./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/verifythis/tree_del_iter.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_iter.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 3996209b60f87d3e4d0d43d86633911b8e11add8 .................................................................................................................................. 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_iter.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 3996209b60f87d3e4d0d43d86633911b8e11add8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 04:29:35,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:29:35,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:29:35,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:29:35,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:29:35,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:29:35,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:29:35,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:29:35,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:29:35,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:29:35,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:29:35,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:29:35,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:29:35,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:29:35,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:29:35,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:29:35,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:29:35,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:29:35,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:29:35,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:29:35,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:29:35,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:29:35,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:29:35,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:29:35,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:29:35,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:29:35,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:29:35,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:29:35,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:29:35,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:29:35,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:29:35,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:29:35,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:29:35,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:29:35,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:29:35,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:29:35,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:29:35,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:29:35,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:29:35,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:29:35,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:29:35,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-27 04:29:35,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:29:35,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:29:35,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:29:35,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:29:35,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:29:35,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:29:35,483 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:29:35,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:29:35,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:29:35,483 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:29:35,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:29:35,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:29:35,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:29:35,484 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:29:35,485 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:29:35,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:29:35,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:29:35,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:29:35,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:29:35,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:29:35,486 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:29:35,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:29:35,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:29:35,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:29:35,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:29:35,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:29:35,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:29:35,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:29:35,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3996209b60f87d3e4d0d43d86633911b8e11add8 [2021-08-27 04:29:35,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:29:35,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:29:35,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:29:35,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:29:35,772 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:29:35,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_iter.c [2021-08-27 04:29:35,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5143d9a/87c523a912a949638af0214feb17ec23/FLAG6431315b7 [2021-08-27 04:29:36,211 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:29:36,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_iter.c [2021-08-27 04:29:36,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5143d9a/87c523a912a949638af0214feb17ec23/FLAG6431315b7 [2021-08-27 04:29:36,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5143d9a/87c523a912a949638af0214feb17ec23 [2021-08-27 04:29:36,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:29:36,235 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:29:36,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:29:36,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:29:36,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:29:36,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:29:36" (1/1) ... [2021-08-27 04:29:36,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb97552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:36, skipping insertion in model container [2021-08-27 04:29:36,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:29:36" (1/1) ... [2021-08-27 04:29:36,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:29:36,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:29:36,358 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_iter.c[586,599] [2021-08-27 04:29:36,370 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:29:36,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:29:36,415 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 04:29:36,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d7d0636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:36, skipping insertion in model container [2021-08-27 04:29:36,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:29:36,429 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-08-27 04:29:36,431 INFO L168 Benchmark]: Toolchain (without parser) took 194.97 ms. Allocated memory is still 56.6 MB. Free memory was 35.6 MB in the beginning and 40.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:36,431 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:29:36,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.14 ms. Allocated memory is still 56.6 MB. Free memory was 35.4 MB in the beginning and 40.9 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:36,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.14 ms. Allocated memory is still 56.6 MB. Free memory was 35.4 MB in the beginning and 40.9 MB in the end (delta: -5.5 MB). 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 04:29:37,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:29:37,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:29:37,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:29:37,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:29:37,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:29:37,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:29:37,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:29:37,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:29:37,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:29:37,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:29:37,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:29:37,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:29:37,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:29:37,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:29:37,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:29:37,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:29:37,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:29:37,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:29:37,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:29:37,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:29:37,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:29:37,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:29:37,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:29:37,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:29:37,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:29:37,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:29:37,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:29:37,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:29:37,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:29:37,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:29:37,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:29:37,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:29:37,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:29:37,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:29:37,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:29:37,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:29:37,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:29:37,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:29:37,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:29:37,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:29:37,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-08-27 04:29:37,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:29:37,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:29:37,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:29:37,871 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:29:37,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:29:37,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:29:37,873 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:29:37,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:29:37,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:29:37,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:29:37,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:29:37,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:29:37,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:29:37,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:29:37,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:29:37,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:29:37,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:29:37,875 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 04:29:37,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 04:29:37,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:29:37,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:29:37,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:29:37,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:29:37,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:29:37,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:29:37,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:29:37,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:29:37,877 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 04:29:37,877 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 04:29:37,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:29:37,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 04:29:37,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3996209b60f87d3e4d0d43d86633911b8e11add8 [2021-08-27 04:29:38,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:29:38,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:29:38,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:29:38,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:29:38,140 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:29:38,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_iter.c [2021-08-27 04:29:38,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb7f2ac9/b4b6c29480794f8a900ca50e583ec766/FLAG4776b8a3d [2021-08-27 04:29:38,577 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:29:38,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_iter.c [2021-08-27 04:29:38,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb7f2ac9/b4b6c29480794f8a900ca50e583ec766/FLAG4776b8a3d [2021-08-27 04:29:38,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecb7f2ac9/b4b6c29480794f8a900ca50e583ec766 [2021-08-27 04:29:38,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:29:38,608 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:29:38,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:29:38,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:29:38,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:29:38,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:38,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225a3025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38, skipping insertion in model container [2021-08-27 04:29:38,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:38,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:29:38,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:29:38,754 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_iter.c[586,599] [2021-08-27 04:29:38,786 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:29:38,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:29:38,845 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-08-27 04:29:38,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:29:38,859 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_iter.c[586,599] [2021-08-27 04:29:38,872 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:29:38,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:29:38,897 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:29:38,907 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_iter.c[586,599] [2021-08-27 04:29:38,925 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-27 04:29:38,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:29:38,946 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:29:38,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38 WrapperNode [2021-08-27 04:29:38,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:29:38,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:29:38,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:29:38,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:29:38,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:38,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:38,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:38,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:38,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:39,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:39,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:39,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:29:39,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:29:39,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:29:39,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:29:39,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (1/1) ... [2021-08-27 04:29:39,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:29:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:39,037 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 04:29:39,056 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 04:29:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:29:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:29:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-08-27 04:29:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 04:29:39,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-27 04:29:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-08-27 04:29:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-08-27 04:29:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-08-27 04:29:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-08-27 04:29:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-08-27 04:29:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-08-27 04:29:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:29:39,077 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-27 04:29:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:29:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:29:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:29:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:29:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-08-27 04:29:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 04:29:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 04:29:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 04:29:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-08-27 04:29:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 04:29:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 04:29:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:29:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:29:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 04:29:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:29:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 04:29:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 04:29:39,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:29:39,899 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 04:29:39,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:29:39 BoogieIcfgContainer [2021-08-27 04:29:39,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:29:39,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:29:39,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:29:39,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:29:39,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:29:38" (1/3) ... [2021-08-27 04:29:39,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec70c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:29:39, skipping insertion in model container [2021-08-27 04:29:39,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:29:38" (2/3) ... [2021-08-27 04:29:39,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec70c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:29:39, skipping insertion in model container [2021-08-27 04:29:39,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:29:39" (3/3) ... [2021-08-27 04:29:39,908 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-08-27 04:29:39,912 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:29:39,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2021-08-27 04:29:39,947 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:29:39,952 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 04:29:39,953 INFO L340 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2021-08-27 04:29:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 104 states have (on average 1.7596153846153846) internal successors, (183), 168 states have internal predecessors, (183), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-08-27 04:29:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 04:29:39,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:39,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:39,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash -682991689, now seen corresponding path program 1 times [2021-08-27 04:29:39,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:39,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261122725] [2021-08-27 04:29:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:39,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:39,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:39,998 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 04:29:39,999 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 04:29:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 04:29:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:40,196 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 04:29:40,208 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 04:29:40,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:40,266 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 04:29:40,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:40,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261122725] [2021-08-27 04:29:40,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261122725] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:29:40,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:29:40,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 04:29:40,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445890327] [2021-08-27 04:29:40,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 04:29:40,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:29:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 04:29:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:29:40,287 INFO L87 Difference]: Start difference. First operand has 205 states, 104 states have (on average 1.7596153846153846) internal successors, (183), 168 states have internal predecessors, (183), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) 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 04:29:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:40,495 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2021-08-27 04:29:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:29:40,498 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 04:29:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:40,506 INFO L225 Difference]: With dead ends: 206 [2021-08-27 04:29:40,506 INFO L226 Difference]: Without dead ends: 202 [2021-08-27 04:29:40,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:29:40,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-27 04:29:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2021-08-27 04:29:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 102 states have (on average 1.696078431372549) internal successors, (173), 164 states have internal predecessors, (173), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-08-27 04:29:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2021-08-27 04:29:40,547 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 8 [2021-08-27 04:29:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:40,548 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2021-08-27 04:29:40,548 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 04:29:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2021-08-27 04:29:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 04:29:40,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:40,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:40,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:40,751 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 04:29:40,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:40,752 INFO L82 PathProgramCache]: Analyzing trace with hash -682991688, now seen corresponding path program 1 times [2021-08-27 04:29:40,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:40,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352776467] [2021-08-27 04:29:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:40,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:40,754 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 04:29:40,756 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 04:29:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 04:29:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:40,867 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 04:29:40,878 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 04:29:40,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:40,954 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 04:29:40,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:40,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352776467] [2021-08-27 04:29:40,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352776467] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:29:40,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:29:40,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-27 04:29:40,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522867405] [2021-08-27 04:29:40,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:29:40,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:29:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:29:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:29:40,958 INFO L87 Difference]: Start difference. First operand 200 states and 222 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 04:29:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:41,216 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2021-08-27 04:29:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:29:41,217 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 04:29:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:41,218 INFO L225 Difference]: With dead ends: 199 [2021-08-27 04:29:41,218 INFO L226 Difference]: Without dead ends: 199 [2021-08-27 04:29:41,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:29:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-27 04:29:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-08-27 04:29:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 102 states have (on average 1.6862745098039216) internal successors, (172), 163 states have internal predecessors, (172), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-08-27 04:29:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 221 transitions. [2021-08-27 04:29:41,227 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 221 transitions. Word has length 8 [2021-08-27 04:29:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:41,228 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 221 transitions. [2021-08-27 04:29:41,228 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 04:29:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 221 transitions. [2021-08-27 04:29:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:29:41,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:41,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:41,239 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 04:29:41,437 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 04:29:41,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:41,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1324839054, now seen corresponding path program 1 times [2021-08-27 04:29:41,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:41,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881355430] [2021-08-27 04:29:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:41,439 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:41,440 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 04:29:41,441 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 04:29:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:41,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:29:41,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:41,691 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 04:29:41,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:41,794 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 04:29:41,794 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:41,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881355430] [2021-08-27 04:29:41,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881355430] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:29:41,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:29:41,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-08-27 04:29:41,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217933353] [2021-08-27 04:29:41,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:29:41,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:29:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:29:41,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:29:41,797 INFO L87 Difference]: Start difference. First operand 199 states and 221 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 04:29:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:41,911 INFO L93 Difference]: Finished difference Result 264 states and 303 transitions. [2021-08-27 04:29:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:29:41,912 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 04:29:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:41,913 INFO L225 Difference]: With dead ends: 264 [2021-08-27 04:29:41,913 INFO L226 Difference]: Without dead ends: 264 [2021-08-27 04:29:41,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:29:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-27 04:29:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 247. [2021-08-27 04:29:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 133 states have (on average 1.6390977443609023) internal successors, (218), 195 states have internal predecessors, (218), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2021-08-27 04:29:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 298 transitions. [2021-08-27 04:29:41,925 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 298 transitions. Word has length 15 [2021-08-27 04:29:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:41,925 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 298 transitions. [2021-08-27 04:29:41,925 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 04:29:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 298 transitions. [2021-08-27 04:29:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:29:41,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:41,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:41,933 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 04:29:42,132 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 04:29:42,133 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1881147096, now seen corresponding path program 1 times [2021-08-27 04:29:42,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:42,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132351150] [2021-08-27 04:29:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:42,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:42,135 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 04:29:42,142 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 04:29:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 04:29:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:42,251 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 04:29:42,287 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 04:29:42,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:42,383 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 04:29:42,383 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:42,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132351150] [2021-08-27 04:29:42,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132351150] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:29:42,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:29:42,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-27 04:29:42,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281322943] [2021-08-27 04:29:42,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:29:42,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:29:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:29:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:29:42,389 INFO L87 Difference]: Start difference. First operand 247 states and 298 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 04:29:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:42,904 INFO L93 Difference]: Finished difference Result 245 states and 296 transitions. [2021-08-27 04:29:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:29:42,904 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 04:29:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:42,906 INFO L225 Difference]: With dead ends: 245 [2021-08-27 04:29:42,906 INFO L226 Difference]: Without dead ends: 245 [2021-08-27 04:29:42,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:29:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-27 04:29:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-08-27 04:29:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 193 states have internal predecessors, (216), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2021-08-27 04:29:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 296 transitions. [2021-08-27 04:29:42,914 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 296 transitions. Word has length 14 [2021-08-27 04:29:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:42,914 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 296 transitions. [2021-08-27 04:29:42,915 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 04:29:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 296 transitions. [2021-08-27 04:29:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:29:42,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:42,915 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:42,933 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 04:29:43,121 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 04:29:43,122 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1881147095, now seen corresponding path program 1 times [2021-08-27 04:29:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:43,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891999118] [2021-08-27 04:29:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:43,123 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:43,123 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 04:29:43,124 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 04:29:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 04:29:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:43,243 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 04:29:43,294 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 04:29:43,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:43,497 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 04:29:43,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:43,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891999118] [2021-08-27 04:29:43,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891999118] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:29:43,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:29:43,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 04:29:43,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016057465] [2021-08-27 04:29:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:29:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:29:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:29:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:29:43,499 INFO L87 Difference]: Start difference. First operand 245 states and 296 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 04:29:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:44,419 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2021-08-27 04:29:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:29:44,420 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 04:29:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:44,422 INFO L225 Difference]: With dead ends: 257 [2021-08-27 04:29:44,422 INFO L226 Difference]: Without dead ends: 257 [2021-08-27 04:29:44,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:29:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-27 04:29:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2021-08-27 04:29:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 136 states have (on average 1.6102941176470589) internal successors, (219), 195 states have internal predecessors, (219), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2021-08-27 04:29:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 302 transitions. [2021-08-27 04:29:44,430 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 302 transitions. Word has length 14 [2021-08-27 04:29:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:44,430 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 302 transitions. [2021-08-27 04:29:44,430 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 04:29:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 302 transitions. [2021-08-27 04:29:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:29:44,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:44,431 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 04:29:44,438 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 04:29:44,637 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 04:29:44,638 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1095317470, now seen corresponding path program 1 times [2021-08-27 04:29:44,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:44,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32469007] [2021-08-27 04:29:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:44,638 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:44,639 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 04:29:44,642 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 04:29:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:29:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:44,872 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 04:29:44,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:44,999 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 04:29:44,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:44,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32469007] [2021-08-27 04:29:45,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32469007] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 04:29:45,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:29:45,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-08-27 04:29:45,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255349502] [2021-08-27 04:29:45,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:29:45,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 04:29:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:29:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:29:45,001 INFO L87 Difference]: Start difference. First operand 249 states and 302 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 04:29:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:45,108 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2021-08-27 04:29:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:29:45,108 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 04:29:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:45,112 INFO L225 Difference]: With dead ends: 270 [2021-08-27 04:29:45,112 INFO L226 Difference]: Without dead ends: 270 [2021-08-27 04:29:45,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:29:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-27 04:29:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 253. [2021-08-27 04:29:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 139 states have (on average 1.5971223021582734) internal successors, (222), 198 states have internal predecessors, (222), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (43), 40 states have call predecessors, (43), 39 states have call successors, (43) [2021-08-27 04:29:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2021-08-27 04:29:45,126 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 21 [2021-08-27 04:29:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:45,126 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2021-08-27 04:29:45,126 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 04:29:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2021-08-27 04:29:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:29:45,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:45,129 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:45,139 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 04:29:45,337 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 04:29:45,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 60 more)] === [2021-08-27 04:29:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1209368675, now seen corresponding path program 1 times [2021-08-27 04:29:45,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 04:29:45,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85746835] [2021-08-27 04:29:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:45,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 04:29:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 04:29:45,339 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 04:29:45,340 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 04:29:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:29:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:45,550 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 04:29:45,554 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 04:29:45,787 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:29:45,787 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 26 treesize of output 28 [2021-08-27 04:29:45,796 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:29:45,796 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 25 treesize of output 25 [2021-08-27 04:29:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 04:29:45,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:29:52,411 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0) (bvule .cse0 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_6)))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from false [2021-08-27 04:29:53,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 04:29:53,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85746835] [2021-08-27 04:29:53,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:29:53,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [892225765] [2021-08-27 04:29:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:53,775 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-27 04:29:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-27 04:29:53,778 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 04:29:53,781 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 04:29:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:29:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:54,049 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 04:29:54,055 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 04:29:54,253 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:29:54,254 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 26 treesize of output 28 [2021-08-27 04:29:54,266 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:29:54,266 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 25 treesize of output 25 [2021-08-27 04:29:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 04:29:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:08,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:30:08,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162186713] [2021-08-27 04:30:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:30:08,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:30:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:30:08,560 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 04:30:08,561 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 04:30:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:30:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 04:30:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:30:08,837 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 04:30:10,995 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:30:10,995 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 12 treesize of output 14 [2021-08-27 04:30:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 04:30:11,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 04:30:24,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:30:24,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:30:24,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-27 04:30:24,283 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-27 04:30:24,284 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-27 04:30:24,286 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr3REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr0REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr1REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr2REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr3REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr4REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr5REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr9REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr10REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr11REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr12REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr13REQUIRES_VIOLATION [2021-08-27 04:30:24,288 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr14REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr15REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr16REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr17ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr18ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr19ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr20REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr21REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr22REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr23REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr0REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr1REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr2REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr3REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr4REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr5REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr0REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr1REQUIRES_VIOLATION [2021-08-27 04:30:24,289 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr2REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr4REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr5REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr0REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr1REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr2REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr3REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr4REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr5REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr6REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr7REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr0REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr1REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr2REQUIRES_VIOLATION [2021-08-27 04:30:24,290 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr3REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr0REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr1REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr2REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr3REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr4REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr5REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr6REQUIRES_VIOLATION [2021-08-27 04:30:24,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr7REQUIRES_VIOLATION [2021-08-27 04:30:24,296 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 04:30:24,499 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 04:30:24,716 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 04:30:24,892 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 04:30:24,896 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:30:24,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:30:24 BoogieIcfgContainer [2021-08-27 04:30:24,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:30:24,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:30:24,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:30:24,905 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:30:24,906 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:29:39" (3/4) ... [2021-08-27 04:30:24,908 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 04:30:24,908 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:30:24,909 INFO L168 Benchmark]: Toolchain (without parser) took 46300.58 ms. Allocated memory was 48.2 MB in the beginning and 125.8 MB in the end (delta: 77.6 MB). Free memory was 33.2 MB in the beginning and 86.5 MB in the end (delta: -53.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:24,909 INFO L168 Benchmark]: CDTParser took 1.73 ms. Allocated memory is still 48.2 MB. Free memory is still 30.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:30:24,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.62 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 33.1 MB in the beginning and 37.9 MB in the end (delta: -4.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:24,909 INFO L168 Benchmark]: Boogie Preprocessor took 70.25 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 35.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:24,910 INFO L168 Benchmark]: RCFGBuilder took 882.95 ms. Allocated memory is still 58.7 MB. Free memory was 35.2 MB in the beginning and 27.4 MB in the end (delta: 7.8 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:24,910 INFO L168 Benchmark]: TraceAbstraction took 45001.78 ms. Allocated memory was 58.7 MB in the beginning and 125.8 MB in the end (delta: 67.1 MB). Free memory was 26.7 MB in the beginning and 87.5 MB in the end (delta: -60.8 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:24,910 INFO L168 Benchmark]: Witness Printer took 3.02 ms. Allocated memory is still 125.8 MB. Free memory was 87.5 MB in the beginning and 86.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:30:24,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.73 ms. Allocated memory is still 48.2 MB. Free memory is still 30.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.62 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 33.1 MB in the beginning and 37.9 MB in the end (delta: -4.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.25 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 35.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 882.95 ms. Allocated memory is still 58.7 MB. Free memory was 35.2 MB in the beginning and 27.4 MB in the end (delta: 7.8 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45001.78 ms. Allocated memory was 58.7 MB in the beginning and 125.8 MB in the end (delta: 67.1 MB). Free memory was 26.7 MB in the beginning and 87.5 MB in the end (delta: -60.8 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.02 ms. Allocated memory is still 125.8 MB. Free memory was 87.5 MB in the beginning and 86.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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: [L110] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() - UnprovableResult [Line: 109]: 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: 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: 56]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 58]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 58]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 60]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 60]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 62]: 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: 65]: 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: 93]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 93]: 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: 104]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 104]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 104]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 104]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 105]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 105]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 105]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 106]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 106]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 106]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 82]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 82]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 82]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 82]: 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: 73]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 73]: 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: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 75]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 75]: 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, 208 locations, 64 error locations. Started 1 CEGAR loops. OverallTime: 44948.5ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 19.6ms, AutomataDifference: 2166.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1236 SDtfs, 655 SDslu, 3236 SDs, 0 SdLazy, 907 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1589.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 223.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=253occurred 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: 78.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.7ms SsaConstructionTime, 118.6ms SatisfiabilityAnalysisTime, 1268.3ms 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 04:30:24,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...