./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ............................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:19:57,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:19:57,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:19:57,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:19:57,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:19:57,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:19:57,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:19:57,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:19:57,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:19:57,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:19:57,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:19:57,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:19:57,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:19:57,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:19:57,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:19:57,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:19:57,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:19:57,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:19:57,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:19:57,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:19:57,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:19:57,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:19:57,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:19:57,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:19:57,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:19:57,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:19:57,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:19:57,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:19:57,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:19:57,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:19:57,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:19:57,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:19:57,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:19:57,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:19:57,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:19:57,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:19:57,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:19:57,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:19:57,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:19:57,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:19:57,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:19:57,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2020-10-20 06:19:57,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:19:57,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:19:57,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:19:57,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:19:57,453 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:19:57,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:19:57,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:19:57,453 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:19:57,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:19:57,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:19:57,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:19:57,454 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:19:57,455 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:19:57,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:19:57,455 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:19:57,455 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:19:57,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:19:57,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:19:57,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:19:57,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:19:57,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:19:57,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:19:57,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:19:57,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:19:57,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:19:57,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:19:57,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:19:57,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2020-10-20 06:19:57,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:19:57,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:19:57,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:19:57,729 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:19:57,730 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:19:57,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-20 06:19:57,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee05174f/e35e7260595f4975a2d0494fb03baec8/FLAG18d458b2d [2020-10-20 06:19:58,226 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:19:58,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-20 06:19:58,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee05174f/e35e7260595f4975a2d0494fb03baec8/FLAG18d458b2d [2020-10-20 06:19:58,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee05174f/e35e7260595f4975a2d0494fb03baec8 [2020-10-20 06:19:58,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:19:58,587 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:19:58,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:19:58,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:19:58,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:19:58,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:19:58" (1/1) ... [2020-10-20 06:19:58,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8528da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:58, skipping insertion in model container [2020-10-20 06:19:58,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:19:58" (1/1) ... [2020-10-20 06:19:58,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:19:58,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:19:58,889 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:19:58,893 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:19:58,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:19:58,931 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) [2020-10-20 06:19:58,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2761a3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:58, skipping insertion in model container [2020-10-20 06:19:58,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:19:58,933 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2020-10-20 06:19:58,937 INFO L168 Benchmark]: Toolchain (without parser) took 354.07 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 9.7 MB in the beginning and 28.3 MB in the end (delta: -18.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:58,938 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 36.2 MB. Free memory is still 15.5 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:19:58,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.19 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 8.8 MB in the beginning and 28.3 MB in the end (delta: -19.5 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:58,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 36.2 MB. Free memory is still 15.5 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 345.19 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 8.8 MB in the beginning and 28.3 MB in the end (delta: -19.5 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 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 0.1.25-9a8b2e8 [2020-10-20 06:20:01,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:20:01,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:20:01,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:20:01,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:20:01,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:20:01,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:20:01,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:20:01,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:20:01,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:20:01,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:20:01,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:20:01,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:20:01,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:20:01,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:20:01,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:20:01,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:20:01,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:20:01,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:20:01,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:20:01,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:20:01,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:20:01,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:20:01,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:20:01,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:20:01,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:20:01,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:20:01,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:20:01,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:20:01,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:20:01,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:20:01,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:20:01,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:20:01,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:20:01,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:20:01,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:20:01,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:20:01,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:20:01,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:20:01,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:20:01,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:20:01,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2020-10-20 06:20:01,161 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:20:01,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:20:01,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:20:01,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:20:01,166 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:20:01,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:20:01,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:20:01,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:20:01,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:20:01,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:20:01,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:20:01,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:20:01,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:20:01,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:20:01,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:20:01,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 06:20:01,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 06:20:01,171 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:20:01,171 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:20:01,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:20:01,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:20:01,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:20:01,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:20:01,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:20:01,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:20:01,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:20:01,173 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 06:20:01,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 06:20:01,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:20:01,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 06:20:01,174 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2020-10-20 06:20:01,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:20:01,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:20:01,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:20:01,473 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:20:01,474 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:20:01,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-20 06:20:01,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20c3d8c78/2222591f970c4de99c96a6135341e3d1/FLAG8b289910b [2020-10-20 06:20:02,025 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:20:02,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2020-10-20 06:20:02,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20c3d8c78/2222591f970c4de99c96a6135341e3d1/FLAG8b289910b [2020-10-20 06:20:02,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20c3d8c78/2222591f970c4de99c96a6135341e3d1 [2020-10-20 06:20:02,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:20:02,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:20:02,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:20:02,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:20:02,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:20:02,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65240146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02, skipping insertion in model container [2020-10-20 06:20:02,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:20:02,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:20:02,739 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:20:02,742 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:20:02,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:20:02,784 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-10-20 06:20:02,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:20:02,800 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:20:02,802 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:20:02,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:20:02,823 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:20:02,853 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:20:02,855 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-20 06:20:02,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:20:02,893 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:20:02,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02 WrapperNode [2020-10-20 06:20:02,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:20:02,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:20:02,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:20:02,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:20:02,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... [2020-10-20 06:20:02,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:20:02,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:20:02,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:20:02,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:20:02,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:20:03,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:20:03,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:20:03,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-10-20 06:20:03,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:20:03,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-20 06:20:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-20 06:20:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-20 06:20:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-20 06:20:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-20 06:20:03,039 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-20 06:20:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-20 06:20:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:20:03,040 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-20 06:20:03,040 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 06:20:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 06:20:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 06:20:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:20:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-20 06:20:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-10-20 06:20:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:20:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:20:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:20:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:20:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-20 06:20:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-20 06:20:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 06:20:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 06:20:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 06:20:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-20 06:20:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 06:20:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 06:20:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-20 06:20:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:20:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-20 06:20:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-20 06:20:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-20 06:20:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-20 06:20:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:20:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:20:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 06:20:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:20:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-20 06:20:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-20 06:20:04,055 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:20:04,067 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-20 06:20:04,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:20:04 BoogieIcfgContainer [2020-10-20 06:20:04,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:20:04,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:20:04,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:20:04,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:20:04,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:20:02" (1/3) ... [2020-10-20 06:20:04,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efafef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:20:04, skipping insertion in model container [2020-10-20 06:20:04,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:20:02" (2/3) ... [2020-10-20 06:20:04,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efafef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:20:04, skipping insertion in model container [2020-10-20 06:20:04,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:20:04" (3/3) ... [2020-10-20 06:20:04,082 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-20 06:20:04,094 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:20:04,104 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 55 error locations. [2020-10-20 06:20:04,120 INFO L253 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2020-10-20 06:20:04,143 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:20:04,143 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:20:04,144 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:20:04,144 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:20:04,145 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:20:04,145 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:20:04,145 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:20:04,145 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:20:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states. [2020-10-20 06:20:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:20:04,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:04,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:04,197 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:04,204 INFO L82 PathProgramCache]: Analyzing trace with hash -707804875, now seen corresponding path program 1 times [2020-10-20 06:20:04,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:04,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721177898] [2020-10-20 06:20:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:20:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 06:20:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:04,410 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:04,410 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:04,422 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:04,423 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:04,424 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-20 06:20:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:04,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721177898] [2020-10-20 06:20:04,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:04,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 06:20:04,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985802827] [2020-10-20 06:20:04,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:20:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:04,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:20:04,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:20:04,484 INFO L87 Difference]: Start difference. First operand 189 states. Second operand 3 states. [2020-10-20 06:20:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:04,930 INFO L93 Difference]: Finished difference Result 187 states and 212 transitions. [2020-10-20 06:20:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:20:04,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-20 06:20:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:04,959 INFO L225 Difference]: With dead ends: 187 [2020-10-20 06:20:04,960 INFO L226 Difference]: Without dead ends: 183 [2020-10-20 06:20:04,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:20:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-20 06:20:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-20 06:20:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-20 06:20:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 203 transitions. [2020-10-20 06:20:05,065 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 203 transitions. Word has length 8 [2020-10-20 06:20:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:05,066 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 203 transitions. [2020-10-20 06:20:05,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:20:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 203 transitions. [2020-10-20 06:20:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:20:05,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:05,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:05,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 06:20:05,275 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash -707804874, now seen corresponding path program 1 times [2020-10-20 06:20:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:05,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927406356] [2020-10-20 06:20:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:20:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:20:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:05,403 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:05,404 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:05,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:05,425 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:05,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-20 06:20:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:05,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:05,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927406356] [2020-10-20 06:20:05,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:05,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-10-20 06:20:05,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243266614] [2020-10-20 06:20:05,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:20:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:20:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:20:05,509 INFO L87 Difference]: Start difference. First operand 181 states and 203 transitions. Second operand 4 states. [2020-10-20 06:20:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:06,208 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2020-10-20 06:20:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:20:06,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 06:20:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:06,212 INFO L225 Difference]: With dead ends: 180 [2020-10-20 06:20:06,213 INFO L226 Difference]: Without dead ends: 180 [2020-10-20 06:20:06,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:20:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-20 06:20:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-20 06:20:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-20 06:20:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2020-10-20 06:20:06,229 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2020-10-20 06:20:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:06,230 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2020-10-20 06:20:06,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:20:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2020-10-20 06:20:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 06:20:06,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:06,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:06,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 06:20:06,446 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:06,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash -528181038, now seen corresponding path program 1 times [2020-10-20 06:20:06,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:06,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642474292] [2020-10-20 06:20:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:20:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:06,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 06:20:06,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:06,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:06,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642474292] [2020-10-20 06:20:06,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:06,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2020-10-20 06:20:06,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980456927] [2020-10-20 06:20:06,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:20:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:20:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:20:06,760 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand 8 states. [2020-10-20 06:20:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:06,994 INFO L93 Difference]: Finished difference Result 245 states and 284 transitions. [2020-10-20 06:20:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:20:06,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-20 06:20:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:06,998 INFO L225 Difference]: With dead ends: 245 [2020-10-20 06:20:06,999 INFO L226 Difference]: Without dead ends: 245 [2020-10-20 06:20:06,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:20:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-20 06:20:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 228. [2020-10-20 06:20:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-20 06:20:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2020-10-20 06:20:07,020 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 15 [2020-10-20 06:20:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:07,021 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2020-10-20 06:20:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:20:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2020-10-20 06:20:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 06:20:07,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:07,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:07,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 06:20:07,239 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash -468129946, now seen corresponding path program 1 times [2020-10-20 06:20:07,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:07,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206213015] [2020-10-20 06:20:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 06:20:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:20:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:07,356 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:07,357 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:07,364 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:07,365 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:07,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-20 06:20:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:07,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:07,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206213015] [2020-10-20 06:20:07,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:07,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 06:20:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727956603] [2020-10-20 06:20:07,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:20:07,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:07,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:20:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:20:07,438 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand 5 states. [2020-10-20 06:20:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:10,236 INFO L93 Difference]: Finished difference Result 232 states and 283 transitions. [2020-10-20 06:20:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:20:10,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-20 06:20:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:10,243 INFO L225 Difference]: With dead ends: 232 [2020-10-20 06:20:10,243 INFO L226 Difference]: Without dead ends: 232 [2020-10-20 06:20:10,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:20:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-20 06:20:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2020-10-20 06:20:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-20 06:20:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 283 transitions. [2020-10-20 06:20:10,276 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 283 transitions. Word has length 14 [2020-10-20 06:20:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:10,277 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 283 transitions. [2020-10-20 06:20:10,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:20:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 283 transitions. [2020-10-20 06:20:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 06:20:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:10,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:10,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 06:20:10,480 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:10,481 INFO L82 PathProgramCache]: Analyzing trace with hash -468129945, now seen corresponding path program 1 times [2020-10-20 06:20:10,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:10,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630379686] [2020-10-20 06:20:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-20 06:20:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:20:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:10,574 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:10,574 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:10,581 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:10,581 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:10,582 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-20 06:20:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:10,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:10,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 06:20:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:10,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630379686] [2020-10-20 06:20:10,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:10,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-20 06:20:10,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782951250] [2020-10-20 06:20:10,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:20:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:20:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:20:10,724 INFO L87 Difference]: Start difference. First operand 230 states and 283 transitions. Second operand 6 states. [2020-10-20 06:20:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:12,193 INFO L93 Difference]: Finished difference Result 240 states and 299 transitions. [2020-10-20 06:20:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:20:12,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-20 06:20:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:12,197 INFO L225 Difference]: With dead ends: 240 [2020-10-20 06:20:12,197 INFO L226 Difference]: Without dead ends: 240 [2020-10-20 06:20:12,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:20:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-20 06:20:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 233. [2020-10-20 06:20:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-20 06:20:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 287 transitions. [2020-10-20 06:20:12,212 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 287 transitions. Word has length 14 [2020-10-20 06:20:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:12,213 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 287 transitions. [2020-10-20 06:20:12,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:20:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 287 transitions. [2020-10-20 06:20:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:20:12,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:12,214 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] [2020-10-20 06:20:12,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 06:20:12,428 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash 446420862, now seen corresponding path program 1 times [2020-10-20 06:20:12,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:12,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975663776] [2020-10-20 06:20:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:20:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 06:20:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:12,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:20:12,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975663776] [2020-10-20 06:20:12,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:12,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2020-10-20 06:20:12,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140277554] [2020-10-20 06:20:12,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:20:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:20:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:20:12,628 INFO L87 Difference]: Start difference. First operand 233 states and 287 transitions. Second operand 8 states. [2020-10-20 06:20:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:12,810 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2020-10-20 06:20:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:20:12,811 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-20 06:20:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:12,814 INFO L225 Difference]: With dead ends: 254 [2020-10-20 06:20:12,814 INFO L226 Difference]: Without dead ends: 254 [2020-10-20 06:20:12,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:20:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-20 06:20:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 237. [2020-10-20 06:20:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-20 06:20:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 290 transitions. [2020-10-20 06:20:12,829 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 290 transitions. Word has length 21 [2020-10-20 06:20:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:12,830 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 290 transitions. [2020-10-20 06:20:12,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:20:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 290 transitions. [2020-10-20 06:20:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-20 06:20:12,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:12,833 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:13,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 06:20:13,057 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2081267767, now seen corresponding path program 1 times [2020-10-20 06:20:13,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:13,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242172072] [2020-10-20 06:20:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:20:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:13,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 06:20:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:13,258 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:13,258 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:13,260 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:13,261 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:13,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-20 06:20:13,382 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:13,383 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 41 [2020-10-20 06:20:13,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 06:20:13,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 06:20:13,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242172072] [2020-10-20 06:20:13,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 1) [2020-10-20 06:20:13,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [845033127] [2020-10-20 06:20:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 06:20:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 06:20:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:13,644 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:13,644 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:13,646 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:13,646 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:13,646 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-20 06:20:13,703 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:13,703 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2020-10-20 06:20:13,705 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:13,721 INFO L625 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2020-10-20 06:20:13,722 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 06:20:13,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2020-10-20 06:20:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-20 06:20:13,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:20:13,921 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_5| (Array (_ BitVec 32) (_ BitVec 1))) (v_nondet_tree_~n~0.base_BEFORE_CALL_7 (_ BitVec 32))) (or (= (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_BEFORE_CALL_7)) (exists ((v_prenex_1 (_ BitVec 32))) (and (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_5| v_prenex_1)) (not (= (_ bv1 1) (select |c_old(#valid)| v_prenex_1))))) (not (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_5| v_nondet_tree_~n~0.base_BEFORE_CALL_7))))) is different from false [2020-10-20 06:20:14,009 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_old(#valid)_BEFORE_CALL_6| (Array (_ BitVec 32) (_ BitVec 1))) (v_nondet_tree_~n~0.base_BEFORE_CALL_7 (_ BitVec 32))) (or (not (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_6| v_nondet_tree_~n~0.base_BEFORE_CALL_7))) (= (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_BEFORE_CALL_7)) (exists ((v_prenex_2 (_ BitVec 32))) (and (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_6| v_prenex_2)) (not (= (_ bv1 1) (select |c_old(#valid)| v_prenex_2))))))) is different from false [2020-10-20 06:20:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2020-10-20 06:20:14,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:20:14,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-20 06:20:14,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868989393] [2020-10-20 06:20:14,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:20:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:20:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:20:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=29, Unknown=2, NotChecked=22, Total=72 [2020-10-20 06:20:14,067 INFO L87 Difference]: Start difference. First operand 237 states and 290 transitions. Second operand 8 states. [2020-10-20 06:20:14,149 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_old(#valid)_BEFORE_CALL_6| (Array (_ BitVec 32) (_ BitVec 1))) (v_nondet_tree_~n~0.base_BEFORE_CALL_7 (_ BitVec 32))) (or (not (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_6| v_nondet_tree_~n~0.base_BEFORE_CALL_7))) (= (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_BEFORE_CALL_7)) (exists ((v_prenex_2 (_ BitVec 32))) (and (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_6| v_prenex_2)) (not (= (_ bv1 1) (select |c_old(#valid)| v_prenex_2))))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from false [2020-10-20 06:20:14,154 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_old(#valid)_BEFORE_CALL_6| (Array (_ BitVec 32) (_ BitVec 1))) (v_nondet_tree_~n~0.base_BEFORE_CALL_7 (_ BitVec 32))) (or (not (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_6| v_nondet_tree_~n~0.base_BEFORE_CALL_7))) (= (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_BEFORE_CALL_7)) (exists ((v_prenex_2 (_ BitVec 32))) (and (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_6| v_prenex_2)) (not (= (_ bv1 1) (select |c_old(#valid)| v_prenex_2)))))))) is different from false [2020-10-20 06:20:14,200 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_old(#valid)_BEFORE_CALL_5| (Array (_ BitVec 32) (_ BitVec 1))) (v_nondet_tree_~n~0.base_BEFORE_CALL_7 (_ BitVec 32))) (or (= (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_BEFORE_CALL_7)) (exists ((v_prenex_1 (_ BitVec 32))) (and (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_5| v_prenex_1)) (not (= (_ bv1 1) (select |c_old(#valid)| v_prenex_1))))) (not (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_5| v_nondet_tree_~n~0.base_BEFORE_CALL_7))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from false [2020-10-20 06:20:14,212 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_old(#valid)_BEFORE_CALL_5| (Array (_ BitVec 32) (_ BitVec 1))) (v_nondet_tree_~n~0.base_BEFORE_CALL_7 (_ BitVec 32))) (or (= (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_BEFORE_CALL_7)) (exists ((v_prenex_1 (_ BitVec 32))) (and (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_5| v_prenex_1)) (not (= (_ bv1 1) (select |c_old(#valid)| v_prenex_1))))) (not (= (_ bv1 1) (select |v_old(#valid)_BEFORE_CALL_5| v_nondet_tree_~n~0.base_BEFORE_CALL_7)))))) is different from false [2020-10-20 06:20:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:20:55,229 INFO L93 Difference]: Finished difference Result 278 states and 340 transitions. [2020-10-20 06:20:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 06:20:55,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-20 06:20:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:20:55,233 INFO L225 Difference]: With dead ends: 278 [2020-10-20 06:20:55,233 INFO L226 Difference]: Without dead ends: 278 [2020-10-20 06:20:55,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=42, Invalid=64, Unknown=8, NotChecked=126, Total=240 [2020-10-20 06:20:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-20 06:20:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 262. [2020-10-20 06:20:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-20 06:20:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 324 transitions. [2020-10-20 06:20:55,247 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 324 transitions. Word has length 38 [2020-10-20 06:20:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:20:55,247 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 324 transitions. [2020-10-20 06:20:55,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:20:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 324 transitions. [2020-10-20 06:20:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:20:55,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:20:55,249 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:20:55,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3 [2020-10-20 06:20:55,651 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, minErr1REQUIRES_VIOLATION, minErr0REQUIRES_VIOLATION, minErr5REQUIRES_VIOLATION, minErr4REQUIRES_VIOLATION, minErr3REQUIRES_VIOLATION, minErr2REQUIRES_VIOLATION, taskErr5REQUIRES_VIOLATION, taskErr7REQUIRES_VIOLATION, taskErr13ASSERT_VIOLATIONMEMORY_FREE, taskErr6REQUIRES_VIOLATION, taskErr8ASSERT_VIOLATIONMEMORY_FREE, taskErr9ASSERT_VIOLATIONMEMORY_FREE, taskErr10ASSERT_VIOLATIONMEMORY_FREE, taskErr0REQUIRES_VIOLATION, taskErr11ASSERT_VIOLATIONMEMORY_FREE, taskErr1REQUIRES_VIOLATION, taskErr3REQUIRES_VIOLATION, taskErr12ASSERT_VIOLATIONMEMORY_FREE, taskErr2REQUIRES_VIOLATION, taskErr4REQUIRES_VIOLATION, sizeErr0REQUIRES_VIOLATION, sizeErr1REQUIRES_VIOLATION, sizeErr2REQUIRES_VIOLATION, sizeErr3REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr5REQUIRES_VIOLATION, nondet_treeErr4REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_inorderErr4REQUIRES_VIOLATION, tree_inorderErr2REQUIRES_VIOLATION, tree_inorderErr3REQUIRES_VIOLATION, tree_inorderErr1REQUIRES_VIOLATION, tree_inorderErr6REQUIRES_VIOLATION, tree_inorderErr7REQUIRES_VIOLATION, tree_inorderErr5REQUIRES_VIOLATION, tree_inorderErr0REQUIRES_VIOLATION, tree_delErr10ASSERT_VIOLATIONMEMORY_FREE, tree_delErr0REQUIRES_VIOLATION, tree_delErr9ASSERT_VIOLATIONMEMORY_FREE, tree_delErr11REQUIRES_VIOLATION, tree_delErr8ASSERT_VIOLATIONMEMORY_FREE, tree_delErr12REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr3REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION, tree_delErr13REQUIRES_VIOLATION, tree_delErr4REQUIRES_VIOLATION, tree_delErr14REQUIRES_VIOLATION, tree_delErr5REQUIRES_VIOLATION, tree_delErr7REQUIRES_VIOLATION, tree_delErr6REQUIRES_VIOLATION]=== [2020-10-20 06:20:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:20:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1275297701, now seen corresponding path program 1 times [2020-10-20 06:20:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:20:55,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284290915] [2020-10-20 06:20:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-20 06:20:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 06:20:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:55,807 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:55,807 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:55,815 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:55,818 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:55,818 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:55,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:55,825 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:55,825 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2020-10-20 06:20:55,931 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:55,931 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2020-10-20 06:20:55,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 06:20:55,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284290915] [2020-10-20 06:20:55,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 1) [2020-10-20 06:20:55,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1276856170] [2020-10-20 06:20:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 06:20:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:56,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 06:20:56,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:56,157 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:56,158 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:56,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:56,170 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:56,170 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:56,178 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:56,178 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:56,179 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2020-10-20 06:20:56,256 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:56,257 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2020-10-20 06:20:56,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 06:20:56,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 1) [2020-10-20 06:20:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709416834] [2020-10-20 06:20:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:20:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:20:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 06:20:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:20:56,374 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:20:56,374 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:56,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:56,382 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:20:56,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-20 06:20:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 06:20:56,441 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2020-10-20 06:20:56,442 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:20:56,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:56,470 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:20:56,471 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2020-10-20 06:20:56,472 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 1) [2020-10-20 06:20:56,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:20:56,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 06:20:56,472 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 06:20:56,472 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:20:57,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 06:20:57,102 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 06:20:57,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:20:57 BoogieIcfgContainer [2020-10-20 06:20:57,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:20:57,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:20:57,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:20:57,105 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:20:57,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:20:04" (3/4) ... [2020-10-20 06:20:57,109 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:20:57,109 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:20:57,111 INFO L168 Benchmark]: Toolchain (without parser) took 54788.43 ms. Allocated memory was 35.7 MB in the beginning and 73.4 MB in the end (delta: 37.7 MB). Free memory was 15.6 MB in the beginning and 13.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 39.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,111 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 34.1 MB. Free memory was 9.7 MB in the beginning and 9.6 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 564.85 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 14.8 MB in the beginning and 19.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,113 INFO L168 Benchmark]: Boogie Preprocessor took 65.65 ms. Allocated memory is still 44.0 MB. Free memory was 19.8 MB in the beginning and 16.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,113 INFO L168 Benchmark]: RCFGBuilder took 1110.45 ms. Allocated memory was 44.0 MB in the beginning and 47.2 MB in the end (delta: 3.1 MB). Free memory was 16.8 MB in the beginning and 28.9 MB in the end (delta: -12.0 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,114 INFO L168 Benchmark]: TraceAbstraction took 53031.29 ms. Allocated memory was 47.2 MB in the beginning and 73.4 MB in the end (delta: 26.2 MB). Free memory was 28.2 MB in the beginning and 14.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 39.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,114 INFO L168 Benchmark]: Witness Printer took 5.48 ms. Allocated memory is still 73.4 MB. Free memory was 14.5 MB in the beginning and 13.6 MB in the end (delta: 885.8 kB). Peak memory consumption was 885.8 kB. Max. memory is 14.3 GB. [2020-10-20 06:20:57,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 34.1 MB. Free memory was 9.7 MB in the beginning and 9.6 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 564.85 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 14.8 MB in the beginning and 19.8 MB in the end (delta: -5.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 65.65 ms. Allocated memory is still 44.0 MB. Free memory was 19.8 MB in the beginning and 16.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. * RCFGBuilder took 1110.45 ms. Allocated memory was 44.0 MB in the beginning and 47.2 MB in the end (delta: 3.1 MB). Free memory was 16.8 MB in the beginning and 28.9 MB in the end (delta: -12.0 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 53031.29 ms. Allocated memory was 47.2 MB in the beginning and 73.4 MB in the end (delta: 26.2 MB). Free memory was 28.2 MB in the beginning and 14.5 MB in the end (delta: 13.7 MB). Peak memory consumption was 39.9 MB. Max. memory is 14.3 GB. * Witness Printer took 5.48 ms. Allocated memory is still 73.4 MB. Free memory was 14.5 MB in the beginning and 13.6 MB in the end (delta: 885.8 kB). Peak memory consumption was 885.8 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L102] 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 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; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 189 locations, 55 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 52.9s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 47.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1303 SDtfs, 772 SDslu, 3327 SDs, 0 SdLazy, 1252 SolverSat, 281 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 41.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 233 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 222 ConstructedInterpolants, 33 QuantifiedInterpolants, 26834 SizeOfPredicates, 28 NumberOfNonLiveVariables, 779 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 65/86 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...