./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 20ed64ec 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_1.5.800.v20200727-1323.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 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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_1.5.800.v20200727-1323.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 0.2.1-dev-20ed64e [2021-08-27 04:30:05,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:30:05,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:30:05,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:30:05,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:30:05,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:30:05,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:30:05,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:30:05,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:30:05,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:30:05,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:30:05,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:30:05,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:30:05,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:30:05,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:30:05,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:30:05,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:30:05,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:30:05,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:30:05,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:30:05,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:30:05,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:30:05,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:30:05,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:30:05,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:30:05,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:30:05,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:30:05,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:30:05,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:30:05,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:30:05,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:30:05,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:30:05,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:30:05,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:30:05,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:30:05,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:30:05,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:30:05,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:30:05,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:30:05,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:30:05,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:30:05,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-27 04:30:05,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:30:05,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:30:05,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:30:05,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:30:05,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:30:05,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:30:05,536 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:30:05,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:30:05,536 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:30:05,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:30:05,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:30:05,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:30:05,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:30:05,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:30:05,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:30:05,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:30:05,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:30:05,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:30:05,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:30:05,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:30:05,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:30:05,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:30:05,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-08-27 04:30:05,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:30:05,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:30:05,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:30:05,782 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:30:05,783 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:30:05,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-27 04:30:05,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6d2fbbc8/965b37839c064f0fa8ce709b21277876/FLAG752f6667e [2021-08-27 04:30:06,179 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:30:06,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-27 04:30:06,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6d2fbbc8/965b37839c064f0fa8ce709b21277876/FLAG752f6667e [2021-08-27 04:30:06,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6d2fbbc8/965b37839c064f0fa8ce709b21277876 [2021-08-27 04:30:06,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:30:06,655 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:30:06,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:30:06,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:30:06,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:30:06,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:30:06" (1/1) ... [2021-08-27 04:30:06,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58041952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:06, skipping insertion in model container [2021-08-27 04:30:06,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:30:06" (1/1) ... [2021-08-27 04:30:06,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:30:06,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:30:06,880 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-27 04:30:06,912 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:06,915 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:06,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:30:07,000 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-08-27 04:30:07,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b1c217a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:07, skipping insertion in model container [2021-08-27 04:30:07,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:30:07,013 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-08-27 04:30:07,015 INFO L168 Benchmark]: Toolchain (without parser) took 359.09 ms. Allocated memory is still 67.1 MB. Free memory was 51.6 MB in the beginning and 51.1 MB in the end (delta: 442.5 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:07,016 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 48.2 MB. Free memory was 30.5 MB in the beginning and 30.5 MB in the end (delta: 63.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:30:07,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.98 ms. Allocated memory is still 67.1 MB. Free memory was 51.4 MB in the beginning and 51.1 MB in the end (delta: 258.2 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:07,020 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 48.2 MB. Free memory was 30.5 MB in the beginning and 30.5 MB in the end (delta: 63.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 354.98 ms. Allocated memory is still 67.1 MB. Free memory was 51.4 MB in the beginning and 51.1 MB in the end (delta: 258.2 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:30:09,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:30:09,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:30:09,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:30:09,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:30:09,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:30:09,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:30:09,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:30:09,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:30:09,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:30:09,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:30:09,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:30:09,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:30:09,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:30:09,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:30:09,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:30:09,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:30:09,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:30:09,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:30:09,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:30:09,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:30:09,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:30:09,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:30:09,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:30:09,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:30:09,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:30:09,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:30:09,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:30:09,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:30:09,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:30:09,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:30:09,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:30:09,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:30:09,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:30:09,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:30:09,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:30:09,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:30:09,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:30:09,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:30:09,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:30:09,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:30:09,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-08-27 04:30:09,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:30:09,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:30:09,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:30:09,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:30:09,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:30:09,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:30:09,303 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:30:09,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:30:09,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:30:09,304 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:30:09,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:30:09,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:30:09,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:30:09,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:30:09,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:30:09,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:30:09,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:30:09,305 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 04:30:09,305 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 04:30:09,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:30:09,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:30:09,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:30:09,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:30:09,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:30:09,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:30:09,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:30:09,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:30:09,307 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 04:30:09,307 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 04:30:09,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:30:09,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 04:30:09,308 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-08-27 04:30:09,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:30:09,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:30:09,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:30:09,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:30:09,596 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:30:09,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-27 04:30:09,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7493e5305/4f61ead547114657bbc906e6f8322470/FLAG34d01059f [2021-08-27 04:30:10,017 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:30:10,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-27 04:30:10,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7493e5305/4f61ead547114657bbc906e6f8322470/FLAG34d01059f [2021-08-27 04:30:10,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7493e5305/4f61ead547114657bbc906e6f8322470 [2021-08-27 04:30:10,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:30:10,048 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:30:10,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:30:10,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:30:10,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:30:10,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7778bab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10, skipping insertion in model container [2021-08-27 04:30:10,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:30:10,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:30:10,180 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-27 04:30:10,192 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:10,194 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:10,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:30:10,235 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-08-27 04:30:10,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:30:10,277 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-27 04:30:10,285 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:10,286 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:10,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:30:10,306 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:30:10,314 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-27 04:30:10,321 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:10,322 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:30:10,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:30:10,351 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:30:10,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10 WrapperNode [2021-08-27 04:30:10,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:30:10,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:30:10,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:30:10,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:30:10,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:30:10,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:30:10,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:30:10,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:30:10,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (1/1) ... [2021-08-27 04:30:10,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:30:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:30:10,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:30:10,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:30:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:30:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:30:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-08-27 04:30:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-08-27 04:30:10,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:30:10,492 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-08-27 04:30:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 04:30:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-08-27 04:30:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-08-27 04:30:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-27 04:30:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:30:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:30:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 04:30:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:30:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 04:30:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 04:30:11,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:30:11,210 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 04:30:11,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:30:11 BoogieIcfgContainer [2021-08-27 04:30:11,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:30:11,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:30:11,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:30:11,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:30:11,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:30:10" (1/3) ... [2021-08-27 04:30:11,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b65a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:30:11, skipping insertion in model container [2021-08-27 04:30:11,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:30:10" (2/3) ... [2021-08-27 04:30:11,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b65a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:30:11, skipping insertion in model container [2021-08-27 04:30:11,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:30:11" (3/3) ... [2021-08-27 04:30:11,231 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-08-27 04:30:11,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:30:11,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-08-27 04:30:11,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:30:11,277 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:30:11,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-08-27 04:30:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 92 states have (on average 1.7391304347826086) internal successors, (160), 147 states have internal predecessors, (160), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-08-27 04:30:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 04:30:11,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:11,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:11,294 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:11,297 INFO L82 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-08-27 04:30:11,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:11,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079357122] [2021-08-27 04:30:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:11,306 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:11,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:11,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 04:30:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 04:30:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:11,486 INFO L388 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 [2021-08-27 04:30:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:11,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:11,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079357122] [2021-08-27 04:30:11,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079357122] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:11,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:11,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 04:30:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743345174] [2021-08-27 04:30:11,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 04:30:11,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:30:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 04:30:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:30:11,537 INFO L87 Difference]: Start difference. First operand has 185 states, 92 states have (on average 1.7391304347826086) internal successors, (160), 147 states have internal predecessors, (160), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:30:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:11,756 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-08-27 04:30:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:30:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-08-27 04:30:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:11,764 INFO L225 Difference]: With dead ends: 186 [2021-08-27 04:30:11,765 INFO L226 Difference]: Without dead ends: 182 [2021-08-27 04:30:11,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:30:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-27 04:30:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-08-27 04:30:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 143 states have internal predecessors, (151), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-08-27 04:30:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-08-27 04:30:11,819 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-08-27 04:30:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:11,819 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-08-27 04:30:11,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:30:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-08-27 04:30:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 04:30:11,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:11,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:11,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-27 04:30:12,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 04:30:12,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-08-27 04:30:12,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:12,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656046118] [2021-08-27 04:30:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:12,029 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:12,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:12,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 04:30:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:12,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 04:30:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:12,161 INFO L388 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 [2021-08-27 04:30:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:12,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:12,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:12,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656046118] [2021-08-27 04:30:12,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656046118] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:12,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:12,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-27 04:30:12,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042639491] [2021-08-27 04:30:12,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:30:12,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:30:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:30:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:30:12,249 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:30:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:12,610 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-08-27 04:30:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:30:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-08-27 04:30:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:12,612 INFO L225 Difference]: With dead ends: 179 [2021-08-27 04:30:12,612 INFO L226 Difference]: Without dead ends: 179 [2021-08-27 04:30:12,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:30:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-27 04:30:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-08-27 04:30:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 142 states have internal predecessors, (150), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-08-27 04:30:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-08-27 04:30:12,620 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-08-27 04:30:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:12,621 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-08-27 04:30:12,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:30:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-08-27 04:30:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:30:12,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:12,621 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:12,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:12,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 04:30:12,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:12,829 INFO L82 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-08-27 04:30:12,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:12,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62626029] [2021-08-27 04:30:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:12,830 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:12,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:12,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 04:30:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:30:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:13,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:13,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62626029] [2021-08-27 04:30:13,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62626029] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:13,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:13,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-08-27 04:30:13,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331350924] [2021-08-27 04:30:13,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:30:13,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:30:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:30:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:30:13,133 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:30:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:13,242 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-08-27 04:30:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:30:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-08-27 04:30:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:13,244 INFO L225 Difference]: With dead ends: 244 [2021-08-27 04:30:13,244 INFO L226 Difference]: Without dead ends: 244 [2021-08-27 04:30:13,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:30:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-27 04:30:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-08-27 04:30:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 121 states have (on average 1.6198347107438016) internal successors, (196), 174 states have internal predecessors, (196), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-08-27 04:30:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-08-27 04:30:13,255 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-08-27 04:30:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:13,255 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-08-27 04:30:13,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 04:30:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-08-27 04:30:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:30:13,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:13,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:13,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:13,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 04:30:13,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:13,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-08-27 04:30:13,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:13,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058376645] [2021-08-27 04:30:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:13,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:13,466 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:13,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 04:30:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 04:30:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:13,576 INFO L388 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 [2021-08-27 04:30:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:13,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:13,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:13,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058376645] [2021-08-27 04:30:13,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058376645] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:13,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:13,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-27 04:30:13,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484546672] [2021-08-27 04:30:13,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:30:13,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:30:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:30:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:30:13,691 INFO L87 Difference]: Start difference. First operand 227 states and 278 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 04:30:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:14,145 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-08-27 04:30:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:30:14,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 14 [2021-08-27 04:30:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:14,148 INFO L225 Difference]: With dead ends: 225 [2021-08-27 04:30:14,148 INFO L226 Difference]: Without dead ends: 225 [2021-08-27 04:30:14,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:30:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-27 04:30:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-08-27 04:30:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 121 states have (on average 1.603305785123967) internal successors, (194), 172 states have internal predecessors, (194), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-08-27 04:30:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2021-08-27 04:30:14,156 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 14 [2021-08-27 04:30:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:14,156 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2021-08-27 04:30:14,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 04:30:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2021-08-27 04:30:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:30:14,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:14,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:14,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:14,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 04:30:14,364 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-08-27 04:30:14,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:14,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044190347] [2021-08-27 04:30:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:14,365 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:14,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:14,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 04:30:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 04:30:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:14,488 INFO L388 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 [2021-08-27 04:30:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:14,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:14,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:14,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044190347] [2021-08-27 04:30:14,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044190347] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:14,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:14,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 04:30:14,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176150822] [2021-08-27 04:30:14,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:30:14,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:30:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:30:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:30:14,731 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:30:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:15,495 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2021-08-27 04:30:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:30:15,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 14 [2021-08-27 04:30:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:15,497 INFO L225 Difference]: With dead ends: 237 [2021-08-27 04:30:15,497 INFO L226 Difference]: Without dead ends: 237 [2021-08-27 04:30:15,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:30:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-27 04:30:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-08-27 04:30:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 124 states have (on average 1.5887096774193548) internal successors, (197), 174 states have internal predecessors, (197), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-08-27 04:30:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-08-27 04:30:15,527 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-08-27 04:30:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:15,527 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-08-27 04:30:15,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:30:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-08-27 04:30:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:30:15,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:15,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:15,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 04:30:15,736 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-08-27 04:30:15,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:15,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355265997] [2021-08-27 04:30:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:15,737 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:15,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:15,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:15,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 04:30:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:15,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:30:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:15,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:30:16,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:16,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355265997] [2021-08-27 04:30:16,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355265997] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:30:16,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:16,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-08-27 04:30:16,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007166896] [2021-08-27 04:30:16,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:30:16,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:30:16,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:30:16,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:30:16,071 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 04:30:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:30:16,174 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2021-08-27 04:30:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:30:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-08-27 04:30:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:30:16,176 INFO L225 Difference]: With dead ends: 250 [2021-08-27 04:30:16,176 INFO L226 Difference]: Without dead ends: 250 [2021-08-27 04:30:16,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:30:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-27 04:30:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-08-27 04:30:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 127 states have (on average 1.5748031496062993) internal successors, (200), 177 states have internal predecessors, (200), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-08-27 04:30:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-08-27 04:30:16,183 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 21 [2021-08-27 04:30:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:30:16,183 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-08-27 04:30:16,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 04:30:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-08-27 04:30:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 04:30:16,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:30:16,184 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:30:16,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:16,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 04:30:16,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-27 04:30:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:30:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1907346070, now seen corresponding path program 1 times [2021-08-27 04:30:16,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:30:16,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965769597] [2021-08-27 04:30:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:16,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:30:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:30:16,394 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 04:30:16,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 04:30:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:30:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:16,648 INFO L388 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 [2021-08-27 04:30:16,653 INFO L388 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 [2021-08-27 04:30:16,861 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:30:16,861 INFO L388 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 29 treesize of output 31 [2021-08-27 04:30:16,868 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:30:16,869 INFO L388 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 28 treesize of output 28 [2021-08-27 04:30:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:30:16,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:35,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:30:35,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965769597] [2021-08-27 04:30:35,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:30:35,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [24697113] [2021-08-27 04:30:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:35,133 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-27 04:30:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-27 04:30:35,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-27 04:30:35,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-08-27 04:30:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:30:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:35,489 INFO L388 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 [2021-08-27 04:30:35,493 INFO L388 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 [2021-08-27 04:30:35,676 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:30:35,676 INFO L388 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 27 treesize of output 29 [2021-08-27 04:30:35,690 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:30:35,690 INFO L388 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 26 treesize of output 26 [2021-08-27 04:30:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:30:35,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:40,441 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_6 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_8 (_ BitVec 32))) (or (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6))) (or (not (bvule .cse0 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_8))) (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6) .cse0)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))) (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6))) (and (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_6) .cse1) (bvule .cse1 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_8)))))) is different from false [2021-08-27 04:30:41,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:30:41,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347530465] [2021-08-27 04:30:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:41,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:30:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:30:41,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:30:41,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:30:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:41,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:30:41,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:41,781 INFO L388 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 [2021-08-27 04:30:42,017 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:30:42,018 INFO L388 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 27 treesize of output 29 [2021-08-27 04:30:42,025 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:30:42,026 INFO L388 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 26 treesize of output 26 [2021-08-27 04:30:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:30:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:56,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:30:56,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:56,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-27 04:30:56,144 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-27 04:30:56,144 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-27 04:30:56,147 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr3REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr0REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr1REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr2REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr3REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr4REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr5REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr6REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr7REQUIRES_VIOLATION [2021-08-27 04:30:56,148 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr11REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr12REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr13REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr14REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr0REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr1REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr2REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr3REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr4REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr5REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr0REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr1REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr2REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr4REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr5REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr0REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr1REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr2REQUIRES_VIOLATION [2021-08-27 04:30:56,149 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr3REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr4REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr5REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr6REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr7REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr0REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr1REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr2REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr3REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr0REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr1REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr2REQUIRES_VIOLATION [2021-08-27 04:30:56,150 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr3REQUIRES_VIOLATION [2021-08-27 04:30:56,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr4REQUIRES_VIOLATION [2021-08-27 04:30:56,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr5REQUIRES_VIOLATION [2021-08-27 04:30:56,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr6REQUIRES_VIOLATION [2021-08-27 04:30:56,151 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr7REQUIRES_VIOLATION [2021-08-27 04:30:56,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:56,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:56,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:30:56,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:30:56,768 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:30:56,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:30:56 BoogieIcfgContainer [2021-08-27 04:30:56,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:30:56,775 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:30:56,775 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:30:56,775 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:30:56,775 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:30:11" (3/4) ... [2021-08-27 04:30:56,777 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 04:30:56,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:30:56,778 INFO L168 Benchmark]: Toolchain (without parser) took 46729.92 ms. Allocated memory was 58.7 MB in the beginning and 148.9 MB in the end (delta: 90.2 MB). Free memory was 43.6 MB in the beginning and 54.3 MB in the end (delta: -10.7 MB). Peak memory consumption was 78.8 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:56,778 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory is still 28.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:30:56,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.93 ms. Allocated memory is still 58.7 MB. Free memory was 43.4 MB in the beginning and 39.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:56,778 INFO L168 Benchmark]: Boogie Preprocessor took 76.88 ms. Allocated memory is still 58.7 MB. Free memory was 39.1 MB in the beginning and 36.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:56,783 INFO L168 Benchmark]: RCFGBuilder took 782.29 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 36.6 MB in the beginning and 58.2 MB in the end (delta: -21.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:56,783 INFO L168 Benchmark]: TraceAbstraction took 45561.40 ms. Allocated memory was 81.8 MB in the beginning and 148.9 MB in the end (delta: 67.1 MB). Free memory was 57.7 MB in the beginning and 54.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 71.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:56,783 INFO L168 Benchmark]: Witness Printer took 2.50 ms. Allocated memory is still 148.9 MB. Free memory is still 54.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:30:56,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 46.1 MB. Free memory is still 28.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.93 ms. Allocated memory is still 58.7 MB. Free memory was 43.4 MB in the beginning and 39.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.88 ms. Allocated memory is still 58.7 MB. Free memory was 39.1 MB in the beginning and 36.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 782.29 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 36.6 MB in the beginning and 58.2 MB in the end (delta: -21.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45561.40 ms. Allocated memory was 81.8 MB in the beginning and 148.9 MB in the end (delta: 67.1 MB). Free memory was 57.7 MB in the beginning and 54.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 71.1 MB. Max. memory is 16.1 GB. * Witness Printer took 2.50 ms. Allocated memory is still 148.9 MB. Free memory is still 54.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] 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 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() - UnprovableResult [Line: 101]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 52]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 52]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 42]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 42]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 67]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 67]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 188 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 45495.6ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 10.5ms, AutomataDifference: 2045.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1126 SDtfs, 400 SDslu, 3115 SDs, 0 SdLazy, 804 SolverSat, 127 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1569.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 210.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=6, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 106.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 78.7ms SsaConstructionTime, 118.8ms SatisfiabilityAnalysisTime, 1092.7ms InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 148 ConstructedInterpolants, 6 QuantifiedInterpolants, 640 SizeOfPredicates, 8 NumberOfNonLiveVariables, 552 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 4/4 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 [2021-08-27 04:30:56,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...