./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg --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 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg --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 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:23:19,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:23:19,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:23:19,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:23:19,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:23:19,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:23:19,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:23:19,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:23:19,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:23:19,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:23:19,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:23:19,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:23:19,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:23:19,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:23:19,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:23:19,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:23:19,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:23:19,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:23:19,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:23:19,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:23:19,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:23:19,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:23:19,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:23:19,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:23:19,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:23:19,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:23:19,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:23:19,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:23:19,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:23:19,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:23:19,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:23:19,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:23:19,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:23:19,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:23:19,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:23:19,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:23:19,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:23:19,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:23:19,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:23:19,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:23:19,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:23:19,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 09:23:19,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:23:19,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:23:19,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:23:19,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:23:19,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:23:19,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:23:19,752 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:23:19,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:23:19,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:23:19,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:23:19,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:23:19,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:23:19,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:23:19,754 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:23:19,755 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:23:19,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:23:19,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:23:19,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:23:19,756 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:23:19,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:23:19,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:23:19,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:23:19,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:19,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:23:19,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:23:19,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:23:19,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:23:19,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:23:19,758 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-28 09:23:20,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:23:20,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:23:20,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:23:20,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:23:20,110 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:23:20,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 09:23:20,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/77d6a845b/4ffc140176bf421ba08bad8cbb435e52/FLAGdce9af9b5 [2021-10-28 09:23:20,687 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:23:20,688 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 09:23:20,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/77d6a845b/4ffc140176bf421ba08bad8cbb435e52/FLAGdce9af9b5 [2021-10-28 09:23:21,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/77d6a845b/4ffc140176bf421ba08bad8cbb435e52 [2021-10-28 09:23:21,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:23:21,028 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:23:21,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:21,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:23:21,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:23:21,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:21" (1/1) ... [2021-10-28 09:23:21,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367fafbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:21, skipping insertion in model container [2021-10-28 09:23:21,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:21" (1/1) ... [2021-10-28 09:23:21,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:23:21,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:23:21,268 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 09:23:21,288 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:21,291 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:21,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:21,339 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) [2021-10-28 09:23:21,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b3a6cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:21, skipping insertion in model container [2021-10-28 09:23:21,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:21,344 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-28 09:23:21,347 INFO L168 Benchmark]: Toolchain (without parser) took 317.30 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 64.7 MB in the beginning and 119.1 MB in the end (delta: -54.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:21,349 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:21,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.11 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 64.5 MB in the beginning and 119.1 MB in the end (delta: -54.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:21,354 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.11 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 64.5 MB in the beginning and 119.1 MB in the end (delta: -54.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:23:23,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:23:23,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:23:23,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:23:23,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:23:23,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:23:23,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:23:23,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:23:23,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:23:23,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:23:23,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:23:23,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:23:23,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:23:23,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:23:23,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:23:23,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:23:23,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:23:23,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:23:23,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:23:23,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:23:23,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:23:23,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:23:23,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:23:23,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:23:23,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:23:23,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:23:23,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:23:23,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:23:23,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:23:23,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:23:23,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:23:23,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:23:23,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:23:23,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:23:23,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:23:23,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:23:23,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:23:23,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:23:23,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:23:23,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:23:23,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:23:23,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-10-28 09:23:23,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:23:23,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:23:23,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:23:23,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:23:23,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:23:23,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:23:23,690 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:23:23,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:23:23,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:23:23,692 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:23:23,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:23:23,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:23:23,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:23:23,694 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:23:23,694 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:23:23,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:23:23,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:23:23,695 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 09:23:23,695 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 09:23:23,695 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:23:23,696 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:23:23,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:23:23,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:23:23,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:23:23,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:23,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:23:23,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:23:23,698 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 09:23:23,698 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 09:23:23,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:23:23,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 09:23:23,699 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-28 09:23:24,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:23:24,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:23:24,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:23:24,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:23:24,128 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:23:24,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 09:23:24,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/cec2d72db/5819690a3028408bb0192f788b61f1cb/FLAG74ad846f0 [2021-10-28 09:23:24,818 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:23:24,821 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 09:23:24,829 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/cec2d72db/5819690a3028408bb0192f788b61f1cb/FLAG74ad846f0 [2021-10-28 09:23:25,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/data/cec2d72db/5819690a3028408bb0192f788b61f1cb [2021-10-28 09:23:25,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:23:25,181 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:23:25,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:25,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:23:25,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:23:25,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ff893c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25, skipping insertion in model container [2021-10-28 09:23:25,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:23:25,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:23:25,346 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 09:23:25,360 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:25,363 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:25,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:25,413 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-28 09:23:25,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:23:25,448 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 09:23:25,454 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:25,456 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:25,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:25,474 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:23:25,499 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 09:23:25,505 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:25,506 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 09:23:25,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:23:25,536 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:23:25,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25 WrapperNode [2021-10-28 09:23:25,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:23:25,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:23:25,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:23:25,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:23:25,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:23:25,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:23:25,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:23:25,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:23:25,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (1/1) ... [2021-10-28 09:23:25,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:23:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:25,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:23:25,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:23:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:23:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:23:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-10-28 09:23:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:23:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-28 09:23:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-28 09:23:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-28 09:23:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-28 09:23:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-28 09:23:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-28 09:23:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-10-28 09:23:25,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:23:25,705 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-28 09:23:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:23:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:23:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:23:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:23:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-10-28 09:23:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-10-28 09:23:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:23:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:23:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:23:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:23:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-28 09:23:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-28 09:23:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:23:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 09:23:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:23:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-28 09:23:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 09:23:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:23:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-28 09:23:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:23:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-28 09:23:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-28 09:23:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-10-28 09:23:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-28 09:23:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:23:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:23:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 09:23:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:23:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 09:23:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 09:23:26,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:23:26,683 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 09:23:26,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:26 BoogieIcfgContainer [2021-10-28 09:23:26,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:23:26,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:23:26,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:23:26,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:23:26,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:23:25" (1/3) ... [2021-10-28 09:23:26,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bedad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:26, skipping insertion in model container [2021-10-28 09:23:26,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:23:25" (2/3) ... [2021-10-28 09:23:26,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bedad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:23:26, skipping insertion in model container [2021-10-28 09:23:26,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:26" (3/3) ... [2021-10-28 09:23:26,697 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-28 09:23:26,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:23:26,703 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-28 09:23:26,760 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:23:26,772 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, mAutomataTypeConcurrency=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 [2021-10-28 09:23:26,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-28 09:23:26,792 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) [2021-10-28 09:23:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:23:26,812 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:26,813 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:26,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-10-28 09:23:26,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:26,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109257137] [2021-10-28 09:23:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:26,832 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:26,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:26,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 09:23:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:23:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:27,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:23:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:27,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:27,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:27,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109257137] [2021-10-28 09:23:27,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109257137] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:27,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:27,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 09:23:27,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432917951] [2021-10-28 09:23:27,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:23:27,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:23:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:23:27,151 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) [2021-10-28 09:23:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:27,467 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-10-28 09:23:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:23:27,468 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 [2021-10-28 09:23:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:27,480 INFO L225 Difference]: With dead ends: 186 [2021-10-28 09:23:27,480 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 09:23:27,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:23:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 09:23:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-10-28 09:23:27,530 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) [2021-10-28 09:23:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-10-28 09:23:27,537 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-10-28 09:23:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:27,538 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-10-28 09:23:27,538 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) [2021-10-28 09:23:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-10-28 09:23:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:23:27,539 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:27,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:27,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:27,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:27,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-10-28 09:23:27,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:27,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079243447] [2021-10-28 09:23:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:27,745 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:27,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:27,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:27,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 09:23:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:23:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:27,861 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 [2021-10-28 09:23:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:27,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:27,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:27,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079243447] [2021-10-28 09:23:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079243447] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:27,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:27,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 09:23:27,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63982279] [2021-10-28 09:23:27,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:23:27,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:27,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:23:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:27,964 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) [2021-10-28 09:23:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:28,527 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-10-28 09:23:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:23:28,528 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 [2021-10-28 09:23:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:28,530 INFO L225 Difference]: With dead ends: 179 [2021-10-28 09:23:28,530 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 09:23:28,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:23:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 09:23:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-10-28 09:23:28,546 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) [2021-10-28 09:23:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-10-28 09:23:28,549 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-10-28 09:23:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:28,550 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-10-28 09:23:28,550 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) [2021-10-28 09:23:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-10-28 09:23:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:23:28,551 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:28,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:28,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-28 09:23:28,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:28,760 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-10-28 09:23:28,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:28,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482191601] [2021-10-28 09:23:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:28,761 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:28,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:28,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 09:23:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:23:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:29,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:29,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:29,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482191601] [2021-10-28 09:23:29,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482191601] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:29,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:29,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-28 09:23:29,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431412250] [2021-10-28 09:23:29,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:23:29,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:23:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:23:29,230 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) [2021-10-28 09:23:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:29,430 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-10-28 09:23:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:23:29,430 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 [2021-10-28 09:23:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:29,434 INFO L225 Difference]: With dead ends: 244 [2021-10-28 09:23:29,434 INFO L226 Difference]: Without dead ends: 244 [2021-10-28 09:23:29,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:23:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-28 09:23:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-10-28 09:23:29,465 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) [2021-10-28 09:23:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-10-28 09:23:29,469 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-10-28 09:23:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:29,470 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-10-28 09:23:29,470 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) [2021-10-28 09:23:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-10-28 09:23:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:23:29,471 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:29,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:29,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:29,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:29,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-10-28 09:23:29,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:29,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927218196] [2021-10-28 09:23:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:29,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:29,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:29,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:29,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 09:23:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:29,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:23:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:29,808 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 [2021-10-28 09:23:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:29,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:29,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:29,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927218196] [2021-10-28 09:23:29,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927218196] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:29,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:29,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 09:23:29,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615250152] [2021-10-28 09:23:29,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:23:29,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:23:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:23:29,954 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) [2021-10-28 09:23:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:30,625 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-10-28 09:23:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:23:30,632 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 [2021-10-28 09:23:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:30,634 INFO L225 Difference]: With dead ends: 225 [2021-10-28 09:23:30,635 INFO L226 Difference]: Without dead ends: 225 [2021-10-28 09:23:30,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:23:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-28 09:23:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-10-28 09:23:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 121 states have (on average 1.603305785123967) internal successors, (194), 172 states have internal predecessors, (194), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-10-28 09:23:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2021-10-28 09:23:30,666 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 14 [2021-10-28 09:23:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:30,666 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2021-10-28 09:23:30,667 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) [2021-10-28 09:23:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2021-10-28 09:23:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:23:30,668 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:30,668 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:30,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:30,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:30,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-10-28 09:23:30,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:30,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202883425] [2021-10-28 09:23:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:30,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:30,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:30,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 09:23:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:23:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:31,030 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 [2021-10-28 09:23:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:31,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:31,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:31,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202883425] [2021-10-28 09:23:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202883425] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:31,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:31,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 09:23:31,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371705732] [2021-10-28 09:23:31,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:23:31,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:23:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:23:31,427 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:23:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:32,695 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2021-10-28 09:23:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:23:32,696 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 [2021-10-28 09:23:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:32,698 INFO L225 Difference]: With dead ends: 237 [2021-10-28 09:23:32,698 INFO L226 Difference]: Without dead ends: 237 [2021-10-28 09:23:32,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:23:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-28 09:23:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-10-28 09:23:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 124 states have (on average 1.5887096774193548) internal successors, (197), 174 states have internal predecessors, (197), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-10-28 09:23:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-10-28 09:23:32,715 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-10-28 09:23:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:32,715 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-10-28 09:23:32,716 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) [2021-10-28 09:23:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-10-28 09:23:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:23:32,717 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:32,717 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] [2021-10-28 09:23:32,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:32,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:32,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-10-28 09:23:32,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:32,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017244892] [2021-10-28 09:23:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:32,930 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:32,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:32,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 09:23:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:23:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:33,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:23:33,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017244892] [2021-10-28 09:23:33,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017244892] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:23:33,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:23:33,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-28 09:23:33,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891286477] [2021-10-28 09:23:33,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:23:33,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:23:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:23:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:23:33,346 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:23:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:33,503 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2021-10-28 09:23:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:23:33,505 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 [2021-10-28 09:23:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:33,507 INFO L225 Difference]: With dead ends: 250 [2021-10-28 09:23:33,507 INFO L226 Difference]: Without dead ends: 250 [2021-10-28 09:23:33,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:23:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-28 09:23:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-10-28 09:23:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 127 states have (on average 1.5748031496062993) internal successors, (200), 177 states have internal predecessors, (200), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-10-28 09:23:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-10-28 09:23:33,525 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 21 [2021-10-28 09:23:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:33,526 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-10-28 09:23:33,526 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) [2021-10-28 09:23:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-10-28 09:23:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:23:33,530 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:33,530 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] [2021-10-28 09:23:33,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-28 09:23:33,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:23:33,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:23:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1907346070, now seen corresponding path program 1 times [2021-10-28 09:23:33,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:23:33,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5859012] [2021-10-28 09:23:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:33,745 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:23:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:23:33,745 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:23:33,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 09:23:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:23:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:34,025 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 [2021-10-28 09:23:34,030 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 [2021-10-28 09:23:34,340 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:23:34,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-28 09:23:34,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:34,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 09:23:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:23:34,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:23:53,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:23:53,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 128 [2021-10-28 09:23:53,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:23:53,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 132 [2021-10-28 09:24:06,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:24:06,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 122 [2021-10-28 09:24:06,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:24:06,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 126 [2021-10-28 09:24:26,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20)))))) (_ bv0 1))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from false [2021-10-28 09:24:28,113 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20)))))) (_ bv0 1))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from true [2021-10-28 09:24:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 5 refuted. 3 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:24:28,241 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:24:28,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5859012] [2021-10-28 09:24:28,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5859012] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 09:24:28,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:28,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-28 09:24:28,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195818995] [2021-10-28 09:24:28,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:24:28,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:24:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:24:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=60, Unknown=9, NotChecked=16, Total=110 [2021-10-28 09:24:28,244 INFO L87 Difference]: Start difference. First operand 233 states and 285 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 09:27:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:39,389 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-10-28 09:27:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:27:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2021-10-28 09:27:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:27:39,391 INFO L225 Difference]: With dead ends: 145 [2021-10-28 09:27:39,391 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 09:27:39,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=32, Invalid=73, Unknown=9, NotChecked=18, Total=132 [2021-10-28 09:27:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 09:27:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-28 09:27:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 111 states have internal predecessors, (114), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-10-28 09:27:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-10-28 09:27:39,402 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 38 [2021-10-28 09:27:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:27:39,402 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-10-28 09:27:39,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 09:27:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-10-28 09:27:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:27:39,403 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:27:39,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:27:39,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:27:39,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting tree_inorderErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 09:27:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:27:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2132967547, now seen corresponding path program 1 times [2021-10-28 09:27:39,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 09:27:39,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568231304] [2021-10-28 09:27:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:27:39,617 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 09:27:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 09:27:39,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 09:27:39,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 09:27:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:27:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:27:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:27:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 09:27:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:27:40,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 09:27:40,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568231304] [2021-10-28 09:27:40,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568231304] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 09:27:40,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:27:40,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-28 09:27:40,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379125684] [2021-10-28 09:27:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:27:40,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 09:27:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:27:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:27:40,130 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:27:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:27:40,154 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2021-10-28 09:27:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:27:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 38 [2021-10-28 09:27:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:27:40,155 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:27:40,155 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:27:40,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:27:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:27:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:27:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:27:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:27:40,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-28 09:27:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:27:40,157 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:27:40,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 09:27:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:27:40,157 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:27:40,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:27:40,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr0REQUIRES_VIOLATION [2021-10-28 09:27:40,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr1REQUIRES_VIOLATION [2021-10-28 09:27:40,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr2REQUIRES_VIOLATION [2021-10-28 09:27:40,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr3REQUIRES_VIOLATION [2021-10-28 09:27:40,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr4REQUIRES_VIOLATION [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr5REQUIRES_VIOLATION [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr6REQUIRES_VIOLATION [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr7REQUIRES_VIOLATION [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr11REQUIRES_VIOLATION [2021-10-28 09:27:40,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr12REQUIRES_VIOLATION [2021-10-28 09:27:40,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr13REQUIRES_VIOLATION [2021-10-28 09:27:40,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr14REQUIRES_VIOLATION [2021-10-28 09:27:40,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr0REQUIRES_VIOLATION [2021-10-28 09:27:40,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr1REQUIRES_VIOLATION [2021-10-28 09:27:40,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr2REQUIRES_VIOLATION [2021-10-28 09:27:40,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr3REQUIRES_VIOLATION [2021-10-28 09:27:40,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr4REQUIRES_VIOLATION [2021-10-28 09:27:40,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr5REQUIRES_VIOLATION [2021-10-28 09:27:40,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-28 09:27:40,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-28 09:27:40,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-28 09:27:40,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-28 09:27:40,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-28 09:27:40,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-28 09:27:40,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr0REQUIRES_VIOLATION [2021-10-28 09:27:40,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr1REQUIRES_VIOLATION [2021-10-28 09:27:40,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr2REQUIRES_VIOLATION [2021-10-28 09:27:40,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr3REQUIRES_VIOLATION [2021-10-28 09:27:40,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr4REQUIRES_VIOLATION [2021-10-28 09:27:40,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr5REQUIRES_VIOLATION [2021-10-28 09:27:40,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr6REQUIRES_VIOLATION [2021-10-28 09:27:40,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr7REQUIRES_VIOLATION [2021-10-28 09:27:40,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:27:40,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr0REQUIRES_VIOLATION [2021-10-28 09:27:40,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr1REQUIRES_VIOLATION [2021-10-28 09:27:40,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr2REQUIRES_VIOLATION [2021-10-28 09:27:40,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr3REQUIRES_VIOLATION [2021-10-28 09:27:40,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:27:40,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-28 09:27:40,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-28 09:27:40,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-28 09:27:40,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-28 09:27:40,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-28 09:27:40,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-28 09:27:40,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-28 09:27:40,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-28 09:27:40,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:27:40,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 09:27:40,384 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:27:40,386 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:27:40,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:27:40 BoogieIcfgContainer [2021-10-28 09:27:40,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:27:40,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:27:40,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:27:40,390 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:27:40,391 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:23:26" (3/4) ... [2021-10-28 09:27:40,393 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:27:40,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 09:27:40,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet_tree [2021-10-28 09:27:40,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:27:40,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_del [2021-10-28 09:27:40,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:27:40,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure min [2021-10-28 09:27:40,401 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure task [2021-10-28 09:27:40,401 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure size [2021-10-28 09:27:40,401 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_cycle_if_not [2021-10-28 09:27:40,401 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-28 09:27:40,401 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-28 09:27:40,401 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_inorder [2021-10-28 09:27:40,420 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2021-10-28 09:27:40,421 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 09:27:40,422 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 09:27:40,422 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:27:40,511 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:27:40,511 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:27:40,512 INFO L168 Benchmark]: Toolchain (without parser) took 255330.83 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 43.9 MB in the beginning and 35.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:40,513 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 65.0 MB. Free memory is still 44.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:27:40,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.90 ms. Allocated memory is still 65.0 MB. Free memory was 43.8 MB in the beginning and 44.7 MB in the end (delta: -915.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:40,514 INFO L168 Benchmark]: Boogie Preprocessor took 66.56 ms. Allocated memory is still 65.0 MB. Free memory was 44.7 MB in the beginning and 42.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:40,514 INFO L168 Benchmark]: RCFGBuilder took 1080.56 ms. Allocated memory is still 65.0 MB. Free memory was 42.0 MB in the beginning and 33.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:40,514 INFO L168 Benchmark]: TraceAbstraction took 253701.44 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 33.0 MB in the beginning and 41.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:40,515 INFO L168 Benchmark]: Witness Printer took 121.26 ms. Allocated memory is still 98.6 MB. Free memory was 41.0 MB in the beginning and 35.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:27:40,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 65.0 MB. Free memory is still 44.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 354.90 ms. Allocated memory is still 65.0 MB. Free memory was 43.8 MB in the beginning and 44.7 MB in the end (delta: -915.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.56 ms. Allocated memory is still 65.0 MB. Free memory was 44.7 MB in the beginning and 42.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1080.56 ms. Allocated memory is still 65.0 MB. Free memory was 42.0 MB in the beginning and 33.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 253701.44 ms. Allocated memory was 65.0 MB in the beginning and 98.6 MB in the end (delta: 33.6 MB). Free memory was 33.0 MB in the beginning and 41.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * Witness Printer took 121.26 ms. Allocated memory is still 98.6 MB. Free memory was 41.0 MB in the beginning and 35.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 101]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 41]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 41]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 31]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 31]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 85]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 85]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 88]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 88]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 65]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 65]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 67]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 67]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 188 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 253.6s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 194.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1267 SDtfs, 474 SDslu, 3399 SDs, 0 SdLazy, 1162 SolverSat, 152 SolverUnsat, 94 SolverUnknown, 0 SolverNotchecked, 192.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 21.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 56.1s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 296 ConstructedInterpolants, 31 QuantifiedInterpolants, 1673 SizeOfPredicates, 12 NumberOfNonLiveVariables, 924 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 68/86 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 55 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:27:40,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd5874a7-9e8b-4527-8437-15149f4579ab/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...