./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:53:00,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:53:00,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:53:00,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:53:00,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:53:00,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:53:00,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:53:00,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:53:00,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:53:00,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:53:00,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:53:00,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:53:00,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:53:00,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:53:00,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:53:00,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:53:00,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:53:00,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:53:00,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:53:00,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:53:00,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:53:00,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:53:00,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:53:00,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:53:00,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:53:00,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:53:00,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:53:00,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:53:00,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:53:00,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:53:00,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:53:00,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:53:00,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:53:00,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:53:00,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:53:00,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:53:00,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:53:00,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:53:00,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:53:00,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:53:00,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:53:00,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-12 23:53:00,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:53:00,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:53:00,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:53:00,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:53:00,572 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:53:00,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:53:00,572 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:53:00,572 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:53:00,573 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:53:00,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:53:00,574 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:53:00,574 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:53:00,575 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:53:00,575 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:53:00,575 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:53:00,576 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:53:00,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 23:53:00,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 23:53:00,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:53:00,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:53:00,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:53:00,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:53:00,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:53:00,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:53:00,578 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 23:53:00,579 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 23:53:00,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:53:00,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:53:00,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:53:00,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:53:00,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:53:00,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:53:00,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:00,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:53:00,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:53:00,583 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:53:00,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:53:00,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:53:00,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:53:00,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2021-11-12 23:53:00,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:53:00,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:53:00,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:53:00,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:53:00,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:53:00,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/verifythis/tree_max.c [2021-11-12 23:53:01,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/c59edff2d/58881d0875aa4335b4aed4fe4e4bdb18/FLAG91b3c7cd0 [2021-11-12 23:53:01,492 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:53:01,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/sv-benchmarks/c/verifythis/tree_max.c [2021-11-12 23:53:01,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/c59edff2d/58881d0875aa4335b4aed4fe4e4bdb18/FLAG91b3c7cd0 [2021-11-12 23:53:01,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/c59edff2d/58881d0875aa4335b4aed4fe4e4bdb18 [2021-11-12 23:53:01,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:53:01,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:53:01,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:01,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:53:01,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:53:01,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:01" (1/1) ... [2021-11-12 23:53:01,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fcf7a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:01, skipping insertion in model container [2021-11-12 23:53:01,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:01" (1/1) ... [2021-11-12 23:53:01,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:53:01,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:53:02,067 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-12 23:53:02,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:02,095 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) [2021-11-12 23:53:02,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51de82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:02, skipping insertion in model container [2021-11-12 23:53:02,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:02,096 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:53:02,098 INFO L158 Benchmark]: Toolchain (without parser) took 209.84ms. Allocated memory is still 94.4MB. Free memory was 57.0MB in the beginning and 48.4MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:53:02,099 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:53:02,100 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.82ms. Allocated memory is still 94.4MB. Free memory was 56.9MB in the beginning and 48.4MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:53:02,103 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 74.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.82ms. Allocated memory is still 94.4MB. Free memory was 56.9MB in the beginning and 48.4MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: 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_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:53:04,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:53:04,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:53:04,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:53:04,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:53:04,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:53:04,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:53:04,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:53:04,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:53:04,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:53:04,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:53:04,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:53:04,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:53:04,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:53:04,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:53:04,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:53:04,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:53:04,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:53:04,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:53:04,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:53:04,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:53:04,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:53:04,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:53:04,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:53:04,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:53:04,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:53:04,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:53:04,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:53:04,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:53:04,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:53:04,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:53:04,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:53:04,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:53:04,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:53:04,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:53:04,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:53:04,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:53:04,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:53:04,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:53:04,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:53:04,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:53:04,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-11-12 23:53:04,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:53:04,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:53:04,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:53:04,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:53:04,722 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:53:04,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:53:04,723 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:53:04,723 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:53:04,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:53:04,723 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:53:04,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 23:53:04,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 23:53:04,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:53:04,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:53:04,727 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:53:04,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:53:04,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:53:04,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:53:04,728 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 23:53:04,728 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 23:53:04,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:53:04,729 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:53:04,729 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:53:04,729 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:53:04,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:53:04,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:53:04,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:53:04,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:53:04,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:53:04,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:04,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:53:04,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:53:04,732 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:53:04,732 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:04,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:53:04,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:53:04,733 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_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2021-11-12 23:53:05,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:53:05,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:53:05,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:53:05,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:53:05,194 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:53:05,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/verifythis/tree_max.c [2021-11-12 23:53:05,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/e15bbe3d3/1560a13a72274ae49a2b89e25f268b38/FLAGb14f9ba81 [2021-11-12 23:53:05,743 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:53:05,746 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/sv-benchmarks/c/verifythis/tree_max.c [2021-11-12 23:53:05,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/e15bbe3d3/1560a13a72274ae49a2b89e25f268b38/FLAGb14f9ba81 [2021-11-12 23:53:06,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/data/e15bbe3d3/1560a13a72274ae49a2b89e25f268b38 [2021-11-12 23:53:06,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:53:06,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:53:06,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:06,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:53:06,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:53:06,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307c4c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06, skipping insertion in model container [2021-11-12 23:53:06,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:53:06,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:53:06,340 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-12 23:53:06,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:06,393 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:53:06,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:53:06,419 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-12 23:53:06,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:06,458 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:53:06,473 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-11-12 23:53:06,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:53:06,498 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:53:06,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06 WrapperNode [2021-11-12 23:53:06,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:53:06,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:53:06,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:53:06,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:53:06,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:53:06,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:53:06,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:53:06,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:53:06,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:53:06,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:53:06,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:53:06,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:53:06,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (1/1) ... [2021-11-12 23:53:06,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:53:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:53:06,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:53:06,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:53:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:53:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:53:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:53:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:53:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:53:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-11-12 23:53:06,705 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-11-12 23:53:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-11-12 23:53:06,705 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-11-12 23:53:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-12 23:53:06,706 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-12 23:53:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:53:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:53:06,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:53:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:53:07,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:53:07,227 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:53:07,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:07 BoogieIcfgContainer [2021-11-12 23:53:07,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:53:07,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:53:07,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:53:07,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:53:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:53:06" (1/3) ... [2021-11-12 23:53:07,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6d4635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:53:07, skipping insertion in model container [2021-11-12 23:53:07,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:53:06" (2/3) ... [2021-11-12 23:53:07,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6d4635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:53:07, skipping insertion in model container [2021-11-12 23:53:07,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:07" (3/3) ... [2021-11-12 23:53:07,238 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2021-11-12 23:53:07,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:53:07,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-12 23:53:07,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:53:07,314 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 [2021-11-12 23:53:07,315 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-12 23:53:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:53:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:53:07,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:07,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:53:07,354 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:07,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash 73597257, now seen corresponding path program 1 times [2021-11-12 23:53:07,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:07,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522580844] [2021-11-12 23:53:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:07,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:07,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:07,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:53:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:53:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:07,586 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 [2021-11-12 23:53:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:07,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:07,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:07,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522580844] [2021-11-12 23:53:07,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522580844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:07,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:07,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:53:07,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999178683] [2021-11-12 23:53:07,638 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:07,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:53:07,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:53:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:53:07,679 INFO L87 Difference]: Start difference. First operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2021-11-12 23:53:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:07,852 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-11-12 23:53:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:53:07,854 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 [2021-11-12 23:53:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:07,864 INFO L225 Difference]: With dead ends: 73 [2021-11-12 23:53:07,864 INFO L226 Difference]: Without dead ends: 71 [2021-11-12 23:53:07,866 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 [2021-11-12 23:53:07,869 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:07,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 8.61ms Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 110.61ms Time] [2021-11-12 23:53:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-12 23:53:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-11-12 23:53:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.631578947368421) internal successors, (62), 56 states have internal predecessors, (62), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:53:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-11-12 23:53:07,915 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 5 [2021-11-12 23:53:07,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:07,916 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-11-12 23:53:07,916 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) [2021-11-12 23:53:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-11-12 23:53:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 23:53:07,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:07,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 23:53:07,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:08,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:08,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash 73597258, now seen corresponding path program 1 times [2021-11-12 23:53:08,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:08,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766386034] [2021-11-12 23:53:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:08,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:08,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:08,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:08,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:53:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:53:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:08,233 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 [2021-11-12 23:53:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:08,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:08,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:08,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766386034] [2021-11-12 23:53:08,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766386034] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:08,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:08,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-12 23:53:08,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922581609] [2021-11-12 23:53:08,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:08,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:08,345 INFO L87 Difference]: Start difference. First operand 69 states and 80 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) [2021-11-12 23:53:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:08,581 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-11-12 23:53:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:53:08,582 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 [2021-11-12 23:53:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:08,583 INFO L225 Difference]: With dead ends: 68 [2021-11-12 23:53:08,584 INFO L226 Difference]: Without dead ends: 68 [2021-11-12 23:53:08,585 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 [2021-11-12 23:53:08,586 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:08,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 132 Invalid, 23 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 220.45ms Time] [2021-11-12 23:53:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-12 23:53:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-12 23:53:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-12 23:53:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-11-12 23:53:08,599 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 5 [2021-11-12 23:53:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:08,599 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-11-12 23:53:08,599 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) [2021-11-12 23:53:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-11-12 23:53:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:53:08,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:08,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:08,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:53:08,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:08,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting maxErr0REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -345289291, now seen corresponding path program 1 times [2021-11-12 23:53:08,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:08,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704760376] [2021-11-12 23:53:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:08,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:08,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:08,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:08,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:53:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:53:08,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:09,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:09,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:09,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704760376] [2021-11-12 23:53:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704760376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:09,261 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:09,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 23:53:09,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062413143] [2021-11-12 23:53:09,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:09,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:53:09,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:53:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:53:09,263 INFO L87 Difference]: Start difference. First operand 68 states and 79 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) [2021-11-12 23:53:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:09,417 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2021-11-12 23:53:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:53:09,418 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 [2021-11-12 23:53:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:09,420 INFO L225 Difference]: With dead ends: 83 [2021-11-12 23:53:09,422 INFO L226 Difference]: Without dead ends: 83 [2021-11-12 23:53:09,423 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 [2021-11-12 23:53:09,425 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:09,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 444 Invalid, 41 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 91.28ms Time] [2021-11-12 23:53:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-12 23:53:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-11-12 23:53:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 61 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-12 23:53:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2021-11-12 23:53:09,440 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 11 [2021-11-12 23:53:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:09,440 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2021-11-12 23:53:09,441 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) [2021-11-12 23:53:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2021-11-12 23:53:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:53:09,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:09,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:09,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:09,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:09,649 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash -159104294, now seen corresponding path program 1 times [2021-11-12 23:53:09,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:09,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228559224] [2021-11-12 23:53:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:09,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:09,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:09,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:53:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:53:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:09,762 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 [2021-11-12 23:53:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:09,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:09,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:09,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228559224] [2021-11-12 23:53:09,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228559224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:09,949 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:09,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:53:09,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629234071] [2021-11-12 23:53:09,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:09,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:53:09,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:53:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:53:09,951 INFO L87 Difference]: Start difference. First operand 76 states and 89 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) [2021-11-12 23:53:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:10,070 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-12 23:53:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:10,071 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 [2021-11-12 23:53:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:10,072 INFO L225 Difference]: With dead ends: 81 [2021-11-12 23:53:10,072 INFO L226 Difference]: Without dead ends: 81 [2021-11-12 23:53:10,073 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 [2021-11-12 23:53:10,074 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 107.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:10,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 100 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 67 Unchecked, 107.17ms Time] [2021-11-12 23:53:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-12 23:53:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-12 23:53:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 63 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-12 23:53:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-12 23:53:10,085 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 11 [2021-11-12 23:53:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:10,086 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-12 23:53:10,086 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) [2021-11-12 23:53:10,087 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-12 23:53:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:53:10,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:10,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:10,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:10,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:10,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -159104293, now seen corresponding path program 1 times [2021-11-12 23:53:10,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:10,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107498948] [2021-11-12 23:53:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:10,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:10,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:10,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:10,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:53:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:10,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:53:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:10,398 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 [2021-11-12 23:53:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:10,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:10,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:10,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107498948] [2021-11-12 23:53:10,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107498948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:10,768 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:10,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:53:10,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743173091] [2021-11-12 23:53:10,768 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:10,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:53:10,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:53:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:53:10,770 INFO L87 Difference]: Start difference. First operand 80 states and 94 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) [2021-11-12 23:53:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:11,026 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2021-11-12 23:53:11,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:53:11,027 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 [2021-11-12 23:53:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:11,028 INFO L225 Difference]: With dead ends: 82 [2021-11-12 23:53:11,028 INFO L226 Difference]: Without dead ends: 82 [2021-11-12 23:53:11,029 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 [2021-11-12 23:53:11,030 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 3 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 244.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:11,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 208 Invalid, 114 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 60 Unchecked, 244.92ms Time] [2021-11-12 23:53:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-12 23:53:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-11-12 23:53:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 63 states have internal predecessors, (70), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-12 23:53:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-11-12 23:53:11,040 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 11 [2021-11-12 23:53:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:11,041 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-11-12 23:53:11,041 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) [2021-11-12 23:53:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-11-12 23:53:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 23:53:11,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:11,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:11,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:11,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:11,243 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:11,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1041946460, now seen corresponding path program 1 times [2021-11-12 23:53:11,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:11,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924534709] [2021-11-12 23:53:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:11,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:11,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:11,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:53:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:53:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:11,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:11,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:11,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924534709] [2021-11-12 23:53:11,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924534709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:11,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:11,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-12 23:53:11,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289740780] [2021-11-12 23:53:11,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:11,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:53:11,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:53:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:53:11,660 INFO L87 Difference]: Start difference. First operand 80 states and 93 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) [2021-11-12 23:53:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:11,780 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-11-12 23:53:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:53:11,781 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 [2021-11-12 23:53:11,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:11,782 INFO L225 Difference]: With dead ends: 91 [2021-11-12 23:53:11,782 INFO L226 Difference]: Without dead ends: 91 [2021-11-12 23:53:11,783 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 [2021-11-12 23:53:11,784 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:11,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 444 Invalid, 40 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 66.69ms Time] [2021-11-12 23:53:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-12 23:53:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-11-12 23:53:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.48) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-12 23:53:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-11-12 23:53:11,796 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 17 [2021-11-12 23:53:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:11,797 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-11-12 23:53:11,797 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) [2021-11-12 23:53:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-11-12 23:53:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 23:53:11,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:11,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:11,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:12,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:12,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr4REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1725611983, now seen corresponding path program 1 times [2021-11-12 23:53:12,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:12,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495924957] [2021-11-12 23:53:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:12,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:12,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:12,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:12,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:53:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:53:12,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:12,120 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 [2021-11-12 23:53:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:53:12,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:53:12,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495924957] [2021-11-12 23:53:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495924957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:12,343 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:12,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:53:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419523307] [2021-11-12 23:53:12,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:12,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:53:12,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:53:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:53:12,346 INFO L87 Difference]: Start difference. First operand 86 states and 99 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) [2021-11-12 23:53:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:12,454 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-11-12 23:53:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:12,455 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 [2021-11-12 23:53:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:12,456 INFO L225 Difference]: With dead ends: 91 [2021-11-12 23:53:12,457 INFO L226 Difference]: Without dead ends: 91 [2021-11-12 23:53:12,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:53:12,458 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 99.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:12,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 145 Invalid, 100 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 66 Unchecked, 99.87ms Time] [2021-11-12 23:53:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-12 23:53:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-12 23:53:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.490566037735849) internal successors, (79), 69 states have internal predecessors, (79), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (14), 13 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-12 23:53:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2021-11-12 23:53:12,468 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 21 [2021-11-12 23:53:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:12,468 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2021-11-12 23:53:12,468 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) [2021-11-12 23:53:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2021-11-12 23:53:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 23:53:12,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:12,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:12,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:12,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:12,684 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr5REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1725611984, now seen corresponding path program 1 times [2021-11-12 23:53:12,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:12,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706234144] [2021-11-12 23:53:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:12,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:12,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:12,687 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:12,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:53:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:53:12,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:12,794 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 [2021-11-12 23:53:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:53:12,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:53:13,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:13,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706234144] [2021-11-12 23:53:13,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706234144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:13,490 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:13,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 23:53:13,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630242800] [2021-11-12 23:53:13,491 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:13,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:53:13,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:13,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:53:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:53:13,492 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:53:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:14,064 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2021-11-12 23:53:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:53:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2021-11-12 23:53:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:14,067 INFO L225 Difference]: With dead ends: 96 [2021-11-12 23:53:14,067 INFO L226 Difference]: Without dead ends: 96 [2021-11-12 23:53:14,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:53:14,068 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 482.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 554.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:14,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 106 Invalid, 211 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 24 Unchecked, 554.57ms Time] [2021-11-12 23:53:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-12 23:53:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-12 23:53:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 71 states have internal predecessors, (81), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-12 23:53:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2021-11-12 23:53:14,078 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 21 [2021-11-12 23:53:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:14,079 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2021-11-12 23:53:14,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 23:53:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2021-11-12 23:53:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:53:14,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:14,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:14,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:14,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:14,294 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash -868680531, now seen corresponding path program 1 times [2021-11-12 23:53:14,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:14,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413607279] [2021-11-12 23:53:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:14,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:14,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:14,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:53:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:53:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:14,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:53:14,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:14,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413607279] [2021-11-12 23:53:14,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413607279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:14,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:14,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:53:14,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27852042] [2021-11-12 23:53:14,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:14,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:53:14,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:53:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:14,494 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:53:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:14,740 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-11-12 23:53:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:53:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-12 23:53:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:14,742 INFO L225 Difference]: With dead ends: 95 [2021-11-12 23:53:14,742 INFO L226 Difference]: Without dead ends: 79 [2021-11-12 23:53:14,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:53:14,743 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.48ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:14,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 112 Unknown, 0 Unchecked, 3.48ms Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 234.54ms Time] [2021-11-12 23:53:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-12 23:53:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-12 23:53:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 61 states have internal predecessors, (71), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-12 23:53:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-11-12 23:53:14,751 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 20 [2021-11-12 23:53:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:14,752 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-11-12 23:53:14,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:53:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-11-12 23:53:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 23:53:14,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:14,754 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:14,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:14,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:14,967 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting nondet_treeErr2REQUIRES_VIOLATION === [maxErr0REQUIRES_VIOLATION, maxErr1REQUIRES_VIOLATION, maxErr2REQUIRES_VIOLATION, maxErr3REQUIRES_VIOLATION, maxErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-12 23:53:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1828073472, now seen corresponding path program 1 times [2021-11-12 23:53:14,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:14,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127818307] [2021-11-12 23:53:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:14,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:14,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:14,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:53:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:53:15,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:15,218 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 [2021-11-12 23:53:15,427 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-12 23:53:15,428 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 [2021-11-12 23:53:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:53:15,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:21,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:21,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127818307] [2021-11-12 23:53:21,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_nondet_tree_~n~0.base_BEFORE_CALL_14] [2021-11-12 23:53:21,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1876959869] [2021-11-12 23:53:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:21,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:21,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:21,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:21,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:53:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:53:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:22,020 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 [2021-11-12 23:53:26,252 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-12 23:53:26,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-12 23:53:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 23:53:26,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:28,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_nondet_tree_~n~0.base_BEFORE_CALL_16] [2021-11-12 23:53:28,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672859444] [2021-11-12 23:53:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:28,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:53:28,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:53:28,463 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:53:28,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:53:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:53:28,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:28,778 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-12 23:53:28,778 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 23 treesize of output 30 [2021-11-12 23:53:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:53:28,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:35,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [v_nondet_tree_~n~0.base_BEFORE_CALL_14] [2021-11-12 23:53:35,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:35,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 23:53:35,499 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-12 23:53:35,499 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 23:53:35,505 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr2REQUIRES_VIOLATION (19 of 20 remaining) [2021-11-12 23:53:35,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location maxErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-12 23:53:35,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location maxErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-12 23:53:35,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location maxErr2REQUIRES_VIOLATION (16 of 20 remaining) [2021-11-12 23:53:35,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location maxErr3REQUIRES_VIOLATION (15 of 20 remaining) [2021-11-12 23:53:35,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location maxErr4REQUIRES_VIOLATION (14 of 20 remaining) [2021-11-12 23:53:35,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location maxErr5REQUIRES_VIOLATION (13 of 20 remaining) [2021-11-12 23:53:35,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr0REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-12 23:53:35,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr1REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-12 23:53:35,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr3REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-12 23:53:35,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr4REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-12 23:53:35,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location nondet_treeErr5REQUIRES_VIOLATION (8 of 20 remaining) [2021-11-12 23:53:35,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (7 of 20 remaining) [2021-11-12 23:53:35,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr0REQUIRES_VIOLATION (6 of 20 remaining) [2021-11-12 23:53:35,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr1REQUIRES_VIOLATION (5 of 20 remaining) [2021-11-12 23:53:35,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 20 remaining) [2021-11-12 23:53:35,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr3REQUIRES_VIOLATION (3 of 20 remaining) [2021-11-12 23:53:35,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr4REQUIRES_VIOLATION (2 of 20 remaining) [2021-11-12 23:53:35,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr5REQUIRES_VIOLATION (1 of 20 remaining) [2021-11-12 23:53:35,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location checkErr6REQUIRES_VIOLATION (0 of 20 remaining) [2021-11-12 23:53:35,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:35,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:35,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:36,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:36,127 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:53:36,130 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:53:36,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:53:36 BoogieIcfgContainer [2021-11-12 23:53:36,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:53:36,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:53:36,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:53:36,144 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:53:36,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:53:07" (3/4) ... [2021-11-12 23:53:36,147 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:53:36,147 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:53:36,148 INFO L158 Benchmark]: Toolchain (without parser) took 30032.05ms. Allocated memory was 58.7MB in the beginning and 111.1MB in the end (delta: 52.4MB). Free memory was 37.2MB in the beginning and 39.2MB in the end (delta: -2.1MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. [2021-11-12 23:53:36,149 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory was 39.4MB in the beginning and 39.3MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:53:36,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 381.64ms. Allocated memory is still 58.7MB. Free memory was 37.0MB in the beginning and 40.7MB in the end (delta: -3.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:53:36,149 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.63ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 39.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:53:36,150 INFO L158 Benchmark]: Boogie Preprocessor took 66.93ms. Allocated memory is still 58.7MB. Free memory was 39.0MB in the beginning and 37.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:53:36,150 INFO L158 Benchmark]: RCFGBuilder took 611.39ms. Allocated memory was 58.7MB in the beginning and 83.9MB in the end (delta: 25.2MB). Free memory was 37.6MB in the beginning and 62.3MB in the end (delta: -24.7MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2021-11-12 23:53:36,151 INFO L158 Benchmark]: TraceAbstraction took 28911.88ms. Allocated memory was 83.9MB in the beginning and 111.1MB in the end (delta: 27.3MB). Free memory was 61.7MB in the beginning and 39.6MB in the end (delta: 22.0MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2021-11-12 23:53:36,151 INFO L158 Benchmark]: Witness Printer took 4.04ms. Allocated memory is still 111.1MB. Free memory is still 39.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:53:36,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 58.7MB. Free memory was 39.4MB in the beginning and 39.3MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 381.64ms. Allocated memory is still 58.7MB. Free memory was 37.0MB in the beginning and 40.7MB in the end (delta: -3.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.63ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 39.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 66.93ms. Allocated memory is still 58.7MB. Free memory was 39.0MB in the beginning and 37.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 611.39ms. Allocated memory was 58.7MB in the beginning and 83.9MB in the end (delta: 25.2MB). Free memory was 37.6MB in the beginning and 62.3MB in the end (delta: -24.7MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. * TraceAbstraction took 28911.88ms. Allocated memory was 83.9MB in the beginning and 111.1MB in the end (delta: 27.3MB). Free memory was 61.7MB in the beginning and 39.6MB in the end (delta: 22.0MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. * Witness Printer took 4.04ms. Allocated memory is still 111.1MB. Free memory is still 39.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L66] CALL nondet_tree() [L24] COND FALSE !(__VERIFIER_nondet_bool()) [L27] struct node *n = (struct node *)malloc(sizeof(struct node)); [L28] n->data = __VERIFIER_nondet_int() [L29] CALL, EXPR nondet_tree() [L24] COND TRUE __VERIFIER_nondet_bool() [L25] return 0; [L29] RET, EXPR nondet_tree() [L29] n->left = nondet_tree() [L30] CALL, EXPR nondet_tree() [L24] COND FALSE !(__VERIFIER_nondet_bool()) [L27] struct node *n = (struct node *)malloc(sizeof(struct node)); [L28] n->data = __VERIFIER_nondet_int() [L29] CALL, EXPR nondet_tree() [L24] COND FALSE !(__VERIFIER_nondet_bool()) [L27] struct node *n = (struct node *)malloc(sizeof(struct node)); [L28] n->data = __VERIFIER_nondet_int() [L29] CALL, EXPR nondet_tree() [L24] COND TRUE __VERIFIER_nondet_bool() [L25] return 0; [L29] RET, EXPR nondet_tree() [L29] n->left = nondet_tree() [L30] CALL, EXPR nondet_tree() [L24] COND TRUE __VERIFIER_nondet_bool() [L25] return 0; [L30] RET, EXPR nondet_tree() [L30] n->right = nondet_tree() [L31] return n; [L29] RET, EXPR nondet_tree() [L29] n->left = nondet_tree() - UnprovableResult [Line: 39]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 39]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 40]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 30]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 65]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 50]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 50]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 15]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 53]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 55]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 55]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 72 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 28.8s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 140 SdHoareTripleChecker+Valid, 1730.11ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 132 mSDsluCounter, 1843 SdHoareTripleChecker+Invalid, 1468.95ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 217 IncrementalHoareTripleChecker+Unchecked, 1167 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 521 IncrementalHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 676 mSDtfsCounter, 521 mSolverCounterSat, 35.59ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 230 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=8, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 260 ConstructedInterpolants, 29 QuantifiedInterpolants, 1471 SizeOfPredicates, 13 NumberOfNonLiveVariables, 813 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 19 InterpolantComputations, 18 PerfectInterpolantSequences, 81/89 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 23:53:36,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46bd73e0-a489-4abb-9665-710fc27f2403/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN