./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d5c80ebc24229a709692e92e1e7cb6c93b163ba ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:19:57,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:19:57,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:19:57,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:19:57,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:19:57,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:19:57,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:19:57,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:19:57,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:19:57,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:19:57,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:19:57,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:19:57,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:19:57,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:19:57,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:19:57,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:19:57,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:19:57,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:19:57,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:19:57,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:19:57,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:19:57,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:19:57,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:19:57,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:19:57,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:19:57,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:19:57,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:19:57,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:19:57,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:19:57,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:19:57,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:19:57,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:19:57,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:19:57,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:19:57,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:19:57,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:19:57,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:19:57,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:19:57,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:19:57,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:19:57,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:19:57,986 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-15 19:19:58,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:19:58,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:19:58,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:19:58,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:19:58,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:19:58,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:19:58,050 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:19:58,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:19:58,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:19:58,051 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:19:58,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:19:58,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:19:58,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:19:58,053 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:19:58,053 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:19:58,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:19:58,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:19:58,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:19:58,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:19:58,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:19:58,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:19:58,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:19:58,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:19:58,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:19:58,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:19:58,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:19:58,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:19:58,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:19:58,057 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_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-10-15 19:19:58,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:19:58,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:19:58,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:19:58,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:19:58,414 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:19:58,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-15 19:19:58,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/a0ce463cc/2fd3431ff0d344f6a462fbc5198960fc/FLAG4a14c9912 [2021-10-15 19:19:59,191 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:19:59,194 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-15 19:19:59,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/a0ce463cc/2fd3431ff0d344f6a462fbc5198960fc/FLAG4a14c9912 [2021-10-15 19:19:59,531 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/a0ce463cc/2fd3431ff0d344f6a462fbc5198960fc [2021-10-15 19:19:59,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:19:59,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:19:59,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:59,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:19:59,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:19:59,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:59" (1/1) ... [2021-10-15 19:19:59,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283b717d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:59, skipping insertion in model container [2021-10-15 19:19:59,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:59" (1/1) ... [2021-10-15 19:19:59,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:19:59,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:19:59,768 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_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-15 19:19:59,787 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:19:59,790 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:19:59,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:59,828 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) [2021-10-15 19:19:59,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cd82765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:59, skipping insertion in model container [2021-10-15 19:19:59,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:59,830 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-15 19:19:59,833 INFO L168 Benchmark]: Toolchain (without parser) took 293.42 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 69.6 MB in the beginning and 104.3 MB in the end (delta: -34.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:59,834 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 98.6 MB. Free memory was 53.5 MB in the beginning and 53.5 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:59,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.93 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 69.4 MB in the beginning and 104.3 MB in the end (delta: -34.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:59,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 98.6 MB. Free memory was 53.5 MB in the beginning and 53.5 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.93 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 69.4 MB in the beginning and 104.3 MB in the end (delta: -34.9 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-5709675 [2021-10-15 19:20:02,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:20:02,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:20:02,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:20:02,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:20:02,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:20:02,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:20:02,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:20:02,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:20:02,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:20:02,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:20:02,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:20:02,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:20:02,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:20:02,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:20:02,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:20:02,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:20:02,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:20:02,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:20:02,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:20:02,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:20:02,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:20:02,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:20:02,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:20:02,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:20:02,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:20:02,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:20:02,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:20:02,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:20:02,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:20:02,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:20:02,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:20:02,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:20:02,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:20:02,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:20:02,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:20:02,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:20:02,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:20:02,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:20:02,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:20:02,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:20:02,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-10-15 19:20:02,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:20:02,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:20:02,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:20:02,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:20:02,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:20:02,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:20:02,567 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:20:02,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:20:02,568 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:20:02,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:20:02,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:20:02,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:20:02,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:20:02,570 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:20:02,570 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:20:02,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:20:02,570 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:20:02,571 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:20:02,571 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:20:02,571 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:20:02,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:20:02,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:20:02,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:20:02,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:20:02,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:02,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:20:02,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:20:02,574 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:20:02,574 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:20:02,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:20:02,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:20:02,575 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_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c80ebc24229a709692e92e1e7cb6c93b163ba [2021-10-15 19:20:02,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:20:03,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:20:03,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:20:03,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:20:03,036 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:20:03,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-15 19:20:03,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/2c4f0aa9d/3418d406b51042b6af2f0bec74550df3/FLAG539b3ac03 [2021-10-15 19:20:03,751 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:20:03,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-15 19:20:03,765 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/2c4f0aa9d/3418d406b51042b6af2f0bec74550df3/FLAG539b3ac03 [2021-10-15 19:20:04,102 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/data/2c4f0aa9d/3418d406b51042b6af2f0bec74550df3 [2021-10-15 19:20:04,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:20:04,106 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:20:04,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:04,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:20:04,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:20:04,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138f7867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04, skipping insertion in model container [2021-10-15 19:20:04,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:20:04,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:20:04,306 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_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-15 19:20:04,325 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:20:04,334 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:20:04,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:04,403 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-15 19:20:04,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:20:04,436 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_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-15 19:20:04,447 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:20:04,454 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:20:04,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:04,501 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:20:04,519 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_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-15 19:20:04,541 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:20:04,545 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-15 19:20:04,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:20:04,592 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:20:04,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04 WrapperNode [2021-10-15 19:20:04,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:20:04,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:20:04,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:20:04,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:20:04,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:20:04,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:20:04,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:20:04,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:20:04,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (1/1) ... [2021-10-15 19:20:04,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:20:04,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:20:04,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:20:04,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:20:04,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:20:04,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:20:04,825 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-10-15 19:20:04,825 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 19:20:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-15 19:20:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-15 19:20:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-15 19:20:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-15 19:20:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-15 19:20:04,826 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-15 19:20:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-10-15 19:20:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:20:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-15 19:20:04,827 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:20:04,827 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:20:04,828 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:20:04,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:20:04,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-10-15 19:20:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-10-15 19:20:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:20:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 19:20:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 19:20:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:20:04,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-15 19:20:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-15 19:20:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:20:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-15 19:20:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:20:04,830 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-15 19:20:04,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 19:20:04,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:20:04,831 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-15 19:20:04,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:20:04,831 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-15 19:20:04,832 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-15 19:20:04,832 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-10-15 19:20:04,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-15 19:20:04,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:20:04,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:20:04,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:20:04,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:20:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-15 19:20:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-15 19:20:05,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:20:05,967 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-15 19:20:05,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:05 BoogieIcfgContainer [2021-10-15 19:20:05,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:20:05,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:20:05,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:20:05,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:20:05,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:20:04" (1/3) ... [2021-10-15 19:20:05,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac4b9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:05, skipping insertion in model container [2021-10-15 19:20:05,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:20:04" (2/3) ... [2021-10-15 19:20:05,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac4b9ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:20:05, skipping insertion in model container [2021-10-15 19:20:05,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:05" (3/3) ... [2021-10-15 19:20:05,980 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-15 19:20:05,986 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:20:05,987 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-15 19:20:06,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:20:06,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:20:06,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-15 19:20:06,077 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) [2021-10-15 19:20:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 19:20:06,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:06,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:06,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-10-15 19:20:06,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:06,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061429126] [2021-10-15 19:20:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:06,110 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:06,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:06,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:06,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:20:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:20:06,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:06,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:20:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:06,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:06,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:06,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061429126] [2021-10-15 19:20:06,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061429126] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:06,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:06,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 19:20:06,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980830642] [2021-10-15 19:20:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:20:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:20:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:20:06,435 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) [2021-10-15 19:20:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:06,812 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-10-15 19:20:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:06,815 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 [2021-10-15 19:20:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:06,827 INFO L225 Difference]: With dead ends: 186 [2021-10-15 19:20:06,827 INFO L226 Difference]: Without dead ends: 182 [2021-10-15 19:20:06,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:20:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-15 19:20:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-10-15 19:20:06,883 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) [2021-10-15 19:20:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-10-15 19:20:06,890 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-10-15 19:20:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:06,891 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-10-15 19:20:06,891 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) [2021-10-15 19:20:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-10-15 19:20:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-15 19:20:06,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:06,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:06,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:07,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:07,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-10-15 19:20:07,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:07,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319616152] [2021-10-15 19:20:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:07,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:07,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:07,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:20:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:07,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:20:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:07,282 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 [2021-10-15 19:20:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:07,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:07,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319616152] [2021-10-15 19:20:07,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319616152] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:07,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:07,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-15 19:20:07,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082297772] [2021-10-15 19:20:07,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:20:07,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:20:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:07,425 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) [2021-10-15 19:20:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:08,124 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-10-15 19:20:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:20:08,127 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 [2021-10-15 19:20:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:08,130 INFO L225 Difference]: With dead ends: 179 [2021-10-15 19:20:08,130 INFO L226 Difference]: Without dead ends: 179 [2021-10-15 19:20:08,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:20:08,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-15 19:20:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-10-15 19:20:08,148 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) [2021-10-15 19:20:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-10-15 19:20:08,152 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-10-15 19:20:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:08,153 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-10-15 19:20:08,153 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) [2021-10-15 19:20:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-10-15 19:20:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 19:20:08,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:08,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:08,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:08,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:08,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-10-15 19:20:08,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:08,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960321513] [2021-10-15 19:20:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:08,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:08,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:08,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:20:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:20:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:08,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:08,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:08,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960321513] [2021-10-15 19:20:08,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960321513] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:08,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:08,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-15 19:20:08,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581652439] [2021-10-15 19:20:08,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:20:08,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:20:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:20:08,924 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) [2021-10-15 19:20:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:09,136 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-10-15 19:20:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:20:09,138 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 [2021-10-15 19:20:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:09,141 INFO L225 Difference]: With dead ends: 244 [2021-10-15 19:20:09,141 INFO L226 Difference]: Without dead ends: 244 [2021-10-15 19:20:09,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:20:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-15 19:20:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-10-15 19:20:09,162 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) [2021-10-15 19:20:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-10-15 19:20:09,166 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-10-15 19:20:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:09,166 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-10-15 19:20:09,166 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) [2021-10-15 19:20:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-10-15 19:20:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 19:20:09,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:09,168 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:09,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:09,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:09,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-10-15 19:20:09,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:09,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330973091] [2021-10-15 19:20:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:09,391 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:09,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:09,392 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:09,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:20:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:20:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:09,544 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 [2021-10-15 19:20:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:09,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:09,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:09,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330973091] [2021-10-15 19:20:09,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330973091] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:09,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:09,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:20:09,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343557685] [2021-10-15 19:20:09,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:20:09,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:09,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:20:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:20:09,730 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) [2021-10-15 19:20:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:10,644 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-10-15 19:20:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:10,648 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 [2021-10-15 19:20:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:10,651 INFO L225 Difference]: With dead ends: 225 [2021-10-15 19:20:10,651 INFO L226 Difference]: Without dead ends: 225 [2021-10-15 19:20:10,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-15 19:20:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-10-15 19:20:10,683 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) [2021-10-15 19:20:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2021-10-15 19:20:10,693 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 14 [2021-10-15 19:20:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:10,694 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2021-10-15 19:20:10,694 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) [2021-10-15 19:20:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2021-10-15 19:20:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 19:20:10,695 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:10,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:10,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:10,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:10,909 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-10-15 19:20:10,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:10,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122246740] [2021-10-15 19:20:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:10,912 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:10,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:10,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:20:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:20:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:11,110 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 [2021-10-15 19:20:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:11,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:11,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:11,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122246740] [2021-10-15 19:20:11,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122246740] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:11,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:11,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-15 19:20:11,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952297839] [2021-10-15 19:20:11,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:20:11,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:20:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:11,579 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) [2021-10-15 19:20:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:13,023 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2021-10-15 19:20:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:20:13,028 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 [2021-10-15 19:20:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:13,031 INFO L225 Difference]: With dead ends: 237 [2021-10-15 19:20:13,031 INFO L226 Difference]: Without dead ends: 237 [2021-10-15 19:20:13,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:20:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-15 19:20:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-10-15 19:20:13,055 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) [2021-10-15 19:20:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-10-15 19:20:13,058 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-10-15 19:20:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:13,058 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-10-15 19:20:13,058 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) [2021-10-15 19:20:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-10-15 19:20:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-15 19:20:13,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:13,060 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] [2021-10-15 19:20:13,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-15 19:20:13,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:13,271 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-10-15 19:20:13,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:13,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211562081] [2021-10-15 19:20:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:13,272 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:13,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:13,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:20:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:20:13,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:13,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:20:13,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:13,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211562081] [2021-10-15 19:20:13,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211562081] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:20:13,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:20:13,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-15 19:20:13,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515956759] [2021-10-15 19:20:13,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:20:13,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:13,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:20:13,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:20:13,805 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) [2021-10-15 19:20:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:14,008 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2021-10-15 19:20:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:20:14,009 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 [2021-10-15 19:20:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:14,011 INFO L225 Difference]: With dead ends: 250 [2021-10-15 19:20:14,012 INFO L226 Difference]: Without dead ends: 250 [2021-10-15 19:20:14,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:20:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-15 19:20:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-10-15 19:20:14,025 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) [2021-10-15 19:20:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-10-15 19:20:14,028 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 21 [2021-10-15 19:20:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:14,029 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-10-15 19:20:14,029 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) [2021-10-15 19:20:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-10-15 19:20:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 19:20:14,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:14,031 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] [2021-10-15 19:20:14,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:14,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:14,247 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1907346070, now seen corresponding path program 1 times [2021-10-15 19:20:14,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:14,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535982252] [2021-10-15 19:20:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:14,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:14,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:14,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 19:20:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:20:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:14,589 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 [2021-10-15 19:20:14,595 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 [2021-10-15 19:20:14,993 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:20:14,993 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 [2021-10-15 19:20:15,006 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:20:15,009 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 [2021-10-15 19:20:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:20:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:17,280 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 [2021-10-15 19:20:19,809 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 [2021-10-15 19:20:22,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:22,171 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 [2021-10-15 19:20:22,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:22,202 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 [2021-10-15 19:20:26,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:26,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 122 [2021-10-15 19:20:26,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:20:26,039 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 [2021-10-15 19:20:31,482 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20)))))) (_ bv0 1))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from true [2021-10-15 19:20:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 0 refuted. 4 times theorem prover too weak. 6 trivial. 4 not checked. [2021-10-15 19:20:31,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:31,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535982252] [2021-10-15 19:20:31,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535982252] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:20:31,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:31,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-15 19:20:31,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313169968] [2021-10-15 19:20:31,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:20:31,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:20:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=43, Unknown=3, NotChecked=42, Total=110 [2021-10-15 19:20:31,660 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) [2021-10-15 19:20:33,888 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20))))))))) (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 [2021-10-15 19:20:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:38,395 INFO L93 Difference]: Finished difference Result 239 states and 289 transitions. [2021-10-15 19:20:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:20:38,396 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 [2021-10-15 19:20:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:38,399 INFO L225 Difference]: With dead ends: 239 [2021-10-15 19:20:38,399 INFO L226 Difference]: Without dead ends: 236 [2021-10-15 19:20:38,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 10563.5ms TimeCoverageRelationStatistics Valid=42, Invalid=80, Unknown=4, NotChecked=84, Total=210 [2021-10-15 19:20:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-15 19:20:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-10-15 19:20:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 176 states have internal predecessors, (199), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2021-10-15 19:20:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 280 transitions. [2021-10-15 19:20:38,415 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 280 transitions. Word has length 38 [2021-10-15 19:20:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:38,416 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 280 transitions. [2021-10-15 19:20:38,416 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) [2021-10-15 19:20:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 280 transitions. [2021-10-15 19:20:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 19:20:38,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:38,419 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:38,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-15 19:20:38,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:38,634 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:38,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:38,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1985713246, now seen corresponding path program 1 times [2021-10-15 19:20:38,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:38,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916051314] [2021-10-15 19:20:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:38,636 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:38,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:38,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:38,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 19:20:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:38,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:20:38,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:38,885 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 [2021-10-15 19:20:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:20:39,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:20:41,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:41,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916051314] [2021-10-15 19:20:41,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916051314] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:20:41,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:41,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-15 19:20:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127580594] [2021-10-15 19:20:41,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 19:20:41,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 19:20:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-15 19:20:41,348 INFO L87 Difference]: Start difference. First operand 232 states and 280 transitions. Second operand has 18 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-15 19:20:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:49,657 INFO L93 Difference]: Finished difference Result 262 states and 323 transitions. [2021-10-15 19:20:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:20:49,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 29 [2021-10-15 19:20:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:49,660 INFO L225 Difference]: With dead ends: 262 [2021-10-15 19:20:49,660 INFO L226 Difference]: Without dead ends: 262 [2021-10-15 19:20:49,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1931.4ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-15 19:20:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-15 19:20:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 252. [2021-10-15 19:20:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 141 states have (on average 1.553191489361702) internal successors, (219), 191 states have internal predecessors, (219), 44 states have call successors, (44), 17 states have call predecessors, (44), 17 states have return successors, (47), 43 states have call predecessors, (47), 43 states have call successors, (47) [2021-10-15 19:20:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 310 transitions. [2021-10-15 19:20:49,676 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 310 transitions. Word has length 29 [2021-10-15 19:20:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:49,676 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 310 transitions. [2021-10-15 19:20:49,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-15 19:20:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 310 transitions. [2021-10-15 19:20:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 19:20:49,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:49,678 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:49,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:49,898 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting minErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1985713245, now seen corresponding path program 1 times [2021-10-15 19:20:49,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:49,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699043008] [2021-10-15 19:20:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:49,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:49,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:49,900 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-15 19:20:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:20:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:50,192 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 [2021-10-15 19:20:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:20:50,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:20:50,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:20:50,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699043008] [2021-10-15 19:20:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699043008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:20:50,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:20:50,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-15 19:20:50,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665112658] [2021-10-15 19:20:50,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:20:50,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:20:50,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:20:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:20:50,939 INFO L87 Difference]: Start difference. First operand 252 states and 310 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-15 19:20:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:20:53,793 INFO L93 Difference]: Finished difference Result 271 states and 333 transitions. [2021-10-15 19:20:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:20:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 29 [2021-10-15 19:20:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:20:53,796 INFO L225 Difference]: With dead ends: 271 [2021-10-15 19:20:53,796 INFO L226 Difference]: Without dead ends: 271 [2021-10-15 19:20:53,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-15 19:20:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-15 19:20:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2021-10-15 19:20:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 152 states have (on average 1.519736842105263) internal successors, (231), 200 states have internal predecessors, (231), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-10-15 19:20:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2021-10-15 19:20:53,826 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 29 [2021-10-15 19:20:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:20:53,828 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2021-10-15 19:20:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-15 19:20:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2021-10-15 19:20:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-15 19:20:53,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:20:53,836 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:20:53,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:20:54,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:20:54,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting nondet_treeErr5REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:20:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:20:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1567348108, now seen corresponding path program 1 times [2021-10-15 19:20:54,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:20:54,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051996334] [2021-10-15 19:20:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:20:54,050 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:20:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:20:54,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:20:54,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-15 19:20:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:20:54,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:20:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:20:54,371 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 [2021-10-15 19:20:54,377 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 [2021-10-15 19:20:54,737 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:20:54,738 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 [2021-10-15 19:20:54,755 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:20:54,755 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 [2021-10-15 19:20:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:20:54,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:20:59,720 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_17 (_ BitVec 32))) (or (let ((.cse0 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv12 32)))) (and (bvule .cse0 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_17)) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv8 32)) .cse0))) (exists ((v_nondet_tree_~n~0.base_33 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_33)))) (let ((.cse1 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv12 32)))) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv8 32)) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_33 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_17))))))))) is different from false [2021-10-15 19:21:01,735 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_17 (_ BitVec 32))) (or (let ((.cse0 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv12 32)))) (and (bvule .cse0 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_17)) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv8 32)) .cse0))) (exists ((v_nondet_tree_~n~0.base_33 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_33)))) (let ((.cse1 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv12 32)))) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv8 32)) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_33 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_17))))))))) is different from true [2021-10-15 19:21:03,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:21:03,334 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 [2021-10-15 19:21:03,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:21:03,359 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 [2021-10-15 19:21:06,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:21:06,891 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 114 treesize of output 118 [2021-10-15 19:21:06,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:21:06,912 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 [2021-10-15 19:21:11,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_17 (_ BitVec 32)) (v_nondet_tree_~n~0.base_34 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_34))) (let ((.cse0 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv12 32)))) (and (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv8 32)) .cse0) (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_34 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_17)))) (exists ((v_nondet_tree_~n~0.base_33 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_33)))) (let ((.cse1 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv12 32)))) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_11 (_ bv8 32)) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_33 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_17))))))))) is different from false [2021-10-15 19:21:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 4 times theorem prover too weak. 3 trivial. 10 not checked. [2021-10-15 19:21:22,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:21:22,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051996334] [2021-10-15 19:21:22,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051996334] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:21:22,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:21:22,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-10-15 19:21:22,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354768203] [2021-10-15 19:21:22,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:21:22,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:21:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:21:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=67, Unknown=4, NotChecked=34, Total=132 [2021-10-15 19:21:22,307 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-15 19:21:32,649 WARN L207 SmtUtils]: Spent 6.12 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-15 19:22:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:22:07,126 INFO L93 Difference]: Finished difference Result 268 states and 331 transitions. [2021-10-15 19:22:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:22:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 34 [2021-10-15 19:22:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:22:07,129 INFO L225 Difference]: With dead ends: 268 [2021-10-15 19:22:07,129 INFO L226 Difference]: Without dead ends: 268 [2021-10-15 19:22:07,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 33582.7ms TimeCoverageRelationStatistics Valid=56, Invalid=128, Unknown=6, NotChecked=50, Total=240 [2021-10-15 19:22:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-15 19:22:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 265. [2021-10-15 19:22:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 153 states have (on average 1.5163398692810457) internal successors, (232), 200 states have internal predecessors, (232), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (49), 46 states have call predecessors, (49), 45 states have call successors, (49) [2021-10-15 19:22:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 327 transitions. [2021-10-15 19:22:07,142 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 327 transitions. Word has length 34 [2021-10-15 19:22:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:22:07,143 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 327 transitions. [2021-10-15 19:22:07,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-15 19:22:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 327 transitions. [2021-10-15 19:22:07,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 19:22:07,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:22:07,145 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 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] [2021-10-15 19:22:07,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:07,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:22:07,356 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:22:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -347515287, now seen corresponding path program 1 times [2021-10-15 19:22:07,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:22:07,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032731238] [2021-10-15 19:22:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:07,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:22:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:22:07,358 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:22:07,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-15 19:22:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 19:22:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:22:07,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:22:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:22:08,103 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:22:08,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032731238] [2021-10-15 19:22:08,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032731238] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:08,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:08,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 10 [2021-10-15 19:22:08,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482643277] [2021-10-15 19:22:08,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:22:08,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:22:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:22:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:22:08,105 INFO L87 Difference]: Start difference. First operand 265 states and 327 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-15 19:22:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:22:08,609 INFO L93 Difference]: Finished difference Result 286 states and 337 transitions. [2021-10-15 19:22:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:22:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-10-15 19:22:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:22:08,612 INFO L225 Difference]: With dead ends: 286 [2021-10-15 19:22:08,612 INFO L226 Difference]: Without dead ends: 282 [2021-10-15 19:22:08,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:22:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-10-15 19:22:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 265. [2021-10-15 19:22:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 200 states have internal predecessors, (230), 46 states have call successors, (46), 18 states have call predecessors, (46), 18 states have return successors, (49), 46 states have call predecessors, (49), 45 states have call successors, (49) [2021-10-15 19:22:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 325 transitions. [2021-10-15 19:22:08,633 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 325 transitions. Word has length 35 [2021-10-15 19:22:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:22:08,634 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 325 transitions. [2021-10-15 19:22:08,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-15 19:22:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 325 transitions. [2021-10-15 19:22:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 19:22:08,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:22:08,637 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2021-10-15 19:22:08,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:08,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:22:08,849 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:22:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2044914527, now seen corresponding path program 1 times [2021-10-15 19:22:08,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:22:08,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932654665] [2021-10-15 19:22:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:08,850 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:22:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:22:08,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:22:08,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-15 19:22:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 19:22:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:09,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-10-15 19:22:09,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-10-15 19:22:09,495 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-15 19:22:09,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2021-10-15 19:22:09,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 19:22:09,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-15 19:22:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-15 19:22:09,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-15 19:22:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:22:10,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:22:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:22:13,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:22:13,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932654665] [2021-10-15 19:22:13,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932654665] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-15 19:22:13,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:22:13,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-15 19:22:13,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322611371] [2021-10-15 19:22:13,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:22:13,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:22:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:22:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=209, Unknown=1, NotChecked=0, Total=240 [2021-10-15 19:22:13,170 INFO L87 Difference]: Start difference. First operand 265 states and 325 transitions. Second operand has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-15 19:22:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:22:16,991 INFO L93 Difference]: Finished difference Result 307 states and 388 transitions. [2021-10-15 19:22:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:22:16,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-10-15 19:22:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:22:16,994 INFO L225 Difference]: With dead ends: 307 [2021-10-15 19:22:16,994 INFO L226 Difference]: Without dead ends: 307 [2021-10-15 19:22:16,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3108.7ms TimeCoverageRelationStatistics Valid=94, Invalid=607, Unknown=1, NotChecked=0, Total=702 [2021-10-15 19:22:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-15 19:22:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-10-15 19:22:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 156 states have (on average 1.4935897435897436) internal successors, (233), 203 states have internal predecessors, (233), 46 states have call successors, (46), 19 states have call predecessors, (46), 19 states have return successors, (49), 46 states have call predecessors, (49), 45 states have call successors, (49) [2021-10-15 19:22:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 328 transitions. [2021-10-15 19:22:17,009 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 328 transitions. Word has length 35 [2021-10-15 19:22:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:22:17,009 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 328 transitions. [2021-10-15 19:22:17,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-15 19:22:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 328 transitions. [2021-10-15 19:22:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-15 19:22:17,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:22:17,011 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:17,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:22:17,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:22:17,224 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting nondet_treeErr5REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-15 19:22:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:17,225 INFO L82 PathProgramCache]: Analyzing trace with hash -98511648, now seen corresponding path program 2 times [2021-10-15 19:22:17,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:22:17,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716644666] [2021-10-15 19:22:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:22:17,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:22:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:22:17,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:22:17,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-15 19:22:17,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:22:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:22:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:22:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:17,881 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 [2021-10-15 19:22:17,889 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 [2021-10-15 19:22:18,528 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-15 19:22:18,528 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 2 case distinctions, treesize of input 31 treesize of output 35 [2021-10-15 19:22:18,546 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:22:18,547 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 32 treesize of output 32 [2021-10-15 19:22:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-15 19:22:18,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:22:39,259 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_27 (_ BitVec 32)) (v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ BitVec 32))) (or (exists ((v_nondet_tree_~n~0.base_52 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_52))) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)))) (exists ((v_nondet_tree_~n~0.base_53 (_ BitVec 32))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)) (select (store (store |c_old(#length)| v_nondet_tree_~n~0.base_52 (_ bv12 32)) v_nondet_tree_~n~0.base_53 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_27))))))) (and (forall ((v_nondet_tree_~n~0.base_56 (_ BitVec 32))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)) (select (store |c_#length| v_nondet_tree_~n~0.base_56 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_27))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)))))) is different from false [2021-10-15 19:22:41,262 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_27 (_ BitVec 32)) (v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ BitVec 32))) (or (exists ((v_nondet_tree_~n~0.base_52 (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_52))) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)))) (exists ((v_nondet_tree_~n~0.base_53 (_ BitVec 32))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)) (select (store (store |c_old(#length)| v_nondet_tree_~n~0.base_52 (_ bv12 32)) v_nondet_tree_~n~0.base_53 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_27))))))) (and (forall ((v_nondet_tree_~n~0.base_56 (_ BitVec 32))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)) (select (store |c_#length| v_nondet_tree_~n~0.base_56 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_27))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_17 (_ bv12 32)))))) is different from true [2021-10-15 19:22:41,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:22:41,669 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 179 treesize of output 183 [2021-10-15 19:22:41,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:22:41,694 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 183 treesize of output 187 [2021-10-15 19:22:44,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:22:44,098 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 180 treesize of output 184 [2021-10-15 19:22:44,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:22:44,153 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 184 treesize of output 188 [2021-10-15 19:22:47,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:22:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716644666] [2021-10-15 19:22:47,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_nondet_tree_~n~0.base_53 [2021-10-15 19:22:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [939221902] [2021-10-15 19:22:47,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:22:47,300 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-15 19:22:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/cvc4 [2021-10-15 19:22:47,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-15 19:22:47,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-15 19:22:47,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:22:47,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:22:47,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:22:47,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:22:47,972 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 [2021-10-15 19:22:47,978 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 [2021-10-15 19:22:48,472 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-15 19:22:48,472 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 2 case distinctions, treesize of input 32 treesize of output 36 [2021-10-15 19:22:48,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:22:48,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-10-15 19:22:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-15 19:22:48,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:23:13,788 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_30 (_ BitVec 32))) (or (exists ((v_nondet_tree_~n~0.base_52 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_52)) (or (exists ((v_nondet_tree_~n~0.base_53 (_ BitVec 32))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ bv12 32)) (select (store (store |c_old(#length)| v_nondet_tree_~n~0.base_52 (_ bv12 32)) v_nondet_tree_~n~0.base_53 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_30)))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ bv12 32))))))) (and (forall ((v_nondet_tree_~n~0.base_71 (_ BitVec 32))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ bv12 32)) (select (store |c_#length| v_nondet_tree_~n~0.base_71 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_30))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_20 (_ bv12 32)))))) is different from false [2021-10-15 19:23:14,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:23:14,282 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 175 treesize of output 179 [2021-10-15 19:23:14,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:23:14,319 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 179 treesize of output 183 [2021-10-15 19:23:18,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_nondet_tree_~n~0.base_71 [2021-10-15 19:23:18,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067639925] [2021-10-15 19:23:18,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:23:18,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:23:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:23:18,281 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:23:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:23:18,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:23:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:23:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:23:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:23:18,892 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 [2021-10-15 19:23:19,562 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-15 19:23:19,562 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 2 case distinctions, treesize of input 29 treesize of output 33 [2021-10-15 19:23:19,583 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:23:19,583 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 30 treesize of output 30 [2021-10-15 19:23:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-15 19:23:19,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:23:26,739 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_33 (_ BitVec 32))) (or (exists ((v_nondet_tree_~n~0.base_52 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_52)) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)))) (exists ((v_nondet_tree_~n~0.base_53 (_ BitVec 32))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)) (select (store (store |c_old(#length)| v_nondet_tree_~n~0.base_52 (_ bv12 32)) v_nondet_tree_~n~0.base_53 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_33))))))) (let ((.cse0 (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)))) (and (bvule .cse0 (select |c_#length| v_nondet_tree_~n~0.base_BEFORE_CALL_33)) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv8 32)) .cse0))))) is different from false [2021-10-15 19:23:30,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_33 (_ BitVec 32))) (or (and (forall ((v_nondet_tree_~n~0.base_85 (_ BitVec 32))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)) (select (store |c_#length| v_nondet_tree_~n~0.base_85 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_33))) (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)))) (exists ((v_nondet_tree_~n~0.base_52 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_52)) (or (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv8 32)) (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)))) (exists ((v_nondet_tree_~n~0.base_53 (_ BitVec 32))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_BEFORE_CALL_23 (_ bv12 32)) (select (store (store |c_old(#length)| v_nondet_tree_~n~0.base_52 (_ bv12 32)) v_nondet_tree_~n~0.base_53 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_33))))))))) is different from false [2021-10-15 19:23:31,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:23:31,770 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 175 treesize of output 179 [2021-10-15 19:23:31,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 19:23:31,804 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 179 treesize of output 183 [2021-10-15 19:23:36,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_nondet_tree_~n~0.base_85 [2021-10-15 19:23:36,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:36,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-15 19:23:36,999 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-15 19:23:36,999 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-15 19:23:37,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-15 19:23:37,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:23:37,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr0REQUIRES_VIOLATION [2021-10-15 19:23:37,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr1REQUIRES_VIOLATION [2021-10-15 19:23:37,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr2REQUIRES_VIOLATION [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr3REQUIRES_VIOLATION [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr4REQUIRES_VIOLATION [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr5REQUIRES_VIOLATION [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr6REQUIRES_VIOLATION [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr7REQUIRES_VIOLATION [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr11REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr12REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr13REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_delErr14REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr0REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr1REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr2REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr3REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr4REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location minErr5REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-15 19:23:37,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-15 19:23:37,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-15 19:23:37,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr0REQUIRES_VIOLATION [2021-10-15 19:23:37,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr1REQUIRES_VIOLATION [2021-10-15 19:23:37,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr2REQUIRES_VIOLATION [2021-10-15 19:23:37,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr3REQUIRES_VIOLATION [2021-10-15 19:23:37,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr4REQUIRES_VIOLATION [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr5REQUIRES_VIOLATION [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr6REQUIRES_VIOLATION [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr7REQUIRES_VIOLATION [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:23:37,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr0REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr1REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr2REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sizeErr3REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-15 19:23:37,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-15 19:23:37,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-15 19:23:37,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:37,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:23:37,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-15 19:23:37,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:23:37,618 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:23:37,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:23:37 BoogieIcfgContainer [2021-10-15 19:23:37,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:23:37,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:23:37,632 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:23:37,632 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:23:37,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:20:05" (3/4) ... [2021-10-15 19:23:37,643 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:23:37,643 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:23:37,644 INFO L168 Benchmark]: Toolchain (without parser) took 213537.08 ms. Allocated memory was 79.7 MB in the beginning and 98.6 MB in the end (delta: 18.9 MB). Free memory was 57.7 MB in the beginning and 28.3 MB in the end (delta: 29.4 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:37,644 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 50.3 MB. Free memory was 30.4 MB in the beginning and 30.3 MB in the end (delta: 40.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:37,644 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.70 ms. Allocated memory is still 79.7 MB. Free memory was 57.6 MB in the beginning and 60.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:37,645 INFO L168 Benchmark]: Boogie Preprocessor took 94.20 ms. Allocated memory is still 79.7 MB. Free memory was 60.2 MB in the beginning and 57.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:37,646 INFO L168 Benchmark]: RCFGBuilder took 1281.12 ms. Allocated memory is still 79.7 MB. Free memory was 57.6 MB in the beginning and 52.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:37,647 INFO L168 Benchmark]: TraceAbstraction took 211659.17 ms. Allocated memory was 79.7 MB in the beginning and 98.6 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 28.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:23:37,647 INFO L168 Benchmark]: Witness Printer took 11.49 ms. Allocated memory is still 98.6 MB. Free memory is still 28.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:23:37,649 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 50.3 MB. Free memory was 30.4 MB in the beginning and 30.3 MB in the end (delta: 40.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 484.70 ms. Allocated memory is still 79.7 MB. Free memory was 57.6 MB in the beginning and 60.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 94.20 ms. Allocated memory is still 79.7 MB. Free memory was 60.2 MB in the beginning and 57.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1281.12 ms. Allocated memory is still 79.7 MB. Free memory was 57.6 MB in the beginning and 52.9 MB in the end (delta: 4.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 211659.17 ms. Allocated memory was 79.7 MB in the beginning and 98.6 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 28.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 49.6 MB. Max. memory is 16.1 GB. * Witness Printer took 11.49 ms. Allocated memory is still 98.6 MB. Free memory is still 28.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 31]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L102] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() - UnprovableResult [Line: 101]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 52]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 52]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 56]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 42]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 42]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 85]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 88]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 96]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 97]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 98]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 74]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 16]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 66]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 67]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 67]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 188 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 211575.4ms, OverallIterations: 13, TraceHistogramMax: 6, EmptinessCheckTime: 36.1ms, AutomataDifference: 70995.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2164 SDtfs, 1478 SDslu, 8340 SDs, 0 SdLazy, 6600 SolverSat, 546 SolverUnsat, 48 SolverUnknown, 0 SolverNotchecked, 44973.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 596 GetRequests, 452 SyntacticMatches, 13 SemanticMatches, 131 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 50270.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269occurred in iteration=12, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 281.3ms AutomataMinimizationTime, 12 MinimizatonAttempts, 123 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 158.1ms SsaConstructionTime, 779.2ms SatisfiabilityAnalysisTime, 54663.4ms InterpolantComputationTime, 280 NumberOfCodeBlocks, 280 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 536 ConstructedInterpolants, 77 QuantifiedInterpolants, 4667 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1617 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 24 InterpolantComputations, 14 PerfectInterpolantSequences, 137/222 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 19:23:37,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7aadc01-70a8-4c2b-90f9-cf8068fdcdd9/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...