./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:51:12,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:51:12,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:51:12,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:51:12,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:51:12,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:51:12,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:51:12,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:51:12,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:51:12,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:51:12,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:51:12,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:51:12,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:51:12,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:51:12,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:51:12,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:51:12,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:51:12,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:51:12,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:51:12,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:51:12,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:51:12,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:51:12,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:51:12,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:51:12,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:51:12,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:51:12,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:51:12,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:51:12,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:51:12,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:51:12,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:51:12,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:51:12,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:51:12,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:51:12,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:51:12,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:51:12,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:51:12,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:51:12,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:51:12,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:51:12,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:51:12,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-28 22:51:12,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:51:12,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:51:12,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:51:12,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:51:12,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:51:12,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:51:12,373 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:51:12,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:51:12,373 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:51:12,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:51:12,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:51:12,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:51:12,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:51:12,376 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:51:12,376 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:51:12,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:51:12,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:51:12,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:51:12,377 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:51:12,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:51:12,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:51:12,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:51:12,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:12,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:51:12,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:51:12,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:51:12,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:51:12,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:51:12,380 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_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-28 22:51:12,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:51:12,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:51:12,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:51:12,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:51:12,813 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:51:12,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 22:51:12,921 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/087537430/a818b2697f8346e59908ff9db9cb4139/FLAG396f84f01 [2021-10-28 22:51:13,597 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:51:13,598 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 22:51:13,612 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/087537430/a818b2697f8346e59908ff9db9cb4139/FLAG396f84f01 [2021-10-28 22:51:13,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/087537430/a818b2697f8346e59908ff9db9cb4139 [2021-10-28 22:51:13,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:51:13,918 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:51:13,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:13,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:51:13,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:51:13,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:13" (1/1) ... [2021-10-28 22:51:13,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e266479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:13, skipping insertion in model container [2021-10-28 22:51:13,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:13" (1/1) ... [2021-10-28 22:51:13,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:51:13,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:14,216 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 22:51:14,245 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:14,248 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:14,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:14,320 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-28 22:51:14,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@521807bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:14, skipping insertion in model container [2021-10-28 22:51:14,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:14,322 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-10-28 22:51:14,326 INFO L168 Benchmark]: Toolchain (without parser) took 405.17 ms. Allocated memory is still 98.6 MB. Free memory was 62.6 MB in the beginning and 73.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:14,329 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 74.6 MB in the end (delta: 27.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:51:14,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.70 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 73.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:51:14,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory was 74.7 MB in the beginning and 74.6 MB in the end (delta: 27.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 398.70 ms. Allocated memory is still 98.6 MB. Free memory was 62.4 MB in the beginning and 73.8 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:51:16,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:51:16,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:51:17,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:51:17,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:51:17,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:51:17,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:51:17,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:51:17,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:51:17,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:51:17,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:51:17,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:51:17,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:51:17,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:51:17,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:51:17,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:51:17,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:51:17,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:51:17,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:51:17,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:51:17,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:51:17,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:51:17,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:51:17,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:51:17,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:51:17,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:51:17,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:51:17,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:51:17,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:51:17,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:51:17,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:51:17,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:51:17,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:51:17,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:51:17,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:51:17,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:51:17,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:51:17,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:51:17,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:51:17,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:51:17,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:51:17,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-10-28 22:51:17,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:51:17,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:51:17,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:51:17,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:51:17,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:51:17,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:51:17,144 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:51:17,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:51:17,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:51:17,145 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:51:17,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:51:17,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:51:17,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:51:17,146 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:51:17,146 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:51:17,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:51:17,147 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:51:17,147 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 22:51:17,147 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 22:51:17,147 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:51:17,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:51:17,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:51:17,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:51:17,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:51:17,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:17,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:51:17,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:51:17,150 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 22:51:17,150 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 22:51:17,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:51:17,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 22:51:17,151 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_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-10-28 22:51:17,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:51:17,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:51:17,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:51:17,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:51:17,621 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:51:17,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 22:51:17,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/a0792ae7c/53f16e392e72449fb0a3f01330236296/FLAGbed4089e1 [2021-10-28 22:51:18,323 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:51:18,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-10-28 22:51:18,334 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/a0792ae7c/53f16e392e72449fb0a3f01330236296/FLAGbed4089e1 [2021-10-28 22:51:18,620 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/data/a0792ae7c/53f16e392e72449fb0a3f01330236296 [2021-10-28 22:51:18,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:51:18,632 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:51:18,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:18,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:51:18,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:51:18,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:18" (1/1) ... [2021-10-28 22:51:18,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150cdfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:18, skipping insertion in model container [2021-10-28 22:51:18,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:51:18" (1/1) ... [2021-10-28 22:51:18,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:51:18,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:18,829 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_8e7bc77b-20b5-43ff-8845-46cb346e49a4/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 22:51:18,846 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:18,850 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:18,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:18,911 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-28 22:51:18,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:51:18,922 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_8e7bc77b-20b5-43ff-8845-46cb346e49a4/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 22:51:18,930 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:18,946 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:18,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:18,975 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:51:19,025 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_8e7bc77b-20b5-43ff-8845-46cb346e49a4/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-10-28 22:51:19,032 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:19,038 WARN L1513 CHandler]: Possible shadowing of function min [2021-10-28 22:51:19,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:51:19,104 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:51:19,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19 WrapperNode [2021-10-28 22:51:19,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:51:19,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:51:19,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:51:19,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:51:19,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:51:19,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:51:19,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:51:19,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:51:19,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (1/1) ... [2021-10-28 22:51:19,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:51:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:51:19,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:51:19,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:51:19,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:51:19,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:51:19,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-10-28 22:51:19,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:51:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-28 22:51:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-28 22:51:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-28 22:51:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-10-28 22:51:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-28 22:51:19,264 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-28 22:51:19,264 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-10-28 22:51:19,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:51:19,264 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-28 22:51:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:51:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:51:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:51:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 22:51:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-10-28 22:51:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-10-28 22:51:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:51:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:51:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:51:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:51:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-28 22:51:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-28 22:51:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:51:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 22:51:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:51:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-28 22:51:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 22:51:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:51:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-10-28 22:51:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:51:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-28 22:51:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-28 22:51:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-10-28 22:51:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-28 22:51:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:51:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:51:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 22:51:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:51:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 22:51:19,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 22:51:20,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:51:20,430 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 22:51:20,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:20 BoogieIcfgContainer [2021-10-28 22:51:20,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:51:20,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:51:20,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:51:20,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:51:20,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:51:18" (1/3) ... [2021-10-28 22:51:20,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577353c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:20, skipping insertion in model container [2021-10-28 22:51:20,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:51:19" (2/3) ... [2021-10-28 22:51:20,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@577353c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:51:20, skipping insertion in model container [2021-10-28 22:51:20,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:20" (3/3) ... [2021-10-28 22:51:20,442 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-10-28 22:51:20,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:51:20,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-28 22:51:20,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:51:20,511 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:51:20,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-28 22:51:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 92 states have (on average 1.7391304347826086) internal successors, (160), 147 states have internal predecessors, (160), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-10-28 22:51:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 22:51:20,543 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:20,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:20,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-10-28 22:51:20,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:20,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571287039] [2021-10-28 22:51:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:20,573 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:20,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:20,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 22:51:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 22:51:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:20,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:20,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:20,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:20,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571287039] [2021-10-28 22:51:20,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571287039] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:20,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:20,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 22:51:20,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149748852] [2021-10-28 22:51:20,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 22:51:20,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:21,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 22:51:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 22:51:21,013 INFO L87 Difference]: Start difference. First operand has 185 states, 92 states have (on average 1.7391304347826086) internal successors, (160), 147 states have internal predecessors, (160), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:21,430 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-10-28 22:51:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 22:51:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 22:51:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:21,458 INFO L225 Difference]: With dead ends: 186 [2021-10-28 22:51:21,458 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 22:51:21,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 22:51:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 22:51:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-10-28 22:51:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 143 states have internal predecessors, (151), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-10-28 22:51:21,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-10-28 22:51:21,572 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-10-28 22:51:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-10-28 22:51:21,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-10-28 22:51:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 22:51:21,576 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:21,576 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:21,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:21,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:21,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-10-28 22:51:21,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:21,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800361374] [2021-10-28 22:51:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:21,803 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:21,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:21,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:21,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 22:51:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:51:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:21,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:21,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:22,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:22,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800361374] [2021-10-28 22:51:22,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800361374] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:22,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:22,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 22:51:22,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951020309] [2021-10-28 22:51:22,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:51:22,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:51:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:22,098 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:22,816 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-10-28 22:51:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 22:51:22,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 22:51:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:22,820 INFO L225 Difference]: With dead ends: 179 [2021-10-28 22:51:22,820 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 22:51:22,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:51:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 22:51:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-10-28 22:51:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 142 states have internal predecessors, (150), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-10-28 22:51:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-10-28 22:51:22,848 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-10-28 22:51:22,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:22,849 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-10-28 22:51:22,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:51:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-10-28 22:51:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:51:22,851 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:22,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:22,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:23,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:23,065 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-10-28 22:51:23,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:23,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885707132] [2021-10-28 22:51:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:23,067 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:23,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:23,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 22:51:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:23,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:51:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:23,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:23,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:23,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885707132] [2021-10-28 22:51:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885707132] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:23,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-28 22:51:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799563733] [2021-10-28 22:51:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:51:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:51:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:51:23,599 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 22:51:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:23,793 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-10-28 22:51:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:51:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-10-28 22:51:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:23,798 INFO L225 Difference]: With dead ends: 244 [2021-10-28 22:51:23,798 INFO L226 Difference]: Without dead ends: 244 [2021-10-28 22:51:23,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-28 22:51:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-10-28 22:51:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 121 states have (on average 1.6198347107438016) internal successors, (196), 174 states have internal predecessors, (196), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-10-28 22:51:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-10-28 22:51:23,821 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-10-28 22:51:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:23,822 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-10-28 22:51:23,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 22:51:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-10-28 22:51:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:51:23,824 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:23,824 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:23,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:24,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:24,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-10-28 22:51:24,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:24,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512959932] [2021-10-28 22:51:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:24,042 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:24,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:24,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:24,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 22:51:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:51:24,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:24,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:24,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:24,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:24,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512959932] [2021-10-28 22:51:24,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512959932] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:24,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:24,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 22:51:24,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168839277] [2021-10-28 22:51:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:51:24,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:51:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:51:24,452 INFO L87 Difference]: Start difference. First operand 227 states and 278 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:51:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:25,365 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-10-28 22:51:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:25,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 14 [2021-10-28 22:51:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:25,374 INFO L225 Difference]: With dead ends: 225 [2021-10-28 22:51:25,374 INFO L226 Difference]: Without dead ends: 225 [2021-10-28 22:51:25,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-10-28 22:51:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-10-28 22:51:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 121 states have (on average 1.603305785123967) internal successors, (194), 172 states have internal predecessors, (194), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-10-28 22:51:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2021-10-28 22:51:25,406 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 14 [2021-10-28 22:51:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:25,407 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2021-10-28 22:51:25,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:51:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2021-10-28 22:51:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:51:25,409 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:25,409 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:25,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-28 22:51:25,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:25,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-10-28 22:51:25,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:25,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713398501] [2021-10-28 22:51:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:25,624 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:25,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:25,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 22:51:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:51:25,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:25,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:25,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:26,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:26,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713398501] [2021-10-28 22:51:26,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713398501] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:26,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:26,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 22:51:26,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709990699] [2021-10-28 22:51:26,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:51:26,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:51:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:26,295 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:51:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:27,600 INFO L93 Difference]: Finished difference Result 237 states and 296 transitions. [2021-10-28 22:51:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:51:27,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 14 [2021-10-28 22:51:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:27,604 INFO L225 Difference]: With dead ends: 237 [2021-10-28 22:51:27,604 INFO L226 Difference]: Without dead ends: 237 [2021-10-28 22:51:27,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:51:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-28 22:51:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-10-28 22:51:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 124 states have (on average 1.5887096774193548) internal successors, (197), 174 states have internal predecessors, (197), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-10-28 22:51:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-10-28 22:51:27,621 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-10-28 22:51:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:27,621 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-10-28 22:51:27,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:51:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-10-28 22:51:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:51:27,623 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:27,623 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:27,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:27,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:27,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-10-28 22:51:27,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:27,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959142945] [2021-10-28 22:51:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:27,847 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:27,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:27,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 22:51:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:51:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:28,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:51:28,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:51:28,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959142945] [2021-10-28 22:51:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959142945] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:51:28,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:51:28,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-28 22:51:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806455273] [2021-10-28 22:51:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:51:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:51:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:51:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:51:28,370 INFO L87 Difference]: Start difference. First operand 229 states and 282 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:51:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:51:28,552 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2021-10-28 22:51:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:51:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-10-28 22:51:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:51:28,556 INFO L225 Difference]: With dead ends: 250 [2021-10-28 22:51:28,556 INFO L226 Difference]: Without dead ends: 250 [2021-10-28 22:51:28,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:51:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-28 22:51:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 233. [2021-10-28 22:51:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 127 states have (on average 1.5748031496062993) internal successors, (200), 177 states have internal predecessors, (200), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2021-10-28 22:51:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 285 transitions. [2021-10-28 22:51:28,578 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 285 transitions. Word has length 21 [2021-10-28 22:51:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:51:28,579 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 285 transitions. [2021-10-28 22:51:28,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:51:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 285 transitions. [2021-10-28 22:51:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 22:51:28,585 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:51:28,585 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:51:28,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:51:28,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:51:28,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:51:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:51:28,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1907346070, now seen corresponding path program 1 times [2021-10-28 22:51:28,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:51:28,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916707231] [2021-10-28 22:51:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:51:28,801 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:51:28,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:51:28,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:51:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 22:51:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:51:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 22:51:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:51:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:51:29,531 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:51:29,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-28 22:51:29,545 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:51:29,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 22:51:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 22:51:29,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:51:31,869 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 [2021-10-28 22:51:42,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:51:42,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 128 [2021-10-28 22:51:42,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:51:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 132 [2021-10-28 22:51:57,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:51:57,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 122 [2021-10-28 22:51:57,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 22:51:57,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 126 [2021-10-28 22:52:19,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_4 (_ BitVec 32)) (v_nondet_tree_~n~0.base_20 (_ BitVec 32)) (v_nondet_tree_~n~0.base_BEFORE_CALL_6 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (and (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_20 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6)) (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse0))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_nondet_tree_~n~0.base_20)))))) (_ bv0 1))) (exists ((v_nondet_tree_~n~0.base_19 (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4))) (or (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_BEFORE_CALL_4) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| v_nondet_tree_~n~0.base_19 (_ bv12 32)) v_nondet_tree_~n~0.base_BEFORE_CALL_6))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| v_nondet_tree_~n~0.base_19)))))))))) is different from false [2021-10-28 22:52:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2021-10-28 22:52:19,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:52:19,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916707231] [2021-10-28 22:52:19,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916707231] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 22:52:19,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:52:19,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-28 22:52:19,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114796600] [2021-10-28 22:52:19,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:52:19,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:52:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:52:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=51, Unknown=6, NotChecked=30, Total=110 [2021-10-28 22:52:19,947 INFO L87 Difference]: Start difference. First operand 233 states and 285 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 22:55:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:31,156 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-10-28 22:55:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:55:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2021-10-28 22:55:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:31,158 INFO L225 Difference]: With dead ends: 145 [2021-10-28 22:55:31,159 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 22:55:31,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=29, Invalid=63, Unknown=6, NotChecked=34, Total=132 [2021-10-28 22:55:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 22:55:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-28 22:55:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 111 states have internal predecessors, (114), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-10-28 22:55:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2021-10-28 22:55:31,167 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 38 [2021-10-28 22:55:31,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:31,167 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2021-10-28 22:55:31,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-10-28 22:55:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2021-10-28 22:55:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 22:55:31,169 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:31,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:31,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:31,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:31,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting tree_inorderErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-10-28 22:55:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2132967547, now seen corresponding path program 1 times [2021-10-28 22:55:31,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 22:55:31,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068005115] [2021-10-28 22:55:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:31,374 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 22:55:31,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 22:55:31,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 22:55:31,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 22:55:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:55:31,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:31,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 22:55:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:32,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 22:55:32,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068005115] [2021-10-28 22:55:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068005115] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:32,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-28 22:55:32,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63778960] [2021-10-28 22:55:32,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:55:32,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 22:55:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:55:32,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:32,028 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 22:55:32,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:32,058 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2021-10-28 22:55:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 38 [2021-10-28 22:55:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:32,059 INFO L225 Difference]: With dead ends: 28 [2021-10-28 22:55:32,059 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:55:32,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:55:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:55:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:55:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:55:32,060 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-10-28 22:55:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:32,060 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:55:32,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 22:55:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:55:32,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:55:32,063 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:55:32,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr0REQUIRES_VIOLATION [2021-10-28 22:55:32,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr1REQUIRES_VIOLATION [2021-10-28 22:55:32,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr2REQUIRES_VIOLATION [2021-10-28 22:55:32,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr3REQUIRES_VIOLATION [2021-10-28 22:55:32,064 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr4REQUIRES_VIOLATION [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr5REQUIRES_VIOLATION [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr6REQUIRES_VIOLATION [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr7REQUIRES_VIOLATION [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr11REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr12REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr13REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_delErr14REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr0REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr1REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr2REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr3REQUIRES_VIOLATION [2021-10-28 22:55:32,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr4REQUIRES_VIOLATION [2021-10-28 22:55:32,067 INFO L764 garLoopResultBuilder]: Registering result SAFE for location minErr5REQUIRES_VIOLATION [2021-10-28 22:55:32,067 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr0REQUIRES_VIOLATION [2021-10-28 22:55:32,067 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr1REQUIRES_VIOLATION [2021-10-28 22:55:32,067 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr2REQUIRES_VIOLATION [2021-10-28 22:55:32,067 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr3REQUIRES_VIOLATION [2021-10-28 22:55:32,067 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr4REQUIRES_VIOLATION [2021-10-28 22:55:32,068 INFO L764 garLoopResultBuilder]: Registering result SAFE for location nondet_treeErr5REQUIRES_VIOLATION [2021-10-28 22:55:32,068 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr0REQUIRES_VIOLATION [2021-10-28 22:55:32,068 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr1REQUIRES_VIOLATION [2021-10-28 22:55:32,068 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr2REQUIRES_VIOLATION [2021-10-28 22:55:32,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr3REQUIRES_VIOLATION [2021-10-28 22:55:32,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr4REQUIRES_VIOLATION [2021-10-28 22:55:32,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr5REQUIRES_VIOLATION [2021-10-28 22:55:32,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr6REQUIRES_VIOLATION [2021-10-28 22:55:32,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr7REQUIRES_VIOLATION [2021-10-28 22:55:32,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,071 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,071 INFO L764 garLoopResultBuilder]: Registering result SAFE for location taskErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:55:32,071 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr0REQUIRES_VIOLATION [2021-10-28 22:55:32,071 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr1REQUIRES_VIOLATION [2021-10-28 22:55:32,072 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr2REQUIRES_VIOLATION [2021-10-28 22:55:32,072 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sizeErr3REQUIRES_VIOLATION [2021-10-28 22:55:32,072 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:55:32,072 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr0REQUIRES_VIOLATION [2021-10-28 22:55:32,085 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr1REQUIRES_VIOLATION [2021-10-28 22:55:32,086 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr2REQUIRES_VIOLATION [2021-10-28 22:55:32,086 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr3REQUIRES_VIOLATION [2021-10-28 22:55:32,086 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr4REQUIRES_VIOLATION [2021-10-28 22:55:32,086 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr5REQUIRES_VIOLATION [2021-10-28 22:55:32,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr6REQUIRES_VIOLATION [2021-10-28 22:55:32,087 INFO L764 garLoopResultBuilder]: Registering result SAFE for location tree_inorderErr7REQUIRES_VIOLATION [2021-10-28 22:55:32,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:32,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 22:55:32,303 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:32,306 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:55:32,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:55:32 BoogieIcfgContainer [2021-10-28 22:55:32,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:55:32,310 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:55:32,310 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:55:32,310 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:55:32,311 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:51:20" (3/4) ... [2021-10-28 22:55:32,315 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:55:32,323 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 22:55:32,323 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet_tree [2021-10-28 22:55:32,323 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 22:55:32,323 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_del [2021-10-28 22:55:32,324 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 22:55:32,324 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure min [2021-10-28 22:55:32,324 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure task [2021-10-28 22:55:32,324 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure size [2021-10-28 22:55:32,324 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_cycle_if_not [2021-10-28 22:55:32,325 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-28 22:55:32,325 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-28 22:55:32,325 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure tree_inorder [2021-10-28 22:55:32,337 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2021-10-28 22:55:32,338 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 22:55:32,339 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 22:55:32,340 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:55:32,454 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:55:32,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:55:32,456 INFO L168 Benchmark]: Toolchain (without parser) took 253823.53 ms. Allocated memory was 71.3 MB in the beginning and 100.7 MB in the end (delta: 29.4 MB). Free memory was 52.4 MB in the beginning and 70.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:32,457 INFO L168 Benchmark]: CDTParser took 2.66 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 51.1 MB in the end (delta: 55.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:55:32,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 471.59 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 52.7 MB in the end (delta: -450.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:32,458 INFO L168 Benchmark]: Boogie Preprocessor took 63.37 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 50.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:32,458 INFO L168 Benchmark]: RCFGBuilder took 1262.85 ms. Allocated memory is still 71.3 MB. Free memory was 50.0 MB in the beginning and 43.4 MB in the end (delta: 6.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:32,459 INFO L168 Benchmark]: TraceAbstraction took 251874.51 ms. Allocated memory was 71.3 MB in the beginning and 100.7 MB in the end (delta: 29.4 MB). Free memory was 43.1 MB in the beginning and 76.3 MB in the end (delta: -33.1 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:32,459 INFO L168 Benchmark]: Witness Printer took 144.46 ms. Allocated memory is still 100.7 MB. Free memory was 76.3 MB in the beginning and 70.4 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 22:55:32,462 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.66 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 51.1 MB in the end (delta: 55.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 471.59 ms. Allocated memory is still 71.3 MB. Free memory was 52.2 MB in the beginning and 52.7 MB in the end (delta: -450.3 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.37 ms. Allocated memory is still 71.3 MB. Free memory was 52.7 MB in the beginning and 50.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1262.85 ms. Allocated memory is still 71.3 MB. Free memory was 50.0 MB in the beginning and 43.4 MB in the end (delta: 6.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 251874.51 ms. Allocated memory was 71.3 MB in the beginning and 100.7 MB in the end (delta: 29.4 MB). Free memory was 43.1 MB in the beginning and 76.3 MB in the end (delta: -33.1 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. * Witness Printer took 144.46 ms. Allocated memory is still 100.7 MB. Free memory was 76.3 MB in the beginning and 70.4 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 101]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 52]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 53]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 56]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 40]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 41]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 41]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 31]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 31]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 85]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 85]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 88]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 88]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 96]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 97]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 98]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 74]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 65]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 65]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 66]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 67]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 67]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 188 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 251.8s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 195.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1268 SDtfs, 474 SDslu, 3421 SDs, 0 SdLazy, 1055 SolverSat, 152 SolverUnsat, 94 SolverUnknown, 0 SolverNotchecked, 192.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 53.3s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 296 ConstructedInterpolants, 31 QuantifiedInterpolants, 1673 SizeOfPredicates, 12 NumberOfNonLiveVariables, 924 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 68/86 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 55 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 22:55:32,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e7bc77b-20b5-43ff-8845-46cb346e49a4/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...