./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:04:14,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:04:14,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:04:14,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:04:14,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:04:14,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:04:14,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:04:14,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:04:14,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:04:14,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:04:14,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:04:14,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:04:14,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:04:14,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:04:14,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:04:14,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:04:14,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:04:14,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:04:14,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:04:14,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:04:14,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:04:14,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:04:14,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:04:14,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:04:14,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:04:14,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:04:14,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:04:14,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:04:14,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:04:14,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:04:14,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:04:14,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:04:14,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:04:14,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:04:14,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:04:14,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:04:14,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:04:14,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:04:14,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:04:14,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:04:14,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:04:14,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-21 19:04:15,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:04:15,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:04:15,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:04:15,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:04:15,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:04:15,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:04:15,024 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:04:15,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:04:15,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:04:15,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:04:15,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:04:15,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:04:15,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:04:15,027 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:04:15,027 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:04:15,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:04:15,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:04:15,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:04:15,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:04:15,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:04:15,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:04:15,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:04:15,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:04:15,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:04:15,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:04:15,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:04:15,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:04:15,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:04:15,032 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_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-21 19:04:15,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:04:15,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:04:15,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:04:15,385 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:04:15,386 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:04:15,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-21 19:04:15,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/753590e30/7df0b8022e9542e1871e57a4dc178fb0/FLAG37693b389 [2021-10-21 19:04:15,989 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:04:15,990 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-21 19:04:15,998 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/753590e30/7df0b8022e9542e1871e57a4dc178fb0/FLAG37693b389 [2021-10-21 19:04:16,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/753590e30/7df0b8022e9542e1871e57a4dc178fb0 [2021-10-21 19:04:16,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:04:16,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:04:16,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:04:16,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:04:16,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:04:16,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:04:16" (1/1) ... [2021-10-21 19:04:16,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6612f123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:16, skipping insertion in model container [2021-10-21 19:04:16,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:04:16" (1/1) ... [2021-10-21 19:04:16,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:04:16,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:04:16,846 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_0bead83c-328d-4c7a-87f1-f7f6860ee17e/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-21 19:04:16,876 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:16,901 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:16,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:04:16,968 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) [2021-10-21 19:04:16,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63e0325f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:16, skipping insertion in model container [2021-10-21 19:04:16,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:04:16,971 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-21 19:04:16,985 INFO L168 Benchmark]: Toolchain (without parser) took 592.04 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 81.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:04:16,988 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:04:16,999 INFO L168 Benchmark]: CACSL2BoogieTranslator took 571.61 ms. Allocated memory is still 107.0 MB. Free memory was 72.0 MB in the beginning and 81.0 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:04:17,003 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory was 60.2 MB in the beginning and 60.2 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 571.61 ms. Allocated memory is still 107.0 MB. Free memory was 72.0 MB in the beginning and 81.0 MB in the end (delta: -9.0 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-e943c26 [2021-10-21 19:04:20,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:04:20,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:04:20,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:04:20,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:04:20,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:04:20,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:04:20,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:04:20,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:04:20,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:04:20,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:04:20,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:04:20,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:04:20,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:04:20,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:04:20,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:04:20,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:04:20,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:04:20,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:04:20,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:04:20,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:04:20,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:04:20,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:04:20,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:04:20,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:04:20,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:04:20,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:04:20,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:04:20,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:04:20,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:04:20,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:04:20,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:04:20,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:04:20,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:04:20,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:04:20,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:04:20,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:04:20,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:04:20,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:04:20,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:04:20,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:04:20,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-10-21 19:04:20,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:04:20,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:04:20,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:04:20,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:04:20,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:04:20,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:04:20,708 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:04:20,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:04:20,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:04:20,708 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:04:20,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:04:20,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:04:20,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:04:20,709 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:04:20,709 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:04:20,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:04:20,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:04:20,710 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:04:20,710 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:04:20,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:04:20,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:04:20,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:04:20,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:04:20,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:04:20,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:04:20,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:04:20,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:04:20,712 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:04:20,712 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:04:20,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:04:20,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:04:20,712 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_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-21 19:04:21,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:04:21,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:04:21,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:04:21,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:04:21,104 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:04:21,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-21 19:04:21,194 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/db91debc2/5c260cbb0087476c8e526cf17148a81d/FLAG8b9639461 [2021-10-21 19:04:21,862 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:04:21,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-21 19:04:21,872 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/db91debc2/5c260cbb0087476c8e526cf17148a81d/FLAG8b9639461 [2021-10-21 19:04:21,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/data/db91debc2/5c260cbb0087476c8e526cf17148a81d [2021-10-21 19:04:21,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:04:21,898 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:04:21,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:04:21,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:04:21,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:04:21,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:04:21" (1/1) ... [2021-10-21 19:04:21,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dfcb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:21, skipping insertion in model container [2021-10-21 19:04:21,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:04:21" (1/1) ... [2021-10-21 19:04:21,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:04:21,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:04:22,129 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_0bead83c-328d-4c7a-87f1-f7f6860ee17e/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-21 19:04:22,149 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:22,152 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:22,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:04:22,206 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-21 19:04:22,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:04:22,216 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_0bead83c-328d-4c7a-87f1-f7f6860ee17e/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-21 19:04:22,227 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:22,233 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:22,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:04:22,271 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:04:22,288 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_0bead83c-328d-4c7a-87f1-f7f6860ee17e/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-21 19:04:22,309 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:22,311 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-21 19:04:22,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:04:22,352 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:04:22,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22 WrapperNode [2021-10-21 19:04:22,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:04:22,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:04:22,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:04:22,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:04:22,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:04:22,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:04:22,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:04:22,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:04:22,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (1/1) ... [2021-10-21 19:04:22,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:04:22,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:04:22,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:04:22,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:04:22,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:04:22,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-21 19:04:22,527 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-21 19:04:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-21 19:04:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-10-21 19:04:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:04:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-21 19:04:22,528 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:04:22,528 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:04:22,528 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:04:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:04:22,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-21 19:04:22,530 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-21 19:04:22,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:04:22,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:04:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:04:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:04:22,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-21 19:04:22,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-21 19:04:23,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:04:23,471 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:04:23,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:04:23 BoogieIcfgContainer [2021-10-21 19:04:23,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:04:23,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:04:23,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:04:23,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:04:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:04:21" (1/3) ... [2021-10-21 19:04:23,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399dfd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:04:23, skipping insertion in model container [2021-10-21 19:04:23,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:04:22" (2/3) ... [2021-10-21 19:04:23,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399dfd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:04:23, skipping insertion in model container [2021-10-21 19:04:23,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:04:23" (3/3) ... [2021-10-21 19:04:23,482 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-21 19:04:23,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:04:23,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-21 19:04:23,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:04:23,550 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:04:23,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-21 19:04:23,569 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) [2021-10-21 19:04:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:04:23,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:23,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:23,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-10-21 19:04:23,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:23,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143219673] [2021-10-21 19:04:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:23,600 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:23,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:23,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:23,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:04:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:23,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:04:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:23,847 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 [2021-10-21 19:04:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:23,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:23,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:04:23,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143219673] [2021-10-21 19:04:23,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143219673] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:23,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:23,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:04:23,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088907808] [2021-10-21 19:04:23,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:04:23,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:04:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:04:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:04:23,947 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) [2021-10-21 19:04:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:24,301 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-10-21 19:04:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:04:24,304 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 [2021-10-21 19:04:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:24,322 INFO L225 Difference]: With dead ends: 186 [2021-10-21 19:04:24,322 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 19:04:24,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:04:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 19:04:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-10-21 19:04:24,401 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) [2021-10-21 19:04:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-10-21 19:04:24,423 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-10-21 19:04:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:24,423 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-10-21 19:04:24,424 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) [2021-10-21 19:04:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-10-21 19:04:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:04:24,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:24,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:24,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:24,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:04:24,642 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-10-21 19:04:24,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:24,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136769678] [2021-10-21 19:04:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:24,644 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:24,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:24,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:04:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:04:24,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:24,856 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 [2021-10-21 19:04:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:24,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:25,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:04:25,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136769678] [2021-10-21 19:04:25,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136769678] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:25,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:25,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-21 19:04:25,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265531980] [2021-10-21 19:04:25,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:04:25,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:04:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:04:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:04:25,038 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) [2021-10-21 19:04:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:25,700 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-10-21 19:04:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:04:25,701 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 [2021-10-21 19:04:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:25,703 INFO L225 Difference]: With dead ends: 179 [2021-10-21 19:04:25,704 INFO L226 Difference]: Without dead ends: 179 [2021-10-21 19:04:25,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:04:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-21 19:04:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-10-21 19:04:25,716 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) [2021-10-21 19:04:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-10-21 19:04:25,719 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-10-21 19:04:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:25,719 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-10-21 19:04:25,719 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) [2021-10-21 19:04:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-10-21 19:04:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:04:25,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:25,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:25,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:25,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:04:25,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:25,933 INFO L82 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-10-21 19:04:25,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:25,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199870640] [2021-10-21 19:04:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:25,934 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:25,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:25,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:25,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:04:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:26,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:04:26,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:26,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:26,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:04:26,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199870640] [2021-10-21 19:04:26,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199870640] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:26,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:26,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-21 19:04:26,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538918953] [2021-10-21 19:04:26,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:04:26,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:04:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:04:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:26,581 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) [2021-10-21 19:04:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:26,761 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-10-21 19:04:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:04:26,762 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 [2021-10-21 19:04:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:26,766 INFO L225 Difference]: With dead ends: 244 [2021-10-21 19:04:26,766 INFO L226 Difference]: Without dead ends: 244 [2021-10-21 19:04:26,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:04:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-21 19:04:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-10-21 19:04:26,798 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) [2021-10-21 19:04:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-10-21 19:04:26,800 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-10-21 19:04:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:26,801 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-10-21 19:04:26,801 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) [2021-10-21 19:04:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-10-21 19:04:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:04:26,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:26,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:26,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:27,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:04:27,014 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-10-21 19:04:27,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:27,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182007513] [2021-10-21 19:04:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:27,016 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:27,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:27,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:27,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:04:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:04:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:27,245 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 [2021-10-21 19:04:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:27,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:27,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:04:27,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182007513] [2021-10-21 19:04:27,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182007513] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:27,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:27,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-21 19:04:27,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039758008] [2021-10-21 19:04:27,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:04:27,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:04:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:04:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:04:27,477 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) [2021-10-21 19:04:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:28,238 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-10-21 19:04:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:04:28,241 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 [2021-10-21 19:04:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:28,244 INFO L225 Difference]: With dead ends: 225 [2021-10-21 19:04:28,244 INFO L226 Difference]: Without dead ends: 225 [2021-10-21 19:04:28,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-21 19:04:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-10-21 19:04:28,286 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) [2021-10-21 19:04:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2021-10-21 19:04:28,289 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 14 [2021-10-21 19:04:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:28,290 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2021-10-21 19:04:28,290 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) [2021-10-21 19:04:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2021-10-21 19:04:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:04:28,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:28,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:04:28,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:28,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:04:28,504 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-10-21 19:04:28,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:28,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405719170] [2021-10-21 19:04:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:28,506 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:28,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:28,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-21 19:04:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:28,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:04:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:28,739 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 [2021-10-21 19:04:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:28,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:29,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:04:29,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405719170] [2021-10-21 19:04:29,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405719170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:29,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:29,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-21 19:04:29,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92592304] [2021-10-21 19:04:29,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:04:29,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:04:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:04:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:29,144 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) [2021-10-21 19:04:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:30,326 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2021-10-21 19:04:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:04:30,327 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 [2021-10-21 19:04:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:30,329 INFO L225 Difference]: With dead ends: 237 [2021-10-21 19:04:30,330 INFO L226 Difference]: Without dead ends: 237 [2021-10-21 19:04:30,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:04:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-21 19:04:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-10-21 19:04:30,341 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) [2021-10-21 19:04:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-10-21 19:04:30,344 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-10-21 19:04:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:30,344 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-10-21 19:04:30,345 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) [2021-10-21 19:04:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-10-21 19:04:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:04:30,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:30,346 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] [2021-10-21 19:04:30,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:30,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:04:30,561 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-10-21 19:04:30,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:30,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309258871] [2021-10-21 19:04:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:30,563 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:30,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-21 19:04:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:30,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:04:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:31,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:04:31,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:04:31,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309258871] [2021-10-21 19:04:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309258871] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:04:31,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:04:31,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-21 19:04:31,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158614799] [2021-10-21 19:04:31,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:04:31,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:04:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:04:31,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:04:31,247 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) [2021-10-21 19:04:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:04:31,494 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2021-10-21 19:04:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:04:31,496 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 [2021-10-21 19:04:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:04:31,498 INFO L225 Difference]: With dead ends: 250 [2021-10-21 19:04:31,499 INFO L226 Difference]: Without dead ends: 250 [2021-10-21 19:04:31,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:04:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-21 19:04:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-10-21 19:04:31,534 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) [2021-10-21 19:04:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-10-21 19:04:31,537 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 21 [2021-10-21 19:04:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:04:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-10-21 19:04:31,538 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) [2021-10-21 19:04:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-10-21 19:04:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:04:31,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:04:31,542 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] [2021-10-21 19:04:31,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:04:31,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:04:31,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:04:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:04:31,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1907346070, now seen corresponding path program 1 times [2021-10-21 19:04:31,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:04:31,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326331183] [2021-10-21 19:04:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:04:31,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:04:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:04:31,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:04:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-21 19:04:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:04:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:04:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:04:32,309 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 [2021-10-21 19:04:32,316 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 [2021-10-21 19:04:32,747 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:04:32,748 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 [2021-10-21 19:04:32,758 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:04:32,759 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 [2021-10-21 19:04:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:04:32,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:04:35,032 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 [2021-10-21 19:04:37,462 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0) (bvule .cse0 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_6)))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from false [2021-10-21 19:04:39,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:04:39,868 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 [2021-10-21 19:04:39,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:04:39,905 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 [2021-10-21 19:04:52,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:04:52,695 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 [2021-10-21 19:04:52,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:04:52,728 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 [2021-10-21 19:05:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 0 refuted. 4 times theorem prover too weak. 6 trivial. 4 not checked. [2021-10-21 19:05:23,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:05:23,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326331183] [2021-10-21 19:05:23,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326331183] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-21 19:05:23,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:05:23,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-21 19:05:23,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627211678] [2021-10-21 19:05:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:05:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:05:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:05:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=51, Unknown=6, NotChecked=30, Total=110 [2021-10-21 19:05:23,038 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) [2021-10-21 19:05:47,574 WARN L207 SmtUtils]: Spent 20.33 s on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-10-21 19:06:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:06:25,362 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-10-21 19:06:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:06:25,363 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 [2021-10-21 19:06:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:06:25,364 INFO L225 Difference]: With dead ends: 145 [2021-10-21 19:06:25,364 INFO L226 Difference]: Without dead ends: 142 [2021-10-21 19:06:25,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41098.7ms TimeCoverageRelationStatistics Valid=29, Invalid=62, Unknown=7, NotChecked=34, Total=132 [2021-10-21 19:06:25,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-21 19:06:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-21 19:06:25,370 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) [2021-10-21 19:06:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-10-21 19:06:25,372 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 38 [2021-10-21 19:06:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:06:25,372 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-10-21 19:06:25,373 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) [2021-10-21 19:06:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-10-21 19:06:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:06:25,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:06:25,375 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] [2021-10-21 19:06:25,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:06:25,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:06:25,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting tree_inorderErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-21 19:06:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:06:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2132967547, now seen corresponding path program 1 times [2021-10-21 19:06:25,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:06:25,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145021772] [2021-10-21 19:06:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:06:25,582 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:06:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:06:25,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:06:25,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-21 19:06:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:06:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:06:25,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:06:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:06:25,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:06:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:06:26,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:06:26,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145021772] [2021-10-21 19:06:26,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145021772] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:06:26,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:06:26,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-21 19:06:26,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196960488] [2021-10-21 19:06:26,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:06:26,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:06:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:06:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:06:26,160 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) [2021-10-21 19:06:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:06:26,189 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2021-10-21 19:06:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:06:26,190 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 [2021-10-21 19:06:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:06:26,190 INFO L225 Difference]: With dead ends: 28 [2021-10-21 19:06:26,190 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:06:26,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:06:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:06:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:06:26,191 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) [2021-10-21 19:06:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:06:26,191 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-21 19:06:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:06:26,191 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:06:26,192 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) [2021-10-21 19:06:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:06:26,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:06:26,194 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr0REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr1REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr2REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr3REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr4REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr5REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr6REQUIRES_VIOLATION [2021-10-21 19:06:26,195 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr7REQUIRES_VIOLATION [2021-10-21 19:06:26,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr11REQUIRES_VIOLATION [2021-10-21 19:06:26,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr12REQUIRES_VIOLATION [2021-10-21 19:06:26,196 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr13REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr14REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr0REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr1REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr2REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr3REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr4REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr5REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-21 19:06:26,197 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-21 19:06:26,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-21 19:06:26,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-21 19:06:26,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-21 19:06:26,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-21 19:06:26,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr0REQUIRES_VIOLATION [2021-10-21 19:06:26,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr1REQUIRES_VIOLATION [2021-10-21 19:06:26,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr2REQUIRES_VIOLATION [2021-10-21 19:06:26,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr3REQUIRES_VIOLATION [2021-10-21 19:06:26,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr4REQUIRES_VIOLATION [2021-10-21 19:06:26,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr5REQUIRES_VIOLATION [2021-10-21 19:06:26,199 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr6REQUIRES_VIOLATION [2021-10-21 19:06:26,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr7REQUIRES_VIOLATION [2021-10-21 19:06:26,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,200 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:06:26,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr0REQUIRES_VIOLATION [2021-10-21 19:06:26,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr1REQUIRES_VIOLATION [2021-10-21 19:06:26,202 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr2REQUIRES_VIOLATION [2021-10-21 19:06:26,202 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr3REQUIRES_VIOLATION [2021-10-21 19:06:26,202 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:06:26,202 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-21 19:06:26,202 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-21 19:06:26,203 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-21 19:06:26,203 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-21 19:06:26,203 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-21 19:06:26,203 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-21 19:06:26,203 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-21 19:06:26,204 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-21 19:06:26,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-21 19:06:26,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:06:26,421 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:06:26,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:06:26 BoogieIcfgContainer [2021-10-21 19:06:26,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:06:26,424 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:06:26,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:06:26,425 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:06:26,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:04:23" (3/4) ... [2021-10-21 19:06:26,429 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:06:26,436 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:06:26,436 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet_tree [2021-10-21 19:06:26,436 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:06:26,436 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_del [2021-10-21 19:06:26,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:06:26,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure min [2021-10-21 19:06:26,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure task [2021-10-21 19:06:26,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure size [2021-10-21 19:06:26,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_cycle_if_not [2021-10-21 19:06:26,438 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-21 19:06:26,438 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-21 19:06:26,438 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_inorder [2021-10-21 19:06:26,446 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2021-10-21 19:06:26,447 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-21 19:06:26,447 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:06:26,448 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:06:26,516 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:06:26,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:06:26,518 INFO L168 Benchmark]: Toolchain (without parser) took 124619.27 ms. Allocated memory was 58.7 MB in the beginning and 117.4 MB in the end (delta: 58.7 MB). Free memory was 39.8 MB in the beginning and 63.1 MB in the end (delta: -23.3 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:06:26,518 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 44.0 MB. Free memory was 25.2 MB in the beginning and 25.1 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:06:26,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.34 ms. Allocated memory is still 58.7 MB. Free memory was 39.5 MB in the beginning and 40.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:06:26,519 INFO L168 Benchmark]: Boogie Preprocessor took 59.02 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 38.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:06:26,519 INFO L168 Benchmark]: RCFGBuilder took 1054.00 ms. Allocated memory is still 58.7 MB. Free memory was 38.2 MB in the beginning and 26.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:06:26,520 INFO L168 Benchmark]: TraceAbstraction took 122948.61 ms. Allocated memory was 58.7 MB in the beginning and 117.4 MB in the end (delta: 58.7 MB). Free memory was 25.9 MB in the beginning and 69.2 MB in the end (delta: -43.4 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:06:26,520 INFO L168 Benchmark]: Witness Printer took 92.32 ms. Allocated memory is still 117.4 MB. Free memory was 69.2 MB in the beginning and 63.1 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:06:26,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 44.0 MB. Free memory was 25.2 MB in the beginning and 25.1 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 456.34 ms. Allocated memory is still 58.7 MB. Free memory was 39.5 MB in the beginning and 40.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.02 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 38.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1054.00 ms. Allocated memory is still 58.7 MB. Free memory was 38.2 MB in the beginning and 26.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 122948.61 ms. Allocated memory was 58.7 MB in the beginning and 117.4 MB in the end (delta: 58.7 MB). Free memory was 25.9 MB in the beginning and 69.2 MB in the end (delta: -43.4 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * Witness Printer took 92.32 ms. Allocated memory is still 117.4 MB. Free memory was 69.2 MB in the beginning and 63.1 MB in the end (delta: 6.1 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: 122878.2ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 20.8ms, AutomataDifference: 65827.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1268 SDtfs, 476 SDslu, 3456 SDs, 0 SdLazy, 1171 SolverSat, 152 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 40115.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41636.2ms 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: 235.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 134.7ms SsaConstructionTime, 556.7ms SatisfiabilityAnalysisTime, 53378.3ms InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 296 ConstructedInterpolants, 31 QuantifiedInterpolants, 1674 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! [2021-10-21 19:06:26,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bead83c-328d-4c7a-87f1-f7f6860ee17e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...