./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0 --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 cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:04:11,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:04:11,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:04:11,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:04:11,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:04:11,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:04:11,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:04:11,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:04:11,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:04:11,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:04:11,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:04:11,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:04:11,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:04:11,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:04:11,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:04:11,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:04:11,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:04:11,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:04:11,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:04:11,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:04:11,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:04:11,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:04:11,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:04:11,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:04:11,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:04:11,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:04:11,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:04:11,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:04:11,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:04:11,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:04:11,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:04:11,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:04:11,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:04:11,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:04:11,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:04:11,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:04:11,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:04:11,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:04:11,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:04:11,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:04:11,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:04:11,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-11-22 16:04:11,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:04:11,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:04:11,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:04:11,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:04:11,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:04:11,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:04:11,601 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:04:11,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:04:11,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:04:11,603 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:04:11,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:04:11,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:04:11,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:04:11,604 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:04:11,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:04:11,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:04:11,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:04:11,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:04:11,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:04:11,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:04:11,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:04:11,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:04:11,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:04:11,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:04:11,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:04:11,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:04:11,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:04:11,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:04:11,608 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2021-11-22 16:04:12,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:04:12,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:04:12,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:04:12,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:04:12,055 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:04:12,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2021-11-22 16:04:12,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/705dc803f/3547a496afa5466f8b5524bd081a6291/FLAGe3bffad9e [2021-11-22 16:04:12,862 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:04:12,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/sv-benchmarks/c/verifythis/tree_del_iter.c [2021-11-22 16:04:12,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/705dc803f/3547a496afa5466f8b5524bd081a6291/FLAGe3bffad9e [2021-11-22 16:04:13,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/705dc803f/3547a496afa5466f8b5524bd081a6291 [2021-11-22 16:04:13,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:04:13,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:04:13,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:04:13,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:04:13,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:04:13,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:04:13" (1/1) ... [2021-11-22 16:04:13,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e35a08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:13, skipping insertion in model container [2021-11-22 16:04:13,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:04:13" (1/1) ... [2021-11-22 16:04:13,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:04:13,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:04:13,447 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-11-22 16:04:13,474 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-22 16:04:13,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:04:13,531 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) [2021-11-22 16:04:13,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b9f2997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:13, skipping insertion in model container [2021-11-22 16:04:13,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:04:13,532 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-22 16:04:13,535 INFO L158 Benchmark]: Toolchain (without parser) took 347.03ms. Allocated memory is still 134.2MB. Free memory was 101.6MB in the beginning and 109.0MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 16:04:13,536 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 88.1MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 43.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:04:13,537 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.73ms. Allocated memory is still 134.2MB. Free memory was 101.6MB in the beginning and 109.0MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 16:04:13,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 88.1MB. Free memory was 43.3MB in the beginning and 43.3MB in the end (delta: 43.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.73ms. Allocated memory is still 134.2MB. Free memory was 101.6MB in the beginning and 109.0MB in the end (delta: -7.4MB). 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0 --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 cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:04:16,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:04:16,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:04:16,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:04:16,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:04:16,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:04:16,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:04:16,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:04:16,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:04:16,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:04:16,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:04:16,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:04:16,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:04:16,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:04:16,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:04:16,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:04:16,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:04:16,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:04:16,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:04:16,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:04:16,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:04:16,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:04:16,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:04:16,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:04:16,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:04:16,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:04:16,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:04:16,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:04:16,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:04:16,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:04:16,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:04:16,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:04:16,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:04:16,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:04:16,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:04:16,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:04:16,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:04:16,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:04:16,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:04:16,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:04:16,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:04:16,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-11-22 16:04:16,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:04:16,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:04:16,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:04:16,545 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:04:16,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:04:16,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:04:16,547 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:04:16,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:04:16,547 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:04:16,548 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:04:16,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:04:16,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:04:16,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:04:16,549 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:04:16,549 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:04:16,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:04:16,549 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:04:16,550 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 16:04:16,550 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 16:04:16,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:04:16,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:04:16,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:04:16,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:04:16,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:04:16,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:04:16,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:04:16,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:04:16,552 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 16:04:16,552 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 16:04:16,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:04:16,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 16:04:16,553 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce1bb7a06b9dd56fbf663e182ffe801720ee05ee19a126a08070f1616bc4afe [2021-11-22 16:04:17,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:04:17,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:04:17,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:04:17,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:04:17,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:04:17,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/verifythis/tree_del_iter.c [2021-11-22 16:04:17,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/917d8419d/1eb7f8c91164402780580a489161ed2d/FLAGf5cb81364 [2021-11-22 16:04:17,711 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:04:17,712 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/sv-benchmarks/c/verifythis/tree_del_iter.c [2021-11-22 16:04:17,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/917d8419d/1eb7f8c91164402780580a489161ed2d/FLAGf5cb81364 [2021-11-22 16:04:18,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/data/917d8419d/1eb7f8c91164402780580a489161ed2d [2021-11-22 16:04:18,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:04:18,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:04:18,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:04:18,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:04:18,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:04:18,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536df96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18, skipping insertion in model container [2021-11-22 16:04:18,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:04:18,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:04:18,278 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-11-22 16:04:18,304 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-22 16:04:18,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:04:18,393 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-22 16:04:18,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:04:18,410 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-11-22 16:04:18,422 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-22 16:04:18,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:04:18,460 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:04:18,474 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_2cb1a720-beee-4cc2-b84a-a6b37036745b/sv-benchmarks/c/verifythis/tree_del_iter.c[586,599] [2021-11-22 16:04:18,485 WARN L1533 CHandler]: Possible shadowing of function min [2021-11-22 16:04:18,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:04:18,536 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:04:18,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18 WrapperNode [2021-11-22 16:04:18,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:04:18,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:04:18,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:04:18,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:04:18,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,619 INFO L137 Inliner]: procedures = 31, calls = 64, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 140 [2021-11-22 16:04:18,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:04:18,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:04:18,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:04:18,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:04:18,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:04:18,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:04:18,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:04:18,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:04:18,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (1/1) ... [2021-11-22 16:04:18,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:04:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:18,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:04:18,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:04:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:04:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 16:04:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:04:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 16:04:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-11-22 16:04:18,837 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-11-22 16:04:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-22 16:04:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 16:04:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-22 16:04:18,839 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-22 16:04:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 16:04:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-11-22 16:04:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-11-22 16:04:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:04:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:04:18,840 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-11-22 16:04:18,840 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-11-22 16:04:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:04:18,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-22 16:04:19,042 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:04:19,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:04:19,954 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:04:19,964 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:04:19,964 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:04:19,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:04:19 BoogieIcfgContainer [2021-11-22 16:04:19,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:04:19,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:04:19,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:04:19,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:04:19,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:04:18" (1/3) ... [2021-11-22 16:04:19,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac52a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:04:19, skipping insertion in model container [2021-11-22 16:04:19,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:18" (2/3) ... [2021-11-22 16:04:19,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac52a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:04:19, skipping insertion in model container [2021-11-22 16:04:19,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:04:19" (3/3) ... [2021-11-22 16:04:19,978 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-11-22 16:04:19,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:04:19,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-11-22 16:04:20,075 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:04:20,083 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 [2021-11-22 16:04:20,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-11-22 16:04:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 104 states have (on average 1.8173076923076923) internal successors, (189), 171 states have internal predecessors, (189), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-22 16:04:20,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 16:04:20,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:20,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 16:04:20,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash 88067099, now seen corresponding path program 1 times [2021-11-22 16:04:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426117314] [2021-11-22 16:04:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:20,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:20,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:20,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 16:04:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:04:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:20,315 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 [2021-11-22 16:04:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:20,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:20,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:20,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426117314] [2021-11-22 16:04:20,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426117314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:20,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 16:04:20,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405641584] [2021-11-22 16:04:20,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:20,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:04:20,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:04:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:20,408 INFO L87 Difference]: Start difference. First operand has 190 states, 104 states have (on average 1.8173076923076923) internal successors, (189), 171 states have internal predecessors, (189), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:20,850 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2021-11-22 16:04:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:20,861 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-22 16:04:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:20,884 INFO L225 Difference]: With dead ends: 191 [2021-11-22 16:04:20,884 INFO L226 Difference]: Without dead ends: 188 [2021-11-22 16:04:20,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:20,893 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 6 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:20,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 342 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:04:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-22 16:04:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-11-22 16:04:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 102 states have (on average 1.7254901960784315) internal successors, (176), 167 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-22 16:04:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 204 transitions. [2021-11-22 16:04:21,014 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 204 transitions. Word has length 5 [2021-11-22 16:04:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:21,016 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 204 transitions. [2021-11-22 16:04:21,016 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 204 transitions. [2021-11-22 16:04:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 16:04:21,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:21,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 16:04:21,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:21,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:21,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 88067100, now seen corresponding path program 1 times [2021-11-22 16:04:21,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575810425] [2021-11-22 16:04:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:21,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:21,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:21,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 16:04:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:04:21,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:21,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:04:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:21,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575810425] [2021-11-22 16:04:21,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575810425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:21,389 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:21,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-22 16:04:21,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823205782] [2021-11-22 16:04:21,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:21,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:04:21,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:04:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:04:21,393 INFO L87 Difference]: Start difference. First operand 186 states and 204 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:22,158 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2021-11-22 16:04:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:22,161 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-22 16:04:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:22,164 INFO L225 Difference]: With dead ends: 185 [2021-11-22 16:04:22,164 INFO L226 Difference]: Without dead ends: 185 [2021-11-22 16:04:22,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:04:22,166 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 2 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:22,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 488 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:04:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-22 16:04:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-22 16:04:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 102 states have (on average 1.7156862745098038) internal successors, (175), 166 states have internal predecessors, (175), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-22 16:04:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 203 transitions. [2021-11-22 16:04:22,185 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 203 transitions. Word has length 5 [2021-11-22 16:04:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:22,185 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 203 transitions. [2021-11-22 16:04:22,186 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 203 transitions. [2021-11-22 16:04:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:04:22,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:22,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:22,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:22,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:22,401 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 399009253, now seen corresponding path program 1 times [2021-11-22 16:04:22,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:22,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652223928] [2021-11-22 16:04:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:22,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:22,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:22,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 16:04:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:04:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:22,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:22,795 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:22,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652223928] [2021-11-22 16:04:22,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652223928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:22,796 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:22,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-22 16:04:22,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155448111] [2021-11-22 16:04:22,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:04:22,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:04:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:04:22,807 INFO L87 Difference]: Start difference. First operand 185 states and 203 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 16:04:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:22,986 INFO L93 Difference]: Finished difference Result 306 states and 334 transitions. [2021-11-22 16:04:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:04:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-22 16:04:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:22,990 INFO L225 Difference]: With dead ends: 306 [2021-11-22 16:04:22,996 INFO L226 Difference]: Without dead ends: 306 [2021-11-22 16:04:22,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:04:22,998 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 223 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:22,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 1195 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:04:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-22 16:04:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 193. [2021-11-22 16:04:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 107 states have (on average 1.6822429906542056) internal successors, (180), 172 states have internal predecessors, (180), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-11-22 16:04:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 213 transitions. [2021-11-22 16:04:23,036 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 213 transitions. Word has length 11 [2021-11-22 16:04:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:23,037 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 213 transitions. [2021-11-22 16:04:23,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 16:04:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 213 transitions. [2021-11-22 16:04:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:04:23,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:23,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:23,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:23,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:23,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash -880475284, now seen corresponding path program 1 times [2021-11-22 16:04:23,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265032522] [2021-11-22 16:04:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:23,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:23,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:23,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:23,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 16:04:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:04:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:23,321 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 [2021-11-22 16:04:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:23,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:23,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265032522] [2021-11-22 16:04:23,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265032522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:23,479 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:23,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 16:04:23,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102946052] [2021-11-22 16:04:23,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:23,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:04:23,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:04:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:23,485 INFO L87 Difference]: Start difference. First operand 193 states and 213 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-22 16:04:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:23,802 INFO L93 Difference]: Finished difference Result 198 states and 218 transitions. [2021-11-22 16:04:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:04:23,803 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2021-11-22 16:04:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:23,806 INFO L225 Difference]: With dead ends: 198 [2021-11-22 16:04:23,806 INFO L226 Difference]: Without dead ends: 198 [2021-11-22 16:04:23,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:23,808 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 5 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:23,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 427 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2021-11-22 16:04:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-22 16:04:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-22 16:04:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.6818181818181819) internal successors, (185), 174 states have internal predecessors, (185), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (18), 16 states have call predecessors, (18), 15 states have call successors, (18) [2021-11-22 16:04:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 218 transitions. [2021-11-22 16:04:23,827 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 218 transitions. Word has length 11 [2021-11-22 16:04:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 218 transitions. [2021-11-22 16:04:23,828 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-22 16:04:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 218 transitions. [2021-11-22 16:04:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:04:23,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:23,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:23,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:24,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:24,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -880475283, now seen corresponding path program 1 times [2021-11-22 16:04:24,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:24,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543820106] [2021-11-22 16:04:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:24,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:24,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:24,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:24,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 16:04:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:24,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:04:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:24,139 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 [2021-11-22 16:04:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:24,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:24,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543820106] [2021-11-22 16:04:24,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543820106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:24,559 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:24,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 16:04:24,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602643103] [2021-11-22 16:04:24,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:24,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:04:24,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:04:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:24,561 INFO L87 Difference]: Start difference. First operand 197 states and 218 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 16:04:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:25,203 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2021-11-22 16:04:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:04:25,205 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-22 16:04:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:25,207 INFO L225 Difference]: With dead ends: 199 [2021-11-22 16:04:25,207 INFO L226 Difference]: Without dead ends: 199 [2021-11-22 16:04:25,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:25,209 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 5 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:25,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 449 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 101 Unchecked, 0.6s Time] [2021-11-22 16:04:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-22 16:04:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-11-22 16:04:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.6727272727272726) internal successors, (184), 174 states have internal predecessors, (184), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (18), 16 states have call predecessors, (18), 15 states have call successors, (18) [2021-11-22 16:04:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 217 transitions. [2021-11-22 16:04:25,223 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 217 transitions. Word has length 11 [2021-11-22 16:04:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:25,223 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 217 transitions. [2021-11-22 16:04:25,223 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, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 16:04:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 217 transitions. [2021-11-22 16:04:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:04:25,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:25,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:25,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:25,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:25,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash 639504337, now seen corresponding path program 1 times [2021-11-22 16:04:25,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:25,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027571461] [2021-11-22 16:04:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:25,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:25,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:25,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 16:04:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:25,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:04:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:25,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:25,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027571461] [2021-11-22 16:04:25,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027571461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:25,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:25,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-22 16:04:25,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480069031] [2021-11-22 16:04:25,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:25,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:04:25,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:04:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:04:25,818 INFO L87 Difference]: Start difference. First operand 197 states and 217 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 16:04:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:25,971 INFO L93 Difference]: Finished difference Result 314 states and 342 transitions. [2021-11-22 16:04:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:04:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-22 16:04:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:25,975 INFO L225 Difference]: With dead ends: 314 [2021-11-22 16:04:25,975 INFO L226 Difference]: Without dead ends: 314 [2021-11-22 16:04:25,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:04:25,977 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 222 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:25,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1193 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:04:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-22 16:04:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 244. [2021-11-22 16:04:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 153 states have (on average 1.6928104575163399) internal successors, (259), 217 states have internal predecessors, (259), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2021-11-22 16:04:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 298 transitions. [2021-11-22 16:04:25,995 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 298 transitions. Word has length 17 [2021-11-22 16:04:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:25,996 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 298 transitions. [2021-11-22 16:04:25,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 16:04:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 298 transitions. [2021-11-22 16:04:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:04:25,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:25,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:26,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:26,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:26,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr5REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1178739806, now seen corresponding path program 1 times [2021-11-22 16:04:26,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:26,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862587288] [2021-11-22 16:04:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:26,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:26,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:26,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:26,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 16:04:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:04:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:26,328 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 [2021-11-22 16:04:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 16:04:26,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 16:04:27,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862587288] [2021-11-22 16:04:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862587288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:27,090 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:27,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 16:04:27,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649884294] [2021-11-22 16:04:27,091 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:27,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:04:27,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:04:27,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:27,092 INFO L87 Difference]: Start difference. First operand 244 states and 298 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-22 16:04:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:28,136 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2021-11-22 16:04:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:04:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 17 [2021-11-22 16:04:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:28,140 INFO L225 Difference]: With dead ends: 251 [2021-11-22 16:04:28,140 INFO L226 Difference]: Without dead ends: 251 [2021-11-22 16:04:28,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:28,142 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 60 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:28,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 442 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 197 Invalid, 0 Unknown, 52 Unchecked, 1.0s Time] [2021-11-22 16:04:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-22 16:04:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2021-11-22 16:04:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 155 states have (on average 1.6903225806451614) internal successors, (262), 219 states have internal predecessors, (262), 19 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (23), 20 states have call predecessors, (23), 19 states have call successors, (23) [2021-11-22 16:04:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 304 transitions. [2021-11-22 16:04:28,161 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 304 transitions. Word has length 17 [2021-11-22 16:04:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:28,161 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 304 transitions. [2021-11-22 16:04:28,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-22 16:04:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 304 transitions. [2021-11-22 16:04:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:04:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:28,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:28,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:28,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:28,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr4REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1104055193, now seen corresponding path program 1 times [2021-11-22 16:04:28,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:28,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729861735] [2021-11-22 16:04:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:28,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:28,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:28,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 16:04:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:04:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:28,497 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 [2021-11-22 16:04:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:04:28,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:04:28,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729861735] [2021-11-22 16:04:28,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729861735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:28,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:28,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 16:04:28,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516241587] [2021-11-22 16:04:28,716 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:28,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:04:28,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:04:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:28,718 INFO L87 Difference]: Start difference. First operand 247 states and 304 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-22 16:04:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:28,997 INFO L93 Difference]: Finished difference Result 252 states and 308 transitions. [2021-11-22 16:04:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:04:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2021-11-22 16:04:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:29,001 INFO L225 Difference]: With dead ends: 252 [2021-11-22 16:04:29,001 INFO L226 Difference]: Without dead ends: 252 [2021-11-22 16:04:29,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:29,003 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 4 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:29,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 426 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2021-11-22 16:04:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-22 16:04:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-11-22 16:04:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 158 states have (on average 1.6835443037974684) internal successors, (266), 221 states have internal predecessors, (266), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (23), 21 states have call predecessors, (23), 19 states have call successors, (23) [2021-11-22 16:04:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 308 transitions. [2021-11-22 16:04:29,017 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 308 transitions. Word has length 21 [2021-11-22 16:04:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:29,017 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 308 transitions. [2021-11-22 16:04:29,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-22 16:04:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 308 transitions. [2021-11-22 16:04:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:04:29,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:29,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:29,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:29,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:29,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [nondet_treeErr0REQUIRES_VIOLATION, nondet_treeErr1REQUIRES_VIOLATION, nondet_treeErr2REQUIRES_VIOLATION, nondet_treeErr3REQUIRES_VIOLATION (and 63 more)] === [2021-11-22 16:04:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash -330787222, now seen corresponding path program 1 times [2021-11-22 16:04:29,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:29,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765877286] [2021-11-22 16:04:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:29,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:29,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:29,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cb1a720-beee-4cc2-b84a-a6b37036745b/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 16:04:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:04:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:29,519 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 [2021-11-22 16:04:29,755 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-22 16:04:29,755 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 [2021-11-22 16:04:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:04:29,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:36,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:04:36,330 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 66 treesize of output 106