./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:09:34,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:09:34,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:09:34,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:09:34,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:09:34,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:09:34,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:09:34,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:09:34,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:09:34,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:09:34,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:09:34,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:09:34,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:09:34,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:09:34,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:09:34,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:09:34,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:09:34,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:09:34,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:09:34,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:09:34,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:09:34,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:09:34,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:09:34,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:09:34,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:09:34,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:09:34,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:09:34,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:09:34,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:09:34,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:09:34,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:09:34,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:09:34,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:09:34,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:09:34,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:09:34,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:09:34,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:09:34,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:09:34,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:09:34,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:09:34,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:09:34,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-30 16:09:34,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:09:34,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:09:34,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:09:34,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:09:34,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:09:34,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:09:34,605 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:09:34,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:09:34,605 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:09:34,606 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:09:34,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:09:34,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:09:34,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:09:34,606 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:09:34,607 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:09:34,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:09:34,607 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:09:34,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:09:34,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:09:34,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:09:34,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:09:34,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:09:34,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:09:34,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:09:34,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:09:34,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:09:34,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:09:34,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:09:34,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-08-30 16:09:34,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:09:34,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:09:34,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:09:34,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:09:34,836 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:09:34,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-30 16:09:34,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38b48e73/5f7660253b84437bb1b715b081a1bbb0/FLAG2a69d5a44 [2021-08-30 16:09:35,218 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:09:35,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-30 16:09:35,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38b48e73/5f7660253b84437bb1b715b081a1bbb0/FLAG2a69d5a44 [2021-08-30 16:09:35,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38b48e73/5f7660253b84437bb1b715b081a1bbb0 [2021-08-30 16:09:35,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:09:35,650 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:09:35,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:09:35,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:09:35,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:09:35,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:09:35" (1/1) ... [2021-08-30 16:09:35,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6524bd42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:35, skipping insertion in model container [2021-08-30 16:09:35,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:09:35" (1/1) ... [2021-08-30 16:09:35,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:09:35,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:09:35,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-30 16:09:35,753 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:35,754 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:35,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:09:35,774 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) [2021-08-30 16:09:35,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d24e66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:35, skipping insertion in model container [2021-08-30 16:09:35,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:09:35,775 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-08-30 16:09:35,776 INFO L158 Benchmark]: Toolchain (without parser) took 125.55ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 30.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 16:09:35,777 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 60.8MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:09:35,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 123.91ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 30.9MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 16:09:35,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 60.8MB. Free memory is still 42.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 123.91ms. Allocated memory is still 60.8MB. Free memory was 40.0MB in the beginning and 30.9MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * 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-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:09:37,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:09:37,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:09:37,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:09:37,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:09:37,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:09:37,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:09:37,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:09:37,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:09:37,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:09:37,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:09:37,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:09:37,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:09:37,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:09:37,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:09:37,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:09:37,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:09:37,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:09:37,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:09:37,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:09:37,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:09:37,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:09:37,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:09:37,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:09:37,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:09:37,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:09:37,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:09:37,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:09:37,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:09:37,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:09:37,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:09:37,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:09:37,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:09:37,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:09:37,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:09:37,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:09:37,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:09:37,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:09:37,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:09:37,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:09:37,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:09:37,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-08-30 16:09:37,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:09:37,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:09:37,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:09:37,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:09:37,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:09:37,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:09:37,418 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:09:37,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:09:37,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:09:37,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:09:37,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:09:37,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:09:37,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:09:37,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:09:37,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:09:37,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-30 16:09:37,421 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-08-30 16:09:37,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:09:37,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:09:37,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:09:37,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:09:37,751 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:09:37,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-30 16:09:37,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd18cf4ac/438426e3aa8f4e97b88fa8c17612df20/FLAGfed52c038 [2021-08-30 16:09:38,214 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:09:38,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-08-30 16:09:38,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd18cf4ac/438426e3aa8f4e97b88fa8c17612df20/FLAGfed52c038 [2021-08-30 16:09:38,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd18cf4ac/438426e3aa8f4e97b88fa8c17612df20 [2021-08-30 16:09:38,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:09:38,237 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:09:38,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:09:38,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:09:38,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:09:38,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea462ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38, skipping insertion in model container [2021-08-30 16:09:38,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:09:38,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:09:38,351 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-30 16:09:38,366 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:38,368 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:38,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:09:38,410 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-08-30 16:09:38,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:09:38,424 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-30 16:09:38,436 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:38,437 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:38,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:09:38,460 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:09:38,471 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-08-30 16:09:38,474 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:38,475 WARN L1507 CHandler]: Possible shadowing of function min [2021-08-30 16:09:38,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:09:38,517 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:09:38,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38 WrapperNode [2021-08-30 16:09:38,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:09:38,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:09:38,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:09:38,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:09:38,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:09:38,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:09:38,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:09:38,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:09:38,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (1/1) ... [2021-08-30 16:09:38,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:09:38,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:09:38,607 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) [2021-08-30 16:09:38,617 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 [2021-08-30 16:09:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:09:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:09:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-08-30 16:09:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 16:09:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-30 16:09:38,635 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:09:38,636 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-08-30 16:09:38,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-08-30 16:09:38,637 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-30 16:09:38,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-30 16:09:39,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:09:39,005 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 16:09:39,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:09:39 BoogieIcfgContainer [2021-08-30 16:09:39,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:09:39,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:09:39,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:09:39,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:09:39,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:09:38" (1/3) ... [2021-08-30 16:09:39,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0d52e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:09:39, skipping insertion in model container [2021-08-30 16:09:39,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:09:38" (2/3) ... [2021-08-30 16:09:39,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0d52e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:09:39, skipping insertion in model container [2021-08-30 16:09:39,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:09:39" (3/3) ... [2021-08-30 16:09:39,011 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-08-30 16:09:39,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:09:39,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-08-30 16:09:39,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:09:39,055 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 [2021-08-30 16:09:39,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-08-30 16:09:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 92 states have (on average 1.7391304347826086) internal successors, (160), 147 states have internal predecessors, (160), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-08-30 16:09:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 16:09:39,088 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:39,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:39,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-08-30 16:09:39,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:39,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169879304] [2021-08-30 16:09:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:39,101 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:39,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:39,141 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) [2021-08-30 16:09:39,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-30 16:09:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:39,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 16:09:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:39,358 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 [2021-08-30 16:09:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:39,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:39,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:39,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169879304] [2021-08-30 16:09:39,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169879304] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 16:09:39,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:09:39,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 16:09:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282847118] [2021-08-30 16:09:39,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 16:09:39,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 16:09:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 16:09:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 16:09:39,434 INFO L87 Difference]: Start difference. First operand has 185 states, 92 states have (on average 1.7391304347826086) internal successors, (160), 147 states have internal predecessors, (160), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:09:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:09:39,767 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-08-30 16:09:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 16:09:39,770 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 [2021-08-30 16:09:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:09:39,790 INFO L225 Difference]: With dead ends: 186 [2021-08-30 16:09:39,790 INFO L226 Difference]: Without dead ends: 182 [2021-08-30 16:09:39,791 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.07ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 16:09:39,794 INFO L928 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.28ms IncrementalHoareTripleChecker+Time [2021-08-30 16:09:39,794 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 312 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 304.28ms Time] [2021-08-30 16:09:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-30 16:09:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-08-30 16:09:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 143 states have internal predecessors, (151), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-08-30 16:09:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-08-30 16:09:39,826 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-08-30 16:09:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:09:39,826 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-08-30 16:09:39,826 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) [2021-08-30 16:09:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-08-30 16:09:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 16:09:39,827 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:39,827 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:39,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-30 16:09:40,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 16:09:40,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-08-30 16:09:40,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:40,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859715636] [2021-08-30 16:09:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:40,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:40,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:40,040 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) [2021-08-30 16:09:40,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-30 16:09:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:40,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 16:09:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:40,152 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 [2021-08-30 16:09:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:40,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:40,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:40,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859715636] [2021-08-30 16:09:40,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859715636] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 16:09:40,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:09:40,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-30 16:09:40,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343189264] [2021-08-30 16:09:40,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:09:40,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 16:09:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:09:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:09:40,212 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:09:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:09:40,821 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-08-30 16:09:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 16:09:40,822 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 [2021-08-30 16:09:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:09:40,823 INFO L225 Difference]: With dead ends: 179 [2021-08-30 16:09:40,823 INFO L226 Difference]: Without dead ends: 179 [2021-08-30 16:09:40,823 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.20ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:09:40,824 INFO L928 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 503.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 591.98ms IncrementalHoareTripleChecker+Time [2021-08-30 16:09:40,824 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 149 Invalid, 448 Unknown, 0 Unchecked, 3.42ms Time], IncrementalHoareTripleChecker [0 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 591.98ms Time] [2021-08-30 16:09:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-30 16:09:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-08-30 16:09:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 142 states have internal predecessors, (150), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-08-30 16:09:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-08-30 16:09:40,833 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-08-30 16:09:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:09:40,833 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-08-30 16:09:40,833 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) [2021-08-30 16:09:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-08-30 16:09:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:09:40,834 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:40,834 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:40,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-08-30 16:09:41,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 16:09:41,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-08-30 16:09:41,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:41,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851097179] [2021-08-30 16:09:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:41,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:41,037 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) [2021-08-30 16:09:41,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-30 16:09:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 16:09:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:41,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:41,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:41,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851097179] [2021-08-30 16:09:41,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851097179] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 16:09:41,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:09:41,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-08-30 16:09:41,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313297112] [2021-08-30 16:09:41,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:09:41,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 16:09:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:09:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:09:41,244 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 16:09:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:09:42,032 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-08-30 16:09:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:09:42,032 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 [2021-08-30 16:09:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:09:42,034 INFO L225 Difference]: With dead ends: 244 [2021-08-30 16:09:42,034 INFO L226 Difference]: Without dead ends: 244 [2021-08-30 16:09:42,034 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.23ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:09:42,035 INFO L928 BasicCegarLoop]: 63 mSDtfsCounter, 89 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 620.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.89ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 743.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:09:42,035 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 413 Invalid, 1090 Unknown, 0 Unchecked, 6.89ms Time], IncrementalHoareTripleChecker [27 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 743.55ms Time] [2021-08-30 16:09:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-30 16:09:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-08-30 16:09:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 121 states have (on average 1.6198347107438016) internal successors, (196), 174 states have internal predecessors, (196), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-08-30 16:09:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-08-30 16:09:42,047 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-08-30 16:09:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:09:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-08-30 16:09:42,047 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) [2021-08-30 16:09:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-08-30 16:09:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:09:42,048 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:42,048 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:42,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-30 16:09:42,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 16:09:42,255 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-08-30 16:09:42,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:42,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731425729] [2021-08-30 16:09:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:42,257 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:42,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:42,258 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) [2021-08-30 16:09:42,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-30 16:09:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 16:09:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:42,328 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 [2021-08-30 16:09:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:42,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:42,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:42,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731425729] [2021-08-30 16:09:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731425729] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 16:09:42,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:09:42,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-30 16:09:42,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835035732] [2021-08-30 16:09:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:09:42,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 16:09:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:09:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:09:42,424 INFO L87 Difference]: Start difference. First operand 227 states and 278 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 16:09:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:09:42,836 INFO L93 Difference]: Finished difference Result 231 states and 282 transitions. [2021-08-30 16:09:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:09:42,837 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 [2021-08-30 16:09:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:09:42,838 INFO L225 Difference]: With dead ends: 231 [2021-08-30 16:09:42,838 INFO L226 Difference]: Without dead ends: 231 [2021-08-30 16:09:42,838 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.42ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:09:42,839 INFO L928 BasicCegarLoop]: 45 mSDtfsCounter, 93 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 336.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.93ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 397.90ms IncrementalHoareTripleChecker+Time [2021-08-30 16:09:42,839 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 70 Invalid, 535 Unknown, 0 Unchecked, 2.93ms Time], IncrementalHoareTripleChecker [31 Valid, 419 Invalid, 0 Unknown, 85 Unchecked, 397.90ms Time] [2021-08-30 16:09:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-30 16:09:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-08-30 16:09:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 123 states have (on average 1.6260162601626016) internal successors, (200), 174 states have internal predecessors, (200), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 41 states have call predecessors, (42), 39 states have call successors, (42) [2021-08-30 16:09:42,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-08-30 16:09:42,848 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-08-30 16:09:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:09:42,848 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-08-30 16:09:42,848 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) [2021-08-30 16:09:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-08-30 16:09:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:09:42,849 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:42,849 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:42,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:09:43,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 16:09:43,056 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-08-30 16:09:43,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:43,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13844136] [2021-08-30 16:09:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:43,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:43,059 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) [2021-08-30 16:09:43,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-30 16:09:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 16:09:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:43,117 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 [2021-08-30 16:09:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:43,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:43,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:43,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13844136] [2021-08-30 16:09:43,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13844136] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 16:09:43,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:09:43,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-30 16:09:43,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710518003] [2021-08-30 16:09:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:09:43,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 16:09:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:09:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:09:43,306 INFO L87 Difference]: Start difference. First operand 229 states and 282 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) [2021-08-30 16:09:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:09:44,122 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2021-08-30 16:09:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:09:44,123 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 [2021-08-30 16:09:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:09:44,131 INFO L225 Difference]: With dead ends: 239 [2021-08-30 16:09:44,131 INFO L226 Difference]: Without dead ends: 239 [2021-08-30 16:09:44,131 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.93ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:09:44,132 INFO L928 BasicCegarLoop]: 46 mSDtfsCounter, 102 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 692.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 797.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:09:44,132 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 84 Invalid, 738 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [32 Valid, 616 Invalid, 0 Unknown, 90 Unchecked, 797.76ms Time] [2021-08-30 16:09:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-30 16:09:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2021-08-30 16:09:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 125 states have (on average 1.608) internal successors, (201), 176 states have internal predecessors, (201), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (44), 42 states have call predecessors, (44), 40 states have call successors, (44) [2021-08-30 16:09:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 286 transitions. [2021-08-30 16:09:44,144 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 286 transitions. Word has length 14 [2021-08-30 16:09:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:09:44,147 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 286 transitions. [2021-08-30 16:09:44,147 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) [2021-08-30 16:09:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 286 transitions. [2021-08-30 16:09:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:09:44,149 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:44,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:44,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-30 16:09:44,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 16:09:44,355 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-08-30 16:09:44,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:44,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636499176] [2021-08-30 16:09:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:44,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:44,359 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) [2021-08-30 16:09:44,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-30 16:09:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 16:09:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:44,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:09:44,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:44,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636499176] [2021-08-30 16:09:44,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636499176] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 16:09:44,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:09:44,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-08-30 16:09:44,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970191640] [2021-08-30 16:09:44,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:09:44,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 16:09:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:09:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:09:44,601 INFO L87 Difference]: Start difference. First operand 232 states and 286 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) [2021-08-30 16:09:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:09:45,405 INFO L93 Difference]: Finished difference Result 253 states and 295 transitions. [2021-08-30 16:09:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:09:45,406 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 [2021-08-30 16:09:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:09:45,408 INFO L225 Difference]: With dead ends: 253 [2021-08-30 16:09:45,408 INFO L226 Difference]: Without dead ends: 253 [2021-08-30 16:09:45,408 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.47ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:09:45,409 INFO L928 BasicCegarLoop]: 62 mSDtfsCounter, 88 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 650.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.35ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 765.94ms IncrementalHoareTripleChecker+Time [2021-08-30 16:09:45,409 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 407 Invalid, 1096 Unknown, 0 Unchecked, 5.35ms Time], IncrementalHoareTripleChecker [27 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 765.94ms Time] [2021-08-30 16:09:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-30 16:09:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2021-08-30 16:09:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 128 states have (on average 1.59375) internal successors, (204), 179 states have internal predecessors, (204), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (44), 42 states have call predecessors, (44), 40 states have call successors, (44) [2021-08-30 16:09:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 289 transitions. [2021-08-30 16:09:45,419 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 289 transitions. Word has length 21 [2021-08-30 16:09:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:09:45,419 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 289 transitions. [2021-08-30 16:09:45,419 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) [2021-08-30 16:09:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 289 transitions. [2021-08-30 16:09:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-30 16:09:45,420 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:09:45,421 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:09:45,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:09:45,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 16:09:45,629 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-08-30 16:09:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:09:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1907346071, now seen corresponding path program 1 times [2021-08-30 16:09:45,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 16:09:45,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349339795] [2021-08-30 16:09:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:45,632 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 16:09:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 16:09:45,633 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) [2021-08-30 16:09:45,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-30 16:09:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:45,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 16:09:45,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:45,770 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 [2021-08-30 16:09:45,892 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 16:09:45,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-08-30 16:09:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:09:45,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:09:54,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 16:09:54,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349339795] [2021-08-30 16:09:54,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 16:09:54,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [189179182] [2021-08-30 16:09:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:09:54,248 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-30 16:09:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-30 16:09:54,250 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) [2021-08-30 16:09:54,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-08-30 16:09:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:09:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 16:09:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:09:54,497 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 [2021-08-30 16:09:58,680 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 16:09:58,680 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 15 treesize of output 20 [2021-08-30 16:09:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:09:58,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:10:00,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 16:10:00,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428871532] [2021-08-30 16:10:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:10:00,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:10:00,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:10:00,819 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) [2021-08-30 16:10:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 16:10:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:10:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 16:10:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:10:01,108 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 16:10:01,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-08-30 16:10:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:10:01,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:10:09,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 16:10:09,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:10:09,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-30 16:10:09,431 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-30 16:10:09,431 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-08-30 16:10:09,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr2REQUIRES_VIOLATION (54 of 55 remaining) [2021-08-30 16:10:09,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK (53 of 55 remaining) [2021-08-30 16:10:09,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr0REQUIRES_VIOLATION (52 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr1REQUIRES_VIOLATION (51 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr2REQUIRES_VIOLATION (50 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr3REQUIRES_VIOLATION (49 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr4REQUIRES_VIOLATION (48 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr5REQUIRES_VIOLATION (47 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr6REQUIRES_VIOLATION (46 of 55 remaining) [2021-08-30 16:10:09,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr7REQUIRES_VIOLATION (45 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE (44 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE (43 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE (42 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr11REQUIRES_VIOLATION (41 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr12REQUIRES_VIOLATION (40 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr13REQUIRES_VIOLATION (39 of 55 remaining) [2021-08-30 16:10:09,438 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr14REQUIRES_VIOLATION (38 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr0REQUIRES_VIOLATION (37 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr1REQUIRES_VIOLATION (36 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr2REQUIRES_VIOLATION (35 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr3REQUIRES_VIOLATION (34 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr4REQUIRES_VIOLATION (33 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr5REQUIRES_VIOLATION (32 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr0REQUIRES_VIOLATION (31 of 55 remaining) [2021-08-30 16:10:09,439 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr1REQUIRES_VIOLATION (30 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr3REQUIRES_VIOLATION (29 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr4REQUIRES_VIOLATION (28 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr5REQUIRES_VIOLATION (27 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr0REQUIRES_VIOLATION (26 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr1REQUIRES_VIOLATION (25 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr2REQUIRES_VIOLATION (24 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr3REQUIRES_VIOLATION (23 of 55 remaining) [2021-08-30 16:10:09,440 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr4REQUIRES_VIOLATION (22 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr5REQUIRES_VIOLATION (21 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr6REQUIRES_VIOLATION (20 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr7REQUIRES_VIOLATION (19 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr8ASSERT_VIOLATIONMEMORY_FREE (18 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr9ASSERT_VIOLATIONMEMORY_FREE (17 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr10ASSERT_VIOLATIONMEMORY_FREE (16 of 55 remaining) [2021-08-30 16:10:09,441 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr11ASSERT_VIOLATIONMEMORY_FREE (15 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr12ASSERT_VIOLATIONMEMORY_FREE (14 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr13ASSERT_VIOLATIONMEMORY_FREE (13 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr0REQUIRES_VIOLATION (12 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr1REQUIRES_VIOLATION (11 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr2REQUIRES_VIOLATION (10 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr3REQUIRES_VIOLATION (9 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (8 of 55 remaining) [2021-08-30 16:10:09,442 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr0REQUIRES_VIOLATION (7 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr1REQUIRES_VIOLATION (6 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr2REQUIRES_VIOLATION (5 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr3REQUIRES_VIOLATION (4 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr4REQUIRES_VIOLATION (3 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr5REQUIRES_VIOLATION (2 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr6REQUIRES_VIOLATION (1 of 55 remaining) [2021-08-30 16:10:09,443 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr7REQUIRES_VIOLATION (0 of 55 remaining) [2021-08-30 16:10:09,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-08-30 16:10:09,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-08-30 16:10:09,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 16:10:10,054 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 [2021-08-30 16:10:10,060 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:10:10,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:10:10 BoogieIcfgContainer [2021-08-30 16:10:10,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:10:10,109 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:10:10,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:10:10,110 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:10:10,110 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:09:39" (3/4) ... [2021-08-30 16:10:10,112 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 16:10:10,112 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:10:10,113 INFO L158 Benchmark]: Toolchain (without parser) took 31876.39ms. Allocated memory was 56.6MB in the beginning and 119.5MB in the end (delta: 62.9MB). Free memory was 33.4MB in the beginning and 83.0MB in the end (delta: -49.6MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2021-08-30 16:10:10,113 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 56.6MB. Free memory was 37.9MB in the beginning and 37.9MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:10:10,113 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.24ms. Allocated memory was 56.6MB in the beginning and 81.8MB in the end (delta: 25.2MB). Free memory was 33.2MB in the beginning and 63.7MB in the end (delta: -30.5MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2021-08-30 16:10:10,114 INFO L158 Benchmark]: Boogie Preprocessor took 61.89ms. Allocated memory is still 81.8MB. Free memory was 63.7MB in the beginning and 61.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:10:10,114 INFO L158 Benchmark]: RCFGBuilder took 425.34ms. Allocated memory is still 81.8MB. Free memory was 61.3MB in the beginning and 40.0MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-08-30 16:10:10,114 INFO L158 Benchmark]: TraceAbstraction took 31101.16ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 39.7MB in the beginning and 83.3MB in the end (delta: -43.6MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. [2021-08-30 16:10:10,115 INFO L158 Benchmark]: Witness Printer took 3.01ms. Allocated memory is still 119.5MB. Free memory was 83.3MB in the beginning and 83.0MB in the end (delta: 295.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:10:10,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 56.6MB. Free memory was 37.9MB in the beginning and 37.9MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.24ms. Allocated memory was 56.6MB in the beginning and 81.8MB in the end (delta: 25.2MB). Free memory was 33.2MB in the beginning and 63.7MB in the end (delta: -30.5MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.89ms. Allocated memory is still 81.8MB. Free memory was 63.7MB in the beginning and 61.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 425.34ms. Allocated memory is still 81.8MB. Free memory was 61.3MB in the beginning and 40.0MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 31101.16ms. Allocated memory was 81.8MB in the beginning and 119.5MB in the end (delta: 37.7MB). Free memory was 39.7MB in the beginning and 83.3MB in the end (delta: -43.6MB). Peak memory consumption was 40.1MB. Max. memory is 16.1GB. * Witness Printer took 3.01ms. Allocated memory is still 119.5MB. Free memory was 83.3MB in the beginning and 83.0MB in the end (delta: 295.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() - UnprovableResult [Line: 101]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 52]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 52]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 42]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 42]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 67]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 67]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 188 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 31010.26ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 26.29ms, AutomataDifference: 3835.03ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.67ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 397 SdHoareTripleChecker+Valid, 3601.42ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 380 mSDsluCounter, 1226 SdHoareTripleChecker+Invalid, 3053.21ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 175 IncrementalHoareTripleChecker+Unchecked, 3208 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3925 IncrementalHoareTripleChecker+Invalid, 4219 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 322 mSDtfsCounter, 3925 mSolverCounterSat, 26.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 171.31ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=6, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 71.42ms AutomataMinimizationTime, 6 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.17ms SsaConstructionTime, 102.58ms SatisfiabilityAnalysisTime, 888.75ms 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 [2021-08-30 16:10:10,185 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...