./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:09:36,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:09:36,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:09:36,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:09:36,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:09:36,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:09:36,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:09:36,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:09:36,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:09:36,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:09:36,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:09:36,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:09:36,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:09:36,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:09:36,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:09:36,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:09:36,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:09:36,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:09:36,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:09:36,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:09:36,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:09:36,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:09:36,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:09:36,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:09:36,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:09:36,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:09:36,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:09:36,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:09:36,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:09:36,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:09:36,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:09:36,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:09:36,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:09:36,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:09:36,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:09:36,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:09:36,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:09:36,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:09:36,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:09:36,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:09:36,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:09:36,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-11-19 04:09:36,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:09:36,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:09:36,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:09:36,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:09:36,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:09:36,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:09:36,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:09:36,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:09:36,319 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:09:36,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:09:36,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:09:36,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:09:36,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:09:36,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:09:36,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:09:36,321 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:09:36,321 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:09:36,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:09:36,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:09:36,321 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:09:36,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:09:36,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:09:36,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:09:36,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:09:36,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:09:36,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:09:36,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:09:36,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:09:36,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:09:36,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:09:36,328 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_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-11-19 04:09:36,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:09:36,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:09:36,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:09:36,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:09:36,737 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:09:36,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-11-19 04:09:36,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/656beb0f0/759bb2afc4ad409dbbcd45385cc8f5fe/FLAG46d9e8322 [2021-11-19 04:09:37,410 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:09:37,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-11-19 04:09:37,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/656beb0f0/759bb2afc4ad409dbbcd45385cc8f5fe/FLAG46d9e8322 [2021-11-19 04:09:37,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/656beb0f0/759bb2afc4ad409dbbcd45385cc8f5fe [2021-11-19 04:09:37,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:09:37,719 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:09:37,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:09:37,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:09:37,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:09:37,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd1119a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:37, skipping insertion in model container [2021-11-19 04:09:37,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:37" (1/1) ... [2021-11-19 04:09:37,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:09:37,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:09:37,951 WARN L230 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_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-11-19 04:09:37,970 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:37,976 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:38,009 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:09:38,035 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) [2021-11-19 04:09:38,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@99e0305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:38, skipping insertion in model container [2021-11-19 04:09:38,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:09:38,037 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-19 04:09:38,039 INFO L158 Benchmark]: Toolchain (without parser) took 318.96ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 91.8MB in the end (delta: -2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:09:38,040 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:09:38,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.94ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 91.8MB in the end (delta: -2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:09:38,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.94ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 91.8MB in the end (delta: -2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:09:40,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:09:40,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:09:40,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:09:40,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:09:40,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:09:40,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:09:40,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:09:40,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:09:40,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:09:40,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:09:40,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:09:40,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:09:40,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:09:40,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:09:40,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:09:40,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:09:40,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:09:40,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:09:40,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:09:40,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:09:40,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:09:40,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:09:40,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:09:40,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:09:40,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:09:40,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:09:40,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:09:40,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:09:40,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:09:40,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:09:40,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:09:40,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:09:40,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:09:40,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:09:40,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:09:40,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:09:40,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:09:40,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:09:40,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:09:40,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:09:40,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-11-19 04:09:40,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:09:40,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:09:40,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:09:40,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:09:40,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:09:40,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:09:40,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:09:40,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:09:40,728 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:09:40,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:09:40,730 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:09:40,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:09:40,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:09:40,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:09:40,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:09:40,731 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:09:40,731 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:09:40,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:09:40,732 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:09:40,732 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 04:09:40,732 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 04:09:40,732 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:09:40,732 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:09:40,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:09:40,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:09:40,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:09:40,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:09:40,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:09:40,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:09:40,734 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 04:09:40,735 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 04:09:40,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:09:40,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 04:09:40,735 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_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2021-11-19 04:09:41,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:09:41,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:09:41,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:09:41,189 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:09:41,190 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:09:41,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2021-11-19 04:09:41,272 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/390d9c2ce/dac2862a4cb5458e92df84b99c1d24c4/FLAGc006dbcbc [2021-11-19 04:09:41,937 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:09:41,938 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/sv-benchmarks/c/verifythis/tree_del_rec.c [2021-11-19 04:09:41,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/390d9c2ce/dac2862a4cb5458e92df84b99c1d24c4/FLAGc006dbcbc [2021-11-19 04:09:42,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/data/390d9c2ce/dac2862a4cb5458e92df84b99c1d24c4 [2021-11-19 04:09:42,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:09:42,258 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:09:42,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:09:42,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:09:42,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:09:42,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e11ffb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42, skipping insertion in model container [2021-11-19 04:09:42,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:09:42,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:09:42,513 WARN L230 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_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-11-19 04:09:42,532 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:42,536 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:42,567 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:09:42,596 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 04:09:42,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:09:42,608 WARN L230 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_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-11-19 04:09:42,616 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:42,621 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:42,653 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:09:42,661 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:09:42,674 WARN L230 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_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2021-11-19 04:09:42,680 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:42,682 WARN L1537 CHandler]: Possible shadowing of function min [2021-11-19 04:09:42,693 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:09:42,715 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:09:42,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42 WrapperNode [2021-11-19 04:09:42,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:09:42,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:09:42,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:09:42,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:09:42,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:09:42,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:09:42,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:09:42,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:09:42,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (1/1) ... [2021-11-19 04:09:42,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:09:42,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:09:42,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:09:42,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-11-19 04:09:42,875 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-11-19 04:09:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-11-19 04:09:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-11-19 04:09:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-11-19 04:09:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:09:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 04:09:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:09:42,876 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:09:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-11-19 04:09:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-11-19 04:09:42,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:09:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 04:09:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:09:42,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:09:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 04:09:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:09:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 04:09:42,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 04:09:43,011 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:09:43,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:09:43,845 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:09:43,855 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:09:43,855 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:09:43,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:43 BoogieIcfgContainer [2021-11-19 04:09:43,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:09:43,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:09:43,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:09:43,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:09:43,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:09:42" (1/3) ... [2021-11-19 04:09:43,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ed67e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:43, skipping insertion in model container [2021-11-19 04:09:43,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:42" (2/3) ... [2021-11-19 04:09:43,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ed67e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:43, skipping insertion in model container [2021-11-19 04:09:43,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:43" (3/3) ... [2021-11-19 04:09:43,867 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-11-19 04:09:43,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:09:43,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-11-19 04:09:43,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:09:43,930 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 [2021-11-19 04:09:43,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-11-19 04:09:43,951 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) [2021-11-19 04:09:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 04:09:43,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:43,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:43,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 927264949, now seen corresponding path program 1 times [2021-11-19 04:09:43,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:43,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293764853] [2021-11-19 04:09:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:44,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:44,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 04:09:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:09:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:44,243 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 [2021-11-19 04:09:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:44,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:44,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:09:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293764853] [2021-11-19 04:09:44,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293764853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:44,338 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 04:09:44,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679421279] [2021-11-19 04:09:44,341 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:44,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:09:44,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:09:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:09:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:09:44,391 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) [2021-11-19 04:09:44,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:44,791 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2021-11-19 04:09:44,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:44,794 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 [2021-11-19 04:09:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:44,808 INFO L225 Difference]: With dead ends: 186 [2021-11-19 04:09:44,808 INFO L226 Difference]: Without dead ends: 182 [2021-11-19 04:09:44,810 INFO L932 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 [2021-11-19 04:09:44,815 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 6 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:44,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 349 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:09:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-19 04:09:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-11-19 04:09:44,885 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) [2021-11-19 04:09:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2021-11-19 04:09:44,894 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 8 [2021-11-19 04:09:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:44,894 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2021-11-19 04:09:44,895 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) [2021-11-19 04:09:44,895 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2021-11-19 04:09:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 04:09:44,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:44,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:44,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 04:09:45,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:09:45,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash 927264950, now seen corresponding path program 1 times [2021-11-19 04:09:45,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:45,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685648025] [2021-11-19 04:09:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:45,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:45,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:45,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 04:09:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:09:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:45,234 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 [2021-11-19 04:09:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:45,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:09:45,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685648025] [2021-11-19 04:09:45,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685648025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:45,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:45,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 04:09:45,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102549095] [2021-11-19 04:09:45,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:09:45,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:09:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:09:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:09:45,330 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) [2021-11-19 04:09:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:45,905 INFO L93 Difference]: Finished difference Result 179 states and 201 transitions. [2021-11-19 04:09:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:09:45,908 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 [2021-11-19 04:09:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:45,910 INFO L225 Difference]: With dead ends: 179 [2021-11-19 04:09:45,910 INFO L226 Difference]: Without dead ends: 179 [2021-11-19 04:09:45,911 INFO L932 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 [2021-11-19 04:09:45,912 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 2 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:45,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 494 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:09:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-19 04:09:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-19 04:09:45,929 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) [2021-11-19 04:09:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-11-19 04:09:45,932 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 8 [2021-11-19 04:09:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:45,933 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-11-19 04:09:45,933 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) [2021-11-19 04:09:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-11-19 04:09:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:09:45,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:45,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:45,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:46,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:09:46,143 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr1REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash -224832078, now seen corresponding path program 1 times [2021-11-19 04:09:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:46,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771070741] [2021-11-19 04:09:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:46,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:46,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:46,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 04:09:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:46,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:09:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:46,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:46,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:09:46,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771070741] [2021-11-19 04:09:46,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771070741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:46,541 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:46,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-19 04:09:46,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357861951] [2021-11-19 04:09:46,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:46,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:09:46,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:09:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:09:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:09:46,550 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) [2021-11-19 04:09:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:46,756 INFO L93 Difference]: Finished difference Result 244 states and 283 transitions. [2021-11-19 04:09:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:09:46,759 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 [2021-11-19 04:09:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:46,764 INFO L225 Difference]: With dead ends: 244 [2021-11-19 04:09:46,764 INFO L226 Difference]: Without dead ends: 244 [2021-11-19 04:09:46,766 INFO L932 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 [2021-11-19 04:09:46,770 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 89 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:46,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1430 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:09:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-19 04:09:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2021-11-19 04:09:46,808 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) [2021-11-19 04:09:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 278 transitions. [2021-11-19 04:09:46,810 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 278 transitions. Word has length 15 [2021-11-19 04:09:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:46,811 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 278 transitions. [2021-11-19 04:09:46,811 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) [2021-11-19 04:09:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 278 transitions. [2021-11-19 04:09:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 04:09:46,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:46,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:46,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 04:09:47,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:09:47,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:47,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770822, now seen corresponding path program 1 times [2021-11-19 04:09:47,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:47,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867209272] [2021-11-19 04:09:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:47,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:47,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:47,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:47,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 04:09:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:47,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:09:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:47,106 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 [2021-11-19 04:09:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:47,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:47,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:09:47,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867209272] [2021-11-19 04:09:47,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867209272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:47,251 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:47,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 04:09:47,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297112709] [2021-11-19 04:09:47,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:47,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:09:47,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:09:47,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:09:47,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:09:47,254 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) [2021-11-19 04:09:47,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:47,906 INFO L93 Difference]: Finished difference Result 231 states and 282 transitions. [2021-11-19 04:09:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:09:47,907 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 [2021-11-19 04:09:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:47,910 INFO L225 Difference]: With dead ends: 231 [2021-11-19 04:09:47,910 INFO L226 Difference]: Without dead ends: 231 [2021-11-19 04:09:47,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:09:47,911 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 95 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:47,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 294 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 227 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2021-11-19 04:09:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-19 04:09:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-11-19 04:09:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 123 states have (on average 1.6260162601626016) internal successors, (200), 174 states have internal predecessors, (200), 40 states have call successors, (40), 13 states have call predecessors, (40), 13 states have return successors, (42), 41 states have call predecessors, (42), 39 states have call successors, (42) [2021-11-19 04:09:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 282 transitions. [2021-11-19 04:09:47,933 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 282 transitions. Word has length 14 [2021-11-19 04:09:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:47,933 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 282 transitions. [2021-11-19 04:09:47,934 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) [2021-11-19 04:09:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 282 transitions. [2021-11-19 04:09:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 04:09:47,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:47,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:47,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:48,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:09:48,147 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1342770823, now seen corresponding path program 1 times [2021-11-19 04:09:48,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:48,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571004989] [2021-11-19 04:09:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:48,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:48,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:48,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:48,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 04:09:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:48,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:09:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:48,240 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 [2021-11-19 04:09:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:48,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:48,646 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:09:48,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571004989] [2021-11-19 04:09:48,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571004989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:48,646 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:48,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 04:09:48,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822646457] [2021-11-19 04:09:48,647 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:09:48,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:09:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:09:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:48,649 INFO L87 Difference]: Start difference. First operand 229 states and 282 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) [2021-11-19 04:09:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:49,938 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2021-11-19 04:09:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:09:49,939 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 [2021-11-19 04:09:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:49,941 INFO L225 Difference]: With dead ends: 239 [2021-11-19 04:09:49,941 INFO L226 Difference]: Without dead ends: 239 [2021-11-19 04:09:49,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:09:49,942 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 104 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:49,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 340 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 391 Invalid, 0 Unknown, 49 Unchecked, 1.3s Time] [2021-11-19 04:09:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-19 04:09:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2021-11-19 04:09:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 125 states have (on average 1.608) internal successors, (201), 176 states have internal predecessors, (201), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (44), 42 states have call predecessors, (44), 40 states have call successors, (44) [2021-11-19 04:09:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 286 transitions. [2021-11-19 04:09:49,962 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 286 transitions. Word has length 14 [2021-11-19 04:09:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 286 transitions. [2021-11-19 04:09:49,962 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) [2021-11-19 04:09:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 286 transitions. [2021-11-19 04:09:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:09:49,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:49,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:49,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:50,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:09:50,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1946011837, now seen corresponding path program 1 times [2021-11-19 04:09:50,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:50,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271198847] [2021-11-19 04:09:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:50,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:50,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:50,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 04:09:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:09:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:50,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:09:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:09:50,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:09:50,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271198847] [2021-11-19 04:09:50,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271198847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:09:50,596 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:09:50,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-19 04:09:50,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691035400] [2021-11-19 04:09:50,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:09:50,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:09:50,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:09:50,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:09:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:09:50,598 INFO L87 Difference]: Start difference. First operand 232 states and 286 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) [2021-11-19 04:09:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:09:50,780 INFO L93 Difference]: Finished difference Result 253 states and 295 transitions. [2021-11-19 04:09:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:09:50,781 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 [2021-11-19 04:09:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:09:50,784 INFO L225 Difference]: With dead ends: 253 [2021-11-19 04:09:50,785 INFO L226 Difference]: Without dead ends: 253 [2021-11-19 04:09:50,785 INFO L932 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 [2021-11-19 04:09:50,786 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 88 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:09:50,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1427 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:09:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-19 04:09:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 236. [2021-11-19 04:09:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 128 states have (on average 1.59375) internal successors, (204), 179 states have internal predecessors, (204), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (44), 42 states have call predecessors, (44), 40 states have call successors, (44) [2021-11-19 04:09:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 289 transitions. [2021-11-19 04:09:50,812 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 289 transitions. Word has length 21 [2021-11-19 04:09:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:09:50,812 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 289 transitions. [2021-11-19 04:09:50,813 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) [2021-11-19 04:09:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 289 transitions. [2021-11-19 04:09:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:09:50,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:09:50,815 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:09:50,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:09:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:09:51,027 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, tree_delErr0REQUIRES_VIOLATION, tree_delErr1REQUIRES_VIOLATION, tree_delErr2REQUIRES_VIOLATION (and 51 more)] === [2021-11-19 04:09:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:09:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1907346071, now seen corresponding path program 1 times [2021-11-19 04:09:51,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:09:51,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955477142] [2021-11-19 04:09:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:09:51,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:09:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:09:51,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:09:51,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4071434c-a7cf-4ef0-b031-6f73fcb9ccfd/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 04:09:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:09:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:09:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:09:51,305 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 [2021-11-19 04:09:51,556 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-19 04:09:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-19 04:09:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:09:51,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:10:00,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:10:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 124