:10:27,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 13:10:27,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 13:10:27,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 13:10:27,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 13:10:27,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 13:10:27,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 13:10:27,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 13:10:27,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 13:10:27,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 13:10:27,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 13:10:27,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 13:10:27,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 13:10:27,102 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 13:10:27,103 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 13:10:27,103 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 13:10:27,103 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 13:10:27,103 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 13:10:27,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 13:10:27,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 13:10:27,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 13:10:27,104 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 13:10:27,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 13:10:27,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 13:10:27,105 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 13:10:27,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 13:10:27,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 13:10:27,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 13:10:27,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 13:10:27,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 13:10:27,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 13:10:27,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 13:10:27,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 13:10:27,107 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 13:10:27,107 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 13:10:27,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 13:10:27,107 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 13:10:27,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 13:10:27,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 13:10:27,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 13:10:27,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:10:27,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 13:10:27,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 13:10:27,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 13:10:27,109 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 13:10:27,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 13:10:27,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 13:10:27,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 13:10:27,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 13:10:27,110 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2020-12-09 13:10:27,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 13:10:27,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 13:10:27,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 13:10:27,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 13:10:27,305 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 13:10:27,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-12-09 13:10:27,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/ecf08802f/46c56b6cfb324447bc9370d14c14d180/FLAGe8ac6e507 [2020-12-09 13:10:27,715 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 13:10:27,716 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-12-09 13:10:27,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/ecf08802f/46c56b6cfb324447bc9370d14c14d180/FLAGe8ac6e507 [2020-12-09 13:10:27,730 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/ecf08802f/46c56b6cfb324447bc9370d14c14d180 [2020-12-09 13:10:27,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 13:10:27,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 13:10:27,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 13:10:27,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 13:10:27,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 13:10:27,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:10:27" (1/1) ... [2020-12-09 13:10:27,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66795a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:27, skipping insertion in model container [2020-12-09 13:10:27,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:10:27" (1/1) ... [2020-12-09 13:10:27,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 13:10:27,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 13:10:27,863 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2020-12-09 13:10:27,877 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 13:10:27,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:10:27,901 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2020-12-09 13:10:27,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c1f0828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:27, skipping insertion in model container [2020-12-09 13:10:27,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 13:10:27,902 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-12-09 13:10:27,904 INFO L168 Benchmark]: Toolchain (without parser) took 170.13 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 84.0 MB in the end (delta: -1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:27,905 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 72.1 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:10:27,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.55 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 84.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:27,907 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 72.1 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 168.55 ms. Allocated memory is still 107.0 MB. Free memory was 82.3 MB in the beginning and 84.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 13:10:29,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 13:10:29,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 13:10:29,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 13:10:29,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 13:10:29,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 13:10:29,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 13:10:29,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 13:10:29,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 13:10:29,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 13:10:29,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 13:10:29,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 13:10:29,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 13:10:29,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 13:10:29,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 13:10:29,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 13:10:29,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 13:10:29,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 13:10:29,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 13:10:29,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 13:10:29,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 13:10:29,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 13:10:29,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 13:10:29,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 13:10:29,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 13:10:29,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 13:10:29,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 13:10:29,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 13:10:29,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 13:10:29,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 13:10:29,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 13:10:29,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 13:10:29,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 13:10:29,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 13:10:29,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 13:10:29,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 13:10:29,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 13:10:29,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 13:10:29,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 13:10:29,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 13:10:29,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 13:10:29,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 13:10:29,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 13:10:29,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 13:10:29,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 13:10:29,285 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 13:10:29,285 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 13:10:29,285 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 13:10:29,286 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 13:10:29,286 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 13:10:29,286 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 13:10:29,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 13:10:29,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 13:10:29,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 13:10:29,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 13:10:29,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 13:10:29,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 13:10:29,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 13:10:29,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 13:10:29,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:10:29,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 13:10:29,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 13:10:29,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 13:10:29,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 13:10:29,290 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2020-12-09 13:10:29,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 13:10:29,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 13:10:29,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 13:10:29,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 13:10:29,555 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 13:10:29,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-12-09 13:10:29,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/b3354c01f/8488013fb2694288832d749c811c46ab/FLAG6dfa49352 [2020-12-09 13:10:30,080 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 13:10:30,080 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-12-09 13:10:30,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/b3354c01f/8488013fb2694288832d749c811c46ab/FLAG6dfa49352 [2020-12-09 13:10:30,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/data/b3354c01f/8488013fb2694288832d749c811c46ab [2020-12-09 13:10:30,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 13:10:30,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 13:10:30,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 13:10:30,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 13:10:30,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 13:10:30,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34db79d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30, skipping insertion in model container [2020-12-09 13:10:30,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 13:10:30,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 13:10:30,215 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2020-12-09 13:10:30,229 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 13:10:30,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:10:30,251 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-12-09 13:10:30,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 13:10:30,257 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2020-12-09 13:10:30,263 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 13:10:30,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:10:30,274 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 13:10:30,292 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2020-12-09 13:10:30,303 WARN L1501 CHandler]: Possible shadowing of function min [2020-12-09 13:10:30,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:10:30,330 INFO L208 MainTranslator]: Completed translation [2020-12-09 13:10:30,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30 WrapperNode [2020-12-09 13:10:30,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 13:10:30,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 13:10:30,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 13:10:30,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 13:10:30,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 13:10:30,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 13:10:30,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 13:10:30,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 13:10:30,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... [2020-12-09 13:10:30,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 13:10:30,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 13:10:30,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 13:10:30,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 13:10:30,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:10:30,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 13:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 13:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 13:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-12-09 13:10:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-12-09 13:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 13:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 13:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-09 13:10:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-09 13:10:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 13:10:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-12-09 13:10:30,473 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-12-09 13:10:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 13:10:30,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 13:10:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-12-09 13:10:30,473 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-12-09 13:10:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 13:10:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 13:10:30,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 13:10:30,973 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-09 13:10:30,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:10:30 BoogieIcfgContainer [2020-12-09 13:10:30,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 13:10:30,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 13:10:30,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 13:10:30,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 13:10:30,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:10:30" (1/3) ... [2020-12-09 13:10:30,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b1bda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:10:30, skipping insertion in model container [2020-12-09 13:10:30,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:10:30" (2/3) ... [2020-12-09 13:10:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b1bda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:10:30, skipping insertion in model container [2020-12-09 13:10:30,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:10:30" (3/3) ... [2020-12-09 13:10:30,981 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-12-09 13:10:30,994 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 13:10:30,997 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 13:10:31,007 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 13:10:31,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 13:10:31,029 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 13:10:31,030 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 13:10:31,030 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 13:10:31,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 13:10:31,030 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 13:10:31,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 13:10:31,030 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 13:10:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2020-12-09 13:10:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 13:10:31,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:10:31,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:10:31,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:10:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:10:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash 400471207, now seen corresponding path program 1 times [2020-12-09 13:10:31,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:10:31,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96638085] [2020-12-09 13:10:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 13:10:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 13:10:31,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:10:31,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 13:10:31,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96638085] [2020-12-09 13:10:31,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:10:31,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 13:10:31,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234793542] [2020-12-09 13:10:31,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 13:10:31,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:10:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 13:10:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 13:10:31,206 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 2 states. [2020-12-09 13:10:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:10:31,225 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2020-12-09 13:10:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 13:10:31,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-09 13:10:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:10:31,232 INFO L225 Difference]: With dead ends: 131 [2020-12-09 13:10:31,232 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 13:10:31,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 13:10:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 13:10:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-09 13:10:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 13:10:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-12-09 13:10:31,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 30 [2020-12-09 13:10:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:10:31,265 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-12-09 13:10:31,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 13:10:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-12-09 13:10:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 13:10:31,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:10:31,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:10:31,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 13:10:31,468 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:10:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:10:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1101535785, now seen corresponding path program 1 times [2020-12-09 13:10:31,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:10:31,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670263422] [2020-12-09 13:10:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 13:10:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 13:10:31,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:10:31,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 13:10:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670263422] [2020-12-09 13:10:31,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:10:31,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 13:10:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086245404] [2020-12-09 13:10:31,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 13:10:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:10:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 13:10:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 13:10:31,586 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 5 states. [2020-12-09 13:10:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:10:31,616 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-12-09 13:10:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 13:10:31,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-09 13:10:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:10:31,620 INFO L225 Difference]: With dead ends: 125 [2020-12-09 13:10:31,620 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 13:10:31,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 13:10:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 13:10:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-09 13:10:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 13:10:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2020-12-09 13:10:31,634 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 30 [2020-12-09 13:10:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:10:31,635 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2020-12-09 13:10:31,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 13:10:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2020-12-09 13:10:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-09 13:10:31,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:10:31,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:10:31,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 13:10:31,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:10:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:10:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1481862926, now seen corresponding path program 1 times [2020-12-09 13:10:31,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:10:31,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837385146] [2020-12-09 13:10:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 13:10:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:31,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 13:10:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:10:32,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:10:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:10:32,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837385146] [2020-12-09 13:10:32,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749038793] [2020-12-09 13:10:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:10:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:32,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 13:10:32,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:10:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:10:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:10:32,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468952608] [2020-12-09 13:10:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:10:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 13:10:32,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:10:32,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:10:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:10:32,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:10:32,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2020-12-09 13:10:32,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592070323] [2020-12-09 13:10:32,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 13:10:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:10:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 13:10:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-09 13:10:32,784 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 8 states. [2020-12-09 13:10:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:10:32,919 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2020-12-09 13:10:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 13:10:32,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-09 13:10:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:10:32,921 INFO L225 Difference]: With dead ends: 133 [2020-12-09 13:10:32,921 INFO L226 Difference]: Without dead ends: 77 [2020-12-09 13:10:32,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-09 13:10:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-09 13:10:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-09 13:10:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-09 13:10:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-12-09 13:10:32,929 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 42 [2020-12-09 13:10:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:10:32,930 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-12-09 13:10:32,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 13:10:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-12-09 13:10:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 13:10:32,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:10:32,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:10:33,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 cvc4 --incremental --print-success --lang smt [2020-12-09 13:10:33,537 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:10:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:10:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1950591435, now seen corresponding path program 1 times [2020-12-09 13:10:33,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:10:33,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153609564] [2020-12-09 13:10:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 13:10:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:33,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 13:10:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-09 13:10:33,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 13:10:33,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153609564] [2020-12-09 13:10:33,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:10:33,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 13:10:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481647746] [2020-12-09 13:10:33,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 13:10:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:10:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 13:10:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 13:10:33,693 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 8 states. [2020-12-09 13:10:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:10:33,814 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2020-12-09 13:10:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 13:10:33,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-12-09 13:10:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:10:33,816 INFO L225 Difference]: With dead ends: 133 [2020-12-09 13:10:33,816 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 13:10:33,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 13:10:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 13:10:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-09 13:10:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 13:10:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-12-09 13:10:33,824 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 52 [2020-12-09 13:10:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:10:33,824 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-12-09 13:10:33,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 13:10:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-12-09 13:10:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-09 13:10:33,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:10:33,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:10:34,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 13:10:34,027 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:10:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:10:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash 989968802, now seen corresponding path program 1 times [2020-12-09 13:10:34,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:10:34,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797035747] [2020-12-09 13:10:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 13:10:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:10:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 13:10:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:10:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-09 13:10:34,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 13:10:34,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797035747] [2020-12-09 13:10:34,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:10:34,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 13:10:34,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801189988] [2020-12-09 13:10:34,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 13:10:34,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:10:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 13:10:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 13:10:34,245 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 8 states. [2020-12-09 13:10:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:10:34,611 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2020-12-09 13:10:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 13:10:34,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-12-09 13:10:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:10:34,613 INFO L225 Difference]: With dead ends: 128 [2020-12-09 13:10:34,613 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 13:10:34,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 13:10:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 13:10:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-09 13:10:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-09 13:10:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2020-12-09 13:10:34,624 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 65 [2020-12-09 13:10:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:10:34,625 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2020-12-09 13:10:34,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 13:10:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2020-12-09 13:10:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 13:10:34,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:10:34,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:10:34,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 13:10:34,830 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:10:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:10:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1197061387, now seen corresponding path program 1 times [2020-12-09 13:10:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:10:34,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139668144] [2020-12-09 13:10:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 13:10:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 13:10:35,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 13:10:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 13:10:35,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 13:10:35,353 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 13:10:35,353 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 13:10:35,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 13:10:35,575 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,575 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,576 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,576 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,578 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,578 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,578 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,578 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,578 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,579 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,579 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,579 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:10:35 BoogieIcfgContainer [2020-12-09 13:10:35,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 13:10:35,610 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 13:10:35,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 13:10:35,610 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 13:10:35,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:10:30" (3/4) ... [2020-12-09 13:10:35,611 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 13:10:35,616 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,616 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,617 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,617 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,618 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,618 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,618 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,618 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,618 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,619 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,619 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,619 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-12-09 13:10:35,672 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c402c1f8-5107-4392-a40f-a96e11f2420f/bin/utaipan/witness.graphml [2020-12-09 13:10:35,673 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 13:10:35,674 INFO L168 Benchmark]: Toolchain (without parser) took 5574.69 ms. Allocated memory was 60.8 MB in the beginning and 94.4 MB in the end (delta: 33.6 MB). Free memory was 44.0 MB in the beginning and 41.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,675 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory is still 43.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:10:35,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.49 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 42.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 60.8 MB. Free memory was 42.5 MB in the beginning and 40.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,676 INFO L168 Benchmark]: Boogie Preprocessor took 36.90 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 38.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,677 INFO L168 Benchmark]: RCFGBuilder took 565.63 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 38.3 MB in the beginning and 37.6 MB in the end (delta: 697.4 kB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,677 INFO L168 Benchmark]: TraceAbstraction took 4633.56 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 37.2 MB in the beginning and 47.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,677 INFO L168 Benchmark]: Witness Printer took 63.09 ms. Allocated memory is still 94.4 MB. Free memory was 47.3 MB in the beginning and 41.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 13:10:35,680 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory is still 43.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.49 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 42.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 60.8 MB. Free memory was 42.5 MB in the beginning and 40.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.90 ms. Allocated memory is still 60.8 MB. Free memory was 40.3 MB in the beginning and 38.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 565.63 ms. Allocated memory was 60.8 MB in the beginning and 77.6 MB in the end (delta: 16.8 MB). Free memory was 38.3 MB in the beginning and 37.6 MB in the end (delta: 697.4 kB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4633.56 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 37.2 MB in the beginning and 47.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Witness Printer took 63.09 ms. Allocated memory is still 94.4 MB. Free memory was 47.3 MB in the beginning and 41.0 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: - 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 [malloc(sizeof(struct node))={3:0}, n={3:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={3:0}, n={3:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={3:0}, malloc(sizeof(struct node))={3:0}, n={3:0}] [L105] RET nondet_tree() [L83] CALL, EXPR min(t) VAL [n={3:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={3:0}, n={3:0}, 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={3:0}, n={3:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={3:0}, n={3:0}, 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={3:0}, n={3:0}, 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={3:0}, n={3:0}] [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) VAL [t={3:0}] [L78] COND FALSE !(!t) [L79] EXPR t->left VAL [t={3:0}, t={3:0}, 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={3:0}, t={3:0}, t->left={0:0}] [L79] EXPR t->right VAL [size(t->left)=0, t={3:0}, t={3:0}, 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={3:0}, t={3:0}, 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={5:0}, t={3:0}] [L67] COND FALSE !(!t) [L70] EXPR t->left VAL [\old(i)=1, a={5:0}, a={5:0}, i=1, t={3:0}, t={3:0}, t->left={0:0}] [L70] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={5:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={5:0}, a={5:0}, i=1, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={5:0}, a={5:0}, i=1, t={3:0}, t={3:0}, 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={5:0}, a={5:0}, i=2, t={3:0}, t={3:0}, t->right={0:0}] [L72] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={5:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={5:0}, a={5:0}, i=2, t={0:0}, t={0:0}] [L72] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={5:0}, a={5:0}, i=2, t={3:0}, t={3:0}, 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={5:0}, a={5:0}, i=2, t={3:0}, t={3:0}] [L89] RET tree_inorder(t, x, n) [L90] x[0] [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 78 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 433 SDtfs, 158 SDslu, 1516 SDs, 0 SdLazy, 237 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 430 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 419 ConstructedInterpolants, 0 QuantifiedInterpolants, 46738 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1067 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 114/126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...