./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:50:10,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:50:10,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:50:10,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:50:10,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:50:10,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:50:10,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:50:10,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:50:10,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:50:10,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:50:10,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:50:10,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:50:10,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:50:10,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:50:10,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:50:10,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:50:10,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:50:10,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:50:10,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:50:10,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:50:10,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:50:10,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:50:10,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:50:10,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:50:10,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:50:10,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:50:10,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:50:10,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:50:10,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:50:10,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:50:10,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:50:10,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:50:10,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:50:10,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:50:10,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:50:10,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:50:10,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:50:10,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:50:10,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:50:10,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:50:10,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:50:10,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-13 00:50:10,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:50:10,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:50:10,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:50:10,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:50:10,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:50:10,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:50:10,461 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:50:10,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:50:10,462 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:50:10,462 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:50:10,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:50:10,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:50:10,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:50:10,464 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:50:10,465 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:50:10,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:50:10,466 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:50:10,466 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:50:10,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:50:10,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:50:10,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:50:10,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:50:10,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:50:10,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:50:10,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:50:10,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:50:10,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:50:10,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:50:10,471 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_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-10-13 00:50:10,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:50:10,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:50:10,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:50:10,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:50:10,827 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:50:10,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-13 00:50:10,910 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/416dc08f4/75d44188884f409fbc603aa88dc099ca/FLAGa5b219b28 [2021-10-13 00:50:11,462 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:50:11,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-13 00:50:11,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/416dc08f4/75d44188884f409fbc603aa88dc099ca/FLAGa5b219b28 [2021-10-13 00:50:11,784 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/416dc08f4/75d44188884f409fbc603aa88dc099ca [2021-10-13 00:50:11,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:50:11,789 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:50:11,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:50:11,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:50:11,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:50:11,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:50:11" (1/1) ... [2021-10-13 00:50:11,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2418d829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:11, skipping insertion in model container [2021-10-13 00:50:11,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:50:11" (1/1) ... [2021-10-13 00:50:11,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:50:11,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:50:12,040 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_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-13 00:50:12,059 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:12,061 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:12,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:50:12,096 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) [2021-10-13 00:50:12,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@785b92d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:12, skipping insertion in model container [2021-10-13 00:50:12,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:50:12,098 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-13 00:50:12,100 INFO L168 Benchmark]: Toolchain (without parser) took 309.77 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 96.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:12,101 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 97.8 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:50:12,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.17 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 96.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:50:12,105 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 121.6 MB. Free memory was 97.8 MB in the beginning and 97.8 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.17 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 96.6 MB in the end (delta: -10.3 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-4e77c04 [2021-10-13 00:50:14,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:50:14,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:50:14,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:50:14,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:50:14,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:50:14,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:50:14,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:50:14,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:50:14,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:50:14,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:50:14,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:50:14,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:50:14,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:50:14,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:50:14,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:50:14,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:50:14,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:50:14,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:50:14,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:50:14,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:50:14,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:50:14,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:50:14,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:50:14,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:50:14,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:50:14,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:50:14,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:50:14,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:50:14,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:50:14,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:50:14,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:50:14,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:50:14,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:50:14,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:50:14,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:50:14,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:50:14,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:50:14,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:50:14,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:50:14,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:50:14,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-10-13 00:50:14,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:50:14,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:50:14,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:50:14,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:50:14,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:50:14,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:50:14,987 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:50:14,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:50:14,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:50:14,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:50:14,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:50:14,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:50:14,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:50:14,989 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:50:14,989 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:50:14,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:50:14,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:50:14,990 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 00:50:14,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 00:50:14,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:50:14,991 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:50:14,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:50:14,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:50:14,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:50:14,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:50:14,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:50:14,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:50:14,993 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-13 00:50:14,993 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 00:50:14,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:50:14,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 00:50:14,994 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_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-10-13 00:50:15,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:50:15,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:50:15,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:50:15,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:50:15,448 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:50:15,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-13 00:50:15,531 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/415ad97fa/dc7fcc788d2c401f80ede9965238ff59/FLAGd6aba2baa [2021-10-13 00:50:16,089 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:50:16,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-13 00:50:16,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/415ad97fa/dc7fcc788d2c401f80ede9965238ff59/FLAGd6aba2baa [2021-10-13 00:50:16,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/data/415ad97fa/dc7fcc788d2c401f80ede9965238ff59 [2021-10-13 00:50:16,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:50:16,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:50:16,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:50:16,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:50:16,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:50:16,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505ac746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16, skipping insertion in model container [2021-10-13 00:50:16,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:50:16,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:50:16,636 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_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-13 00:50:16,653 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:16,657 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:16,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:50:16,704 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 00:50:16,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:50:16,716 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_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-13 00:50:16,723 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:16,726 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:16,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:50:16,761 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:50:16,800 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_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-13 00:50:16,820 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:16,822 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 00:50:16,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:50:16,884 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:50:16,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16 WrapperNode [2021-10-13 00:50:16,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:50:16,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:50:16,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:50:16,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:50:16,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:16,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:17,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:50:17,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:50:17,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:50:17,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:50:17,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (1/1) ... [2021-10-13 00:50:17,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:50:17,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:50:17,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:50:17,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:50:17,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:50:17,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:50:17,124 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-10-13 00:50:17,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:50:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-13 00:50:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-13 00:50:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-13 00:50:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-13 00:50:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-13 00:50:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-13 00:50:17,126 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-10-13 00:50:17,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:50:17,127 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-13 00:50:17,127 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:50:17,127 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:50:17,128 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:50:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 00:50:17,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-10-13 00:50:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-10-13 00:50:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:50:17,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:50:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:50:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:50:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-13 00:50:17,131 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-13 00:50:17,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:50:17,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 00:50:17,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:50:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-13 00:50:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 00:50:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:50:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-13 00:50:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:50:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-13 00:50:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-13 00:50:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-10-13 00:50:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-13 00:50:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:50:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:50:17,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 00:50:17,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:50:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-13 00:50:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-13 00:50:18,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:50:18,256 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 00:50:18,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:50:18 BoogieIcfgContainer [2021-10-13 00:50:18,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:50:18,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:50:18,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:50:18,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:50:18,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:50:16" (1/3) ... [2021-10-13 00:50:18,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f9c600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:50:18, skipping insertion in model container [2021-10-13 00:50:18,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:50:16" (2/3) ... [2021-10-13 00:50:18,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f9c600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:50:18, skipping insertion in model container [2021-10-13 00:50:18,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:50:18" (3/3) ... [2021-10-13 00:50:18,269 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-13 00:50:18,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:50:18,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-13 00:50:18,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:50:18,333 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 00:50:18,334 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-13 00:50:18,358 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) [2021-10-13 00:50:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 00:50:18,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:18,367 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:18,368 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:18,375 INFO L82 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-10-13 00:50:18,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:18,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901837825] [2021-10-13 00:50:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:18,390 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:18,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:18,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 00:50:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:50:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:18,663 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 [2021-10-13 00:50:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:18,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:18,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:18,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901837825] [2021-10-13 00:50:18,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901837825] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:18,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:18,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 00:50:18,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56818442] [2021-10-13 00:50:18,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:50:18,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:50:18,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:50:18,801 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) [2021-10-13 00:50:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:19,277 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-10-13 00:50:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:50:19,281 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 [2021-10-13 00:50:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:19,295 INFO L225 Difference]: With dead ends: 186 [2021-10-13 00:50:19,298 INFO L226 Difference]: Without dead ends: 182 [2021-10-13 00:50:19,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:50:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-13 00:50:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-10-13 00:50:19,360 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) [2021-10-13 00:50:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-10-13 00:50:19,368 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-10-13 00:50:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:19,369 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-10-13 00:50:19,369 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) [2021-10-13 00:50:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-10-13 00:50:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 00:50:19,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:19,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:19,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:19,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:50:19,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-10-13 00:50:19,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:19,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602836059] [2021-10-13 00:50:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:19,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:19,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:19,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 00:50:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:50:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:19,735 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 [2021-10-13 00:50:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:19,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:19,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:19,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602836059] [2021-10-13 00:50:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602836059] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:19,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:19,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 00:50:19,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189421150] [2021-10-13 00:50:19,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:50:19,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:50:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:50:19,908 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) [2021-10-13 00:50:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:20,559 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-10-13 00:50:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:50:20,561 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 [2021-10-13 00:50:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:20,564 INFO L225 Difference]: With dead ends: 179 [2021-10-13 00:50:20,564 INFO L226 Difference]: Without dead ends: 179 [2021-10-13 00:50:20,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:50:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-13 00:50:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-10-13 00:50:20,583 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) [2021-10-13 00:50:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-10-13 00:50:20,587 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-10-13 00:50:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:20,588 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-10-13 00:50:20,588 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) [2021-10-13 00:50:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-10-13 00:50:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:50:20,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:20,590 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:20,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:20,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:50:20,805 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-10-13 00:50:20,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:20,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022819545] [2021-10-13 00:50:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:20,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:20,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:20,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:20,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 00:50:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:50:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:21,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:21,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:21,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022819545] [2021-10-13 00:50:21,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022819545] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:21,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:21,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-13 00:50:21,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979293275] [2021-10-13 00:50:21,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:50:21,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:21,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:50:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:50:21,375 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) [2021-10-13 00:50:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:21,593 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-10-13 00:50:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:50:21,594 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 [2021-10-13 00:50:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:21,597 INFO L225 Difference]: With dead ends: 244 [2021-10-13 00:50:21,599 INFO L226 Difference]: Without dead ends: 244 [2021-10-13 00:50:21,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:50:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-13 00:50:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-10-13 00:50:21,644 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) [2021-10-13 00:50:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-10-13 00:50:21,651 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-10-13 00:50:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:21,652 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-10-13 00:50:21,652 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) [2021-10-13 00:50:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-10-13 00:50:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:50:21,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:21,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:21,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:21,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:50:21,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-10-13 00:50:21,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:21,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991542715] [2021-10-13 00:50:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:21,870 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:21,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:21,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:21,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 00:50:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:21,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:50:21,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:22,017 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 [2021-10-13 00:50:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:22,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:22,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:22,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991542715] [2021-10-13 00:50:22,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991542715] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:22,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:22,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 00:50:22,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8284555] [2021-10-13 00:50:22,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:50:22,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:50:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:50:22,233 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) [2021-10-13 00:50:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:22,986 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-10-13 00:50:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:50:22,991 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 [2021-10-13 00:50:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:22,994 INFO L225 Difference]: With dead ends: 225 [2021-10-13 00:50:22,994 INFO L226 Difference]: Without dead ends: 225 [2021-10-13 00:50:22,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:50:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-13 00:50:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-10-13 00:50:23,011 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) [2021-10-13 00:50:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2021-10-13 00:50:23,015 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 14 [2021-10-13 00:50:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:23,016 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2021-10-13 00:50:23,016 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) [2021-10-13 00:50:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2021-10-13 00:50:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:50:23,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:23,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:23,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:23,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:50:23,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:23,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-10-13 00:50:23,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:23,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737599715] [2021-10-13 00:50:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:23,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:23,234 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:23,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 00:50:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:50:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:23,399 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 [2021-10-13 00:50:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:23,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:23,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:23,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737599715] [2021-10-13 00:50:23,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737599715] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:23,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:23,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 00:50:23,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808531706] [2021-10-13 00:50:23,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:50:23,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:50:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:50:23,886 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) [2021-10-13 00:50:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:25,121 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2021-10-13 00:50:25,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:50:25,122 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 [2021-10-13 00:50:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:25,125 INFO L225 Difference]: With dead ends: 237 [2021-10-13 00:50:25,125 INFO L226 Difference]: Without dead ends: 237 [2021-10-13 00:50:25,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:50:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-13 00:50:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-10-13 00:50:25,142 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) [2021-10-13 00:50:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-10-13 00:50:25,146 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-10-13 00:50:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:25,147 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-10-13 00:50:25,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 00:50:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-10-13 00:50:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:50:25,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:25,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:25,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:25,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:50:25,370 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-10-13 00:50:25,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:25,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420810178] [2021-10-13 00:50:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:25,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:25,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:25,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 00:50:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:50:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:25,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:50:25,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:25,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420810178] [2021-10-13 00:50:25,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420810178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:50:25,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:50:25,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-13 00:50:25,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71634694] [2021-10-13 00:50:25,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:50:25,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:50:25,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:50:25,889 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) [2021-10-13 00:50:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:50:26,075 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2021-10-13 00:50:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:50:26,076 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 [2021-10-13 00:50:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:50:26,079 INFO L225 Difference]: With dead ends: 250 [2021-10-13 00:50:26,079 INFO L226 Difference]: Without dead ends: 250 [2021-10-13 00:50:26,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:50:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-13 00:50:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-10-13 00:50:26,093 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) [2021-10-13 00:50:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-10-13 00:50:26,096 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 21 [2021-10-13 00:50:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:50:26,097 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-10-13 00:50:26,097 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) [2021-10-13 00:50:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-10-13 00:50:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 00:50:26,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:50:26,101 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:50:26,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:50:26,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:50:26,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:50:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:50:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1907346070, now seen corresponding path program 1 times [2021-10-13 00:50:26,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:50:26,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15686268] [2021-10-13 00:50:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:50:26,318 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:50:26,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:50:26,319 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:50:26,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 00:50:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:50:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:50:26,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:50:26,651 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 [2021-10-13 00:50:26,667 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 [2021-10-13 00:50:26,984 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:50:26,985 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 [2021-10-13 00:50:26,999 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:50:26,999 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 [2021-10-13 00:50:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 00:50:27,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:50:29,321 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_19))))) (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0) (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_19 (_ bv12 32)) c_nondet_tree_~n~0.base)))))) is different from false [2021-10-13 00:50:44,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:50:44,237 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 [2021-10-13 00:50:44,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:50:44,268 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 [2021-10-13 00:50:47,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:50:47,974 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 [2021-10-13 00:50:48,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:50:48,007 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 [2021-10-13 00:50:53,082 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 [2021-10-13 00:50:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2021-10-13 00:50:53,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:50:53,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15686268] [2021-10-13 00:50:53,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15686268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 00:50:53,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:50:53,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 00:50:53,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530689372] [2021-10-13 00:50:53,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:50:53,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:50:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:50:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=50, Unknown=7, NotChecked=30, Total=110 [2021-10-13 00:50:53,270 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) [2021-10-13 00:54:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:04,259 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-10-13 00:54:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:54:04,260 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 [2021-10-13 00:54:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:04,267 INFO L225 Difference]: With dead ends: 145 [2021-10-13 00:54:04,267 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 00:54:04,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16502.5ms TimeCoverageRelationStatistics Valid=29, Invalid=62, Unknown=7, NotChecked=34, Total=132 [2021-10-13 00:54:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 00:54:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-13 00:54:04,274 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) [2021-10-13 00:54:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-10-13 00:54:04,279 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 38 [2021-10-13 00:54:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:04,280 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-10-13 00:54:04,280 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) [2021-10-13 00:54:04,280 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-10-13 00:54:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 00:54:04,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:04,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:04,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:04,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:54:04,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting tree_inorderErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-13 00:54:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2132967547, now seen corresponding path program 1 times [2021-10-13 00:54:04,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 00:54:04,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390472689] [2021-10-13 00:54:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:04,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 00:54:04,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 00:54:04,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 00:54:04,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 00:54:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:54:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:04,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 00:54:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:54:05,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 00:54:05,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390472689] [2021-10-13 00:54:05,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390472689] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:05,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:05,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-13 00:54:05,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858487240] [2021-10-13 00:54:05,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:54:05,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 00:54:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:54:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:54:05,111 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) [2021-10-13 00:54:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:05,150 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2021-10-13 00:54:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:54:05,150 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 [2021-10-13 00:54:05,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:05,151 INFO L225 Difference]: With dead ends: 28 [2021-10-13 00:54:05,151 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:54:05,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:54:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:54:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:54:05,152 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) [2021-10-13 00:54:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:54:05,152 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-13 00:54:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:05,152 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:54:05,153 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) [2021-10-13 00:54:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:54:05,153 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:54:05,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:54:05,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr0REQUIRES_VIOLATION [2021-10-13 00:54:05,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr1REQUIRES_VIOLATION [2021-10-13 00:54:05,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr2REQUIRES_VIOLATION [2021-10-13 00:54:05,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr3REQUIRES_VIOLATION [2021-10-13 00:54:05,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr4REQUIRES_VIOLATION [2021-10-13 00:54:05,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr5REQUIRES_VIOLATION [2021-10-13 00:54:05,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr6REQUIRES_VIOLATION [2021-10-13 00:54:05,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr7REQUIRES_VIOLATION [2021-10-13 00:54:05,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr11REQUIRES_VIOLATION [2021-10-13 00:54:05,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr12REQUIRES_VIOLATION [2021-10-13 00:54:05,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr13REQUIRES_VIOLATION [2021-10-13 00:54:05,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr14REQUIRES_VIOLATION [2021-10-13 00:54:05,160 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr0REQUIRES_VIOLATION [2021-10-13 00:54:05,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr1REQUIRES_VIOLATION [2021-10-13 00:54:05,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr2REQUIRES_VIOLATION [2021-10-13 00:54:05,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr3REQUIRES_VIOLATION [2021-10-13 00:54:05,161 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr4REQUIRES_VIOLATION [2021-10-13 00:54:05,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr5REQUIRES_VIOLATION [2021-10-13 00:54:05,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-13 00:54:05,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-13 00:54:05,162 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-13 00:54:05,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-13 00:54:05,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-13 00:54:05,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-13 00:54:05,163 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr0REQUIRES_VIOLATION [2021-10-13 00:54:05,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr1REQUIRES_VIOLATION [2021-10-13 00:54:05,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr2REQUIRES_VIOLATION [2021-10-13 00:54:05,164 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr3REQUIRES_VIOLATION [2021-10-13 00:54:05,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr4REQUIRES_VIOLATION [2021-10-13 00:54:05,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr5REQUIRES_VIOLATION [2021-10-13 00:54:05,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr6REQUIRES_VIOLATION [2021-10-13 00:54:05,165 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr7REQUIRES_VIOLATION [2021-10-13 00:54:05,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,166 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:54:05,167 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr0REQUIRES_VIOLATION [2021-10-13 00:54:05,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr1REQUIRES_VIOLATION [2021-10-13 00:54:05,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr2REQUIRES_VIOLATION [2021-10-13 00:54:05,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr3REQUIRES_VIOLATION [2021-10-13 00:54:05,168 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:54:05,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-13 00:54:05,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-13 00:54:05,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-13 00:54:05,169 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-13 00:54:05,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-13 00:54:05,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-13 00:54:05,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-13 00:54:05,170 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-13 00:54:05,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:05,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 00:54:05,395 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:54:05,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:54:05 BoogieIcfgContainer [2021-10-13 00:54:05,400 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:54:05,401 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:54:05,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:54:05,402 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:54:05,402 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:50:18" (3/4) ... [2021-10-13 00:54:05,406 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:54:05,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-13 00:54:05,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet_tree [2021-10-13 00:54:05,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-13 00:54:05,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_del [2021-10-13 00:54:05,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-13 00:54:05,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure min [2021-10-13 00:54:05,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure task [2021-10-13 00:54:05,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure size [2021-10-13 00:54:05,415 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_cycle_if_not [2021-10-13 00:54:05,416 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-13 00:54:05,416 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-13 00:54:05,416 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_inorder [2021-10-13 00:54:05,435 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2021-10-13 00:54:05,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-13 00:54:05,437 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 00:54:05,438 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:54:05,518 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:54:05,518 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:54:05,519 INFO L168 Benchmark]: Toolchain (without parser) took 229089.08 ms. Allocated memory was 52.4 MB in the beginning and 107.0 MB in the end (delta: 54.5 MB). Free memory was 28.4 MB in the beginning and 31.3 MB in the end (delta: -2.9 MB). Peak memory consumption was 52.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:05,520 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:54:05,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 450.28 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 28.2 MB in the beginning and 48.4 MB in the end (delta: -20.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:05,521 INFO L168 Benchmark]: Boogie Preprocessor took 117.36 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 45.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:05,522 INFO L168 Benchmark]: RCFGBuilder took 1254.44 ms. Allocated memory is still 67.1 MB. Free memory was 45.8 MB in the beginning and 47.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:05,522 INFO L168 Benchmark]: TraceAbstraction took 227138.55 ms. Allocated memory was 67.1 MB in the beginning and 107.0 MB in the end (delta: 39.8 MB). Free memory was 47.2 MB in the beginning and 36.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:05,523 INFO L168 Benchmark]: Witness Printer took 117.07 ms. Allocated memory is still 107.0 MB. Free memory was 36.6 MB in the beginning and 31.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:54:05,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 52.4 MB. Free memory is still 33.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 450.28 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 28.2 MB in the beginning and 48.4 MB in the end (delta: -20.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 117.36 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 45.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1254.44 ms. Allocated memory is still 67.1 MB. Free memory was 45.8 MB in the beginning and 47.7 MB in the end (delta: -1.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 227138.55 ms. Allocated memory was 67.1 MB in the beginning and 107.0 MB in the end (delta: 39.8 MB). Free memory was 47.2 MB in the beginning and 36.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. * Witness Printer took 117.07 ms. Allocated memory is still 107.0 MB. Free memory was 36.6 MB in the beginning and 31.3 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 227067.0ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 31.1ms, AutomataDifference: 194653.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1268 SDtfs, 474 SDslu, 3421 SDs, 0 SdLazy, 1055 SolverSat, 152 SolverUnsat, 94 SolverUnknown, 0 SolverNotchecked, 192248.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16974.7ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 193.3ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 128.3ms SsaConstructionTime, 393.3ms SatisfiabilityAnalysisTime, 29128.7ms 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! [2021-10-13 00:54:05,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81b22a0f-7bd5-41ab-a5a8-a0b58b96a020/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...