./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/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_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a17e1f9edfd37607fb472869452b377d4af1281c9808dec0371b4f943952037 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:28:04,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:28:04,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:28:04,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:28:04,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:28:04,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:28:04,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:28:04,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:28:04,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:28:04,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:28:04,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:28:04,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:28:04,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:28:04,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:28:04,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:28:04,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:28:04,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:28:04,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:28:04,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:28:04,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:28:04,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:28:04,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:28:04,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:28:04,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:28:04,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:28:04,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:28:04,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:28:04,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:28:04,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:28:04,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:28:04,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:28:04,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:28:04,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:28:04,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:28:04,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:28:04,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:28:04,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:28:04,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:28:04,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:28:04,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:28:04,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:28:04,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:28:04,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:28:04,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:28:04,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:28:04,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:28:04,542 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:28:04,542 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:28:04,542 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:28:04,542 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:28:04,542 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:28:04,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:28:04,543 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:28:04,543 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:28:04,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:28:04,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:28:04,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:28:04,544 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:28:04,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:28:04,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:28:04,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:28:04,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:28:04,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:28:04,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:28:04,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:28:04,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:28:04,546 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:28:04,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:28:04,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:28:04,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:28:04,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:28:04,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:28:04,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:28:04,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:04,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:28:04,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:28:04,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:28:04,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:28:04,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:28:04,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:28:04,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:28:04,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:28:04,549 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a17e1f9edfd37607fb472869452b377d4af1281c9808dec0371b4f943952037 [2021-11-13 02:28:04,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:28:04,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:28:04,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:28:04,877 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:28:04,878 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:28:04,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i [2021-11-13 02:28:04,950 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/2d3ccca30/f259b894875a4f51922fc4ee9824ff36/FLAG4b68155f8 [2021-11-13 02:28:05,575 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:05,580 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i [2021-11-13 02:28:05,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/2d3ccca30/f259b894875a4f51922fc4ee9824ff36/FLAG4b68155f8 [2021-11-13 02:28:05,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/2d3ccca30/f259b894875a4f51922fc4ee9824ff36 [2021-11-13 02:28:05,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:05,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:05,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:05,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:05,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:05,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:05" (1/1) ... [2021-11-13 02:28:05,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458bd5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:05, skipping insertion in model container [2021-11-13 02:28:05,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:05" (1/1) ... [2021-11-13 02:28:05,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:05,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:06,379 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[33021,33034] [2021-11-13 02:28:06,558 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[49681,49694] [2021-11-13 02:28:06,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:06,591 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) [2021-11-13 02:28:06,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42b4b0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:06, skipping insertion in model container [2021-11-13 02:28:06,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:06,592 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:28:06,594 INFO L158 Benchmark]: Toolchain (without parser) took 812.80ms. Allocated memory is still 109.1MB. Free memory was 66.0MB in the beginning and 69.2MB in the end (delta: -3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:28:06,595 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 85.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:28:06,596 INFO L158 Benchmark]: CACSL2BoogieTranslator took 806.87ms. Allocated memory is still 109.1MB. Free memory was 65.8MB in the beginning and 69.2MB in the end (delta: -3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:28:06,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory is still 85.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 806.87ms. Allocated memory is still 109.1MB. Free memory was 65.8MB in the beginning and 69.2MB in the end (delta: -3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/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_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a17e1f9edfd37607fb472869452b377d4af1281c9808dec0371b4f943952037 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:28:08,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:28:08,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:28:08,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:28:08,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:28:08,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:28:08,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:28:08,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:28:08,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:28:08,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:28:08,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:28:08,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:28:08,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:28:08,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:28:08,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:28:08,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:28:08,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:28:08,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:28:08,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:28:08,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:28:08,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:28:08,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:28:08,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:28:08,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:28:08,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:28:08,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:28:08,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:28:08,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:28:08,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:28:08,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:28:08,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:28:08,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:28:08,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:28:08,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:28:09,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:28:09,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:28:09,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:28:09,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:28:09,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:28:09,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:28:09,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:28:09,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:28:09,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:28:09,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:28:09,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:28:09,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:28:09,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:28:09,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:28:09,065 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:28:09,066 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:28:09,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:28:09,066 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:28:09,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:28:09,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:28:09,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:28:09,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:28:09,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:28:09,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:28:09,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:28:09,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:28:09,071 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:28:09,071 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:28:09,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:28:09,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:28:09,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:28:09,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:28:09,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:28:09,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:28:09,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:28:09,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:09,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:28:09,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:28:09,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:28:09,074 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:28:09,074 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:09,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:28:09,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:28:09,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:28:09,075 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a17e1f9edfd37607fb472869452b377d4af1281c9808dec0371b4f943952037 [2021-11-13 02:28:09,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:28:09,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:28:09,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:28:09,539 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:28:09,541 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:28:09,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i [2021-11-13 02:28:09,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/27168e707/a60470e9126d478aa55021e83fb7980c/FLAG2ff5ddf7c [2021-11-13 02:28:10,286 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:10,287 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i [2021-11-13 02:28:10,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/27168e707/a60470e9126d478aa55021e83fb7980c/FLAG2ff5ddf7c [2021-11-13 02:28:10,494 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/data/27168e707/a60470e9126d478aa55021e83fb7980c [2021-11-13 02:28:10,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:10,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:10,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:10,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:10,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:10,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:10" (1/1) ... [2021-11-13 02:28:10,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1923cb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:10, skipping insertion in model container [2021-11-13 02:28:10,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:10" (1/1) ... [2021-11-13 02:28:10,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:10,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:11,109 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[33021,33034] [2021-11-13 02:28:11,251 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[49681,49694] [2021-11-13 02:28:11,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:11,296 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:28:11,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:11,363 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[33021,33034] [2021-11-13 02:28:11,463 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[49681,49694] [2021-11-13 02:28:11,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:11,471 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:28:11,526 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[33021,33034] [2021-11-13 02:28:11,600 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_e0e69b47-b500-4eeb-ac3e-a5714932b098/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test5-1.i[49681,49694] [2021-11-13 02:28:11,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:11,662 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:28:11,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11 WrapperNode [2021-11-13 02:28:11,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:11,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:11,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:28:11,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:28:11,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:11,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:28:11,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:28:11,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:28:11,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:11,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:12,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:28:12,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:28:12,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:28:12,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:28:12,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (1/1) ... [2021-11-13 02:28:12,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:12,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:28:12,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:28:12,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:28:12,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:28:12,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:28:12,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:28:12,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 02:28:12,099 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 02:28:12,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:28:12,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:28:12,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:28:12,100 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 02:28:12,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:28:12,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:28:12,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:28:12,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:28:12,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:28:12,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:28:23,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:28:23,576 INFO L299 CfgBuilder]: Removed 83 assume(true) statements. [2021-11-13 02:28:23,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:23 BoogieIcfgContainer [2021-11-13 02:28:23,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:28:23,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:28:23,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:28:23,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:28:23,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:28:10" (1/3) ... [2021-11-13 02:28:23,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d04e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:23, skipping insertion in model container [2021-11-13 02:28:23,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:11" (2/3) ... [2021-11-13 02:28:23,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d04e572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:23, skipping insertion in model container [2021-11-13 02:28:23,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:23" (3/3) ... [2021-11-13 02:28:23,586 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test5-1.i [2021-11-13 02:28:23,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:28:23,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 02:28:23,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:28:23,643 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-13 02:28:23,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 02:28:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:28:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 02:28:23,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:23,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:23,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-13 02:28:23,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:23,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747323169] [2021-11-13 02:28:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:23,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:23,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:23,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:28:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:28:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:23,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:24,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:24,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747323169] [2021-11-13 02:28:24,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747323169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:24,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:24,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:28:24,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212569939] [2021-11-13 02:28:24,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:24,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:28:24,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:28:24,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:28:24,051 INFO L87 Difference]: Start difference. First operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:24,163 INFO L93 Difference]: Finished difference Result 514 states and 869 transitions. [2021-11-13 02:28:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:28:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 02:28:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:24,188 INFO L225 Difference]: With dead ends: 514 [2021-11-13 02:28:24,191 INFO L226 Difference]: Without dead ends: 254 [2021-11-13 02:28:24,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:28:24,205 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:24,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 6.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:28:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-13 02:28:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-13 02:28:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 02:28:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-13 02:28:24,262 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-13 02:28:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:24,262 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-13 02:28:24,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-13 02:28:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 02:28:24,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:24,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:24,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:24,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-13 02:28:24,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:24,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897134773] [2021-11-13 02:28:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:24,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:24,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:24,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:28:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:28:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:24,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:25,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:25,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897134773] [2021-11-13 02:28:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897134773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:25,063 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:25,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:28:25,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917959101] [2021-11-13 02:28:25,064 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:25,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:25,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:25,066 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:25,428 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-13 02:28:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:25,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-13 02:28:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:25,434 INFO L225 Difference]: With dead ends: 575 [2021-11-13 02:28:25,434 INFO L226 Difference]: Without dead ends: 497 [2021-11-13 02:28:25,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:25,437 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 600 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 284.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.25ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.33ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:25,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 687 Invalid, 30 Unknown, 0 Unchecked, 9.25ms Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 314.33ms Time] [2021-11-13 02:28:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-13 02:28:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-13 02:28:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 02:28:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-13 02:28:25,512 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-13 02:28:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:25,512 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-13 02:28:25,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-13 02:28:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 02:28:25,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:25,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:25,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:25,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:25,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-13 02:28:25,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:25,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798649651] [2021-11-13 02:28:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:25,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:25,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:25,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:25,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:28:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:28:27,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:28:27,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:27,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798649651] [2021-11-13 02:28:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798649651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:27,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:27,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 02:28:27,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927593055] [2021-11-13 02:28:27,634 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:27,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:27,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:27,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:27,636 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:27,762 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-13 02:28:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-13 02:28:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:27,766 INFO L225 Difference]: With dead ends: 850 [2021-11-13 02:28:27,766 INFO L226 Difference]: Without dead ends: 433 [2021-11-13 02:28:27,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:27,770 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:27,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 91.87ms Time] [2021-11-13 02:28:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-13 02:28:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-13 02:28:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 02:28:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-13 02:28:27,795 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-13 02:28:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:27,796 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-13 02:28:27,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:27,796 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-13 02:28:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 02:28:27,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:27,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:27,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:28,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:28,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-13 02:28:28,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:28,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764466469] [2021-11-13 02:28:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:28,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:28,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:28,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:28,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:28:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:28:29,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:28:30,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:30,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764466469] [2021-11-13 02:28:30,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764466469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:30,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:30,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:28:30,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387664083] [2021-11-13 02:28:30,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:30,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:30,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:30,084 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:30,288 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-13 02:28:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-13 02:28:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:30,298 INFO L225 Difference]: With dead ends: 807 [2021-11-13 02:28:30,298 INFO L226 Difference]: Without dead ends: 429 [2021-11-13 02:28:30,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:30,301 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.27ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:30,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 183.27ms Time] [2021-11-13 02:28:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-13 02:28:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-13 02:28:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 02:28:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-13 02:28:30,323 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-13 02:28:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:30,324 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-13 02:28:30,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-13 02:28:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-13 02:28:30,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:30,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:30,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:30,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:30,551 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1057265950, now seen corresponding path program 1 times [2021-11-13 02:28:30,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:30,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069420326] [2021-11-13 02:28:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:30,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:30,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:30,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:28:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 02:28:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:28:32,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:32,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069420326] [2021-11-13 02:28:32,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069420326] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:32,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:32,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 02:28:32,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324453872] [2021-11-13 02:28:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:32,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:32,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:32,216 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:28:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:32,309 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-13 02:28:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-13 02:28:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:32,313 INFO L225 Difference]: With dead ends: 814 [2021-11-13 02:28:32,313 INFO L226 Difference]: Without dead ends: 432 [2021-11-13 02:28:32,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:28:32,315 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.79ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:32,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 2.79ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 61.79ms Time] [2021-11-13 02:28:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-13 02:28:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-13 02:28:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-13 02:28:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-13 02:28:32,337 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-13 02:28:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:32,337 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-13 02:28:32,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:28:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-13 02:28:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 02:28:32,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:32,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:32,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:32,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:32,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1605231932, now seen corresponding path program 1 times [2021-11-13 02:28:32,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:32,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049511020] [2021-11-13 02:28:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:32,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:32,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:32,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:32,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:28:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:33,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:28:33,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:28:34,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:34,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049511020] [2021-11-13 02:28:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049511020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:34,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582223803] [2021-11-13 02:28:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:34,276 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:34,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:34,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:34,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 02:28:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:28:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:28:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 02:28:36,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582223803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:36,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:36,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-13 02:28:36,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796896071] [2021-11-13 02:28:36,408 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:36,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:28:36,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:28:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:28:36,410 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:36,585 INFO L93 Difference]: Finished difference Result 810 states and 1058 transitions. [2021-11-13 02:28:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-13 02:28:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:36,590 INFO L225 Difference]: With dead ends: 810 [2021-11-13 02:28:36,590 INFO L226 Difference]: Without dead ends: 478 [2021-11-13 02:28:36,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:28:36,592 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 45 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.24ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:36,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 593 Invalid, 138 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [86 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 150.24ms Time] [2021-11-13 02:28:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-13 02:28:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 472. [2021-11-13 02:28:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 450 states have (on average 1.24) internal successors, (558), 457 states have internal predecessors, (558), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-13 02:28:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 596 transitions. [2021-11-13 02:28:36,614 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 596 transitions. Word has length 255 [2021-11-13 02:28:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:36,614 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 596 transitions. [2021-11-13 02:28:36,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 596 transitions. [2021-11-13 02:28:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 02:28:36,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:36,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:36,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:36,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:28:37,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash -417608896, now seen corresponding path program 1 times [2021-11-13 02:28:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:37,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102558458] [2021-11-13 02:28:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:37,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:37,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:37,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:37,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:28:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:37,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:28:38,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:28:38,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:38,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102558458] [2021-11-13 02:28:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102558458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:38,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792331082] [2021-11-13 02:28:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:38,578 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:38,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:38,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 02:28:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:28:39,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 02:28:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1792331082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:40,352 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:40,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:28:40,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731407462] [2021-11-13 02:28:40,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:40,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:40,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:28:40,355 INFO L87 Difference]: Start difference. First operand 472 states and 596 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:41,335 INFO L93 Difference]: Finished difference Result 1026 states and 1310 transitions. [2021-11-13 02:28:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:41,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-13 02:28:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:41,341 INFO L225 Difference]: With dead ends: 1026 [2021-11-13 02:28:41,341 INFO L226 Difference]: Without dead ends: 748 [2021-11-13 02:28:41,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:28:41,343 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 233 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 926.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 952.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:41,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 765 Invalid, 19 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 952.97ms Time] [2021-11-13 02:28:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-13 02:28:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-11-13 02:28:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 714 states have (on average 1.2478991596638656) internal successors, (891), 726 states have internal predecessors, (891), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-13 02:28:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 952 transitions. [2021-11-13 02:28:41,378 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 952 transitions. Word has length 255 [2021-11-13 02:28:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:41,379 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 952 transitions. [2021-11-13 02:28:41,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 952 transitions. [2021-11-13 02:28:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-13 02:28:41,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:41,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:41,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:41,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:41,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:41,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash 806527916, now seen corresponding path program 1 times [2021-11-13 02:28:41,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:41,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437459892] [2021-11-13 02:28:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:41,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:41,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:41,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:28:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 02:28:42,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:28:43,329 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:43,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437459892] [2021-11-13 02:28:43,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437459892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:43,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508138295] [2021-11-13 02:28:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:43,330 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:43,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:43,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 02:28:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:28:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-13 02:28:45,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-13 02:28:46,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1508138295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:46,840 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:46,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:28:46,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595306163] [2021-11-13 02:28:46,841 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:46,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:46,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:28:46,843 INFO L87 Difference]: Start difference. First operand 746 states and 952 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:47,163 INFO L93 Difference]: Finished difference Result 1054 states and 1345 transitions. [2021-11-13 02:28:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-13 02:28:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:47,169 INFO L225 Difference]: With dead ends: 1054 [2021-11-13 02:28:47,169 INFO L226 Difference]: Without dead ends: 745 [2021-11-13 02:28:47,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:28:47,171 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 93 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 293.16ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:47,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 293.16ms Time] [2021-11-13 02:28:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-13 02:28:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-11-13 02:28:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 712 states have (on average 1.2485955056179776) internal successors, (889), 724 states have internal predecessors, (889), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 02:28:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 947 transitions. [2021-11-13 02:28:47,203 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 947 transitions. Word has length 262 [2021-11-13 02:28:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:47,203 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 947 transitions. [2021-11-13 02:28:47,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 02:28:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 947 transitions. [2021-11-13 02:28:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 02:28:47,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:47,209 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:47,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:47,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:47,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:47,623 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2097064427, now seen corresponding path program 1 times [2021-11-13 02:28:47,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:47,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212731737] [2021-11-13 02:28:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:47,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:47,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:47,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:28:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:28:48,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:28:49,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:49,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212731737] [2021-11-13 02:28:49,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212731737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:49,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362855767] [2021-11-13 02:28:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:49,247 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:49,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:49,248 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:49,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 02:28:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:28:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 02:28:50,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 02:28:50,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362855767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:50,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:50,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-13 02:28:50,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125777534] [2021-11-13 02:28:50,738 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:28:50,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:28:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:28:50,740 INFO L87 Difference]: Start difference. First operand 743 states and 947 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:28:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:50,953 INFO L93 Difference]: Finished difference Result 961 states and 1255 transitions. [2021-11-13 02:28:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-13 02:28:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:50,961 INFO L225 Difference]: With dead ends: 961 [2021-11-13 02:28:50,962 INFO L226 Difference]: Without dead ends: 806 [2021-11-13 02:28:50,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:28:50,965 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 27 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:50,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 880 Invalid, 145 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [69 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 174.78ms Time] [2021-11-13 02:28:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-13 02:28:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 803. [2021-11-13 02:28:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 772 states have (on average 1.2292746113989637) internal successors, (949), 784 states have internal predecessors, (949), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 02:28:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1007 transitions. [2021-11-13 02:28:50,996 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1007 transitions. Word has length 279 [2021-11-13 02:28:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:50,997 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1007 transitions. [2021-11-13 02:28:50,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:28:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1007 transitions. [2021-11-13 02:28:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 02:28:51,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:51,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:51,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:51,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:51,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:51,424 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 710861033, now seen corresponding path program 1 times [2021-11-13 02:28:51,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:51,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907436032] [2021-11-13 02:28:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:51,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:51,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:51,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:51,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:28:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:52,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:28:52,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:28:53,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:53,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907436032] [2021-11-13 02:28:53,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907436032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:53,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888049780] [2021-11-13 02:28:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:53,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:53,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:53,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 02:28:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:28:53,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 02:28:54,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 02:28:54,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888049780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:54,669 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:54,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-13 02:28:54,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378259755] [2021-11-13 02:28:54,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:54,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:28:54,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:28:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:28:54,672 INFO L87 Difference]: Start difference. First operand 803 states and 1007 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:54,854 INFO L93 Difference]: Finished difference Result 1466 states and 1855 transitions. [2021-11-13 02:28:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-13 02:28:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:54,858 INFO L225 Difference]: With dead ends: 1466 [2021-11-13 02:28:54,858 INFO L226 Difference]: Without dead ends: 755 [2021-11-13 02:28:54,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:28:54,860 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 282 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.66ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:54,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1534 Invalid, 115 Unknown, 0 Unchecked, 4.66ms Time], IncrementalHoareTripleChecker [28 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 149.87ms Time] [2021-11-13 02:28:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-13 02:28:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2021-11-13 02:28:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.1997226074895977) internal successors, (865), 733 states have internal predecessors, (865), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 02:28:54,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 923 transitions. [2021-11-13 02:28:54,890 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 923 transitions. Word has length 279 [2021-11-13 02:28:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:54,891 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 923 transitions. [2021-11-13 02:28:54,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 923 transitions. [2021-11-13 02:28:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 02:28:54,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:54,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:54,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:55,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:55,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:55,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash 981361769, now seen corresponding path program 1 times [2021-11-13 02:28:55,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:55,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939339061] [2021-11-13 02:28:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:55,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:55,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:55,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 02:28:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:28:56,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:28:57,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:28:57,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939339061] [2021-11-13 02:28:57,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939339061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:57,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282225871] [2021-11-13 02:28:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:57,014 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:28:57,029 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:28:57,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 02:28:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 02:28:57,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 02:28:58,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282225871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:58,355 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:58,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-13 02:28:58,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169465160] [2021-11-13 02:28:58,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:58,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:58,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:28:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:28:58,358 INFO L87 Difference]: Start difference. First operand 752 states and 923 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:28:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:58,461 INFO L93 Difference]: Finished difference Result 931 states and 1165 transitions. [2021-11-13 02:28:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-13 02:28:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:58,467 INFO L225 Difference]: With dead ends: 931 [2021-11-13 02:28:58,467 INFO L226 Difference]: Without dead ends: 708 [2021-11-13 02:28:58,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:28:58,468 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 150 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:58,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 788 Invalid, 77 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [39 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 73.15ms Time] [2021-11-13 02:28:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-13 02:28:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 701. [2021-11-13 02:28:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 670 states have (on average 1.1656716417910449) internal successors, (781), 682 states have internal predecessors, (781), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 02:28:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 839 transitions. [2021-11-13 02:28:58,499 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 839 transitions. Word has length 279 [2021-11-13 02:28:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:58,499 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 839 transitions. [2021-11-13 02:28:58,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:28:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 839 transitions. [2021-11-13 02:28:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 02:28:58,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:58,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:58,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:58,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:58,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:28:58,926 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1404801929, now seen corresponding path program 1 times [2021-11-13 02:28:58,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:28:58,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007026534] [2021-11-13 02:28:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:58,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:28:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:28:58,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:28:58,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 02:28:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:59,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:28:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:28:59,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:29:00,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:00,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007026534] [2021-11-13 02:29:00,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007026534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:00,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007869947] [2021-11-13 02:29:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:00,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:29:00,525 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:29:00,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 02:29:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:29:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 02:29:01,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 02:29:02,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007869947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:02,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663208738] [2021-11-13 02:29:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:02,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:02,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:02,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:02,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 02:29:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:29:02,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:29:03,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:29:04,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663208738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:04,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:29:04,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-13 02:29:04,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982869632] [2021-11-13 02:29:04,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:04,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:29:04,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:29:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:29:04,448 INFO L87 Difference]: Start difference. First operand 701 states and 839 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 02:29:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:07,075 INFO L93 Difference]: Finished difference Result 2955 states and 3656 transitions. [2021-11-13 02:29:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 02:29:07,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-13 02:29:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:07,088 INFO L225 Difference]: With dead ends: 2955 [2021-11-13 02:29:07,089 INFO L226 Difference]: Without dead ends: 2301 [2021-11-13 02:29:07,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:29:07,091 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 2357 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2094.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.01ms SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2320.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:07,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2408 Valid, 4524 Invalid, 673 Unknown, 0 Unchecked, 17.01ms Time], IncrementalHoareTripleChecker [228 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 2320.06ms Time] [2021-11-13 02:29:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-13 02:29:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1947. [2021-11-13 02:29:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1878 states have (on average 1.174653887113951) internal successors, (2206), 1890 states have internal predecessors, (2206), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-13 02:29:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2353 transitions. [2021-11-13 02:29:07,176 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2353 transitions. Word has length 279 [2021-11-13 02:29:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:07,177 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 2353 transitions. [2021-11-13 02:29:07,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 02:29:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2353 transitions. [2021-11-13 02:29:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-13 02:29:07,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:07,188 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:07,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:07,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:07,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:07,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:29:07,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1514981865, now seen corresponding path program 2 times [2021-11-13 02:29:07,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:07,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340764252] [2021-11-13 02:29:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:29:07,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:07,807 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:07,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:29:09,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:29:09,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:09,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:29:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 02:29:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 02:29:11,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:29:11,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340764252] [2021-11-13 02:29:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340764252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:11,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1137321333] [2021-11-13 02:29:11,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:29:11,884 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:29:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:29:11,885 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:29:11,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 02:29:14,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:29:14,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:14,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:29:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 02:29:15,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 02:29:17,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1137321333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:17,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41562174] [2021-11-13 02:29:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:29:17,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:17,159 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:17,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 02:29:18,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:29:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:29:18,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-13 02:29:19,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-13 02:29:20,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41562174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:20,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:29:20,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-13 02:29:20,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244099671] [2021-11-13 02:29:20,636 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:20,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 02:29:20,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:29:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 02:29:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:29:20,639 INFO L87 Difference]: Start difference. First operand 1947 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:29:22,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:22,002 INFO L93 Difference]: Finished difference Result 3873 states and 4886 transitions. [2021-11-13 02:29:22,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 02:29:22,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-13 02:29:22,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:22,014 INFO L225 Difference]: With dead ends: 3873 [2021-11-13 02:29:22,014 INFO L226 Difference]: Without dead ends: 1967 [2021-11-13 02:29:22,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 02:29:22,021 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 137 mSDsluCounter, 2924 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 496.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3225 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.58ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 567.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:22,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 3225 Invalid, 396 Unknown, 0 Unchecked, 5.58ms Time], IncrementalHoareTripleChecker [85 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 567.02ms Time] [2021-11-13 02:29:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-13 02:29:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1959. [2021-11-13 02:29:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1890 states have (on average 1.1756613756613756) internal successors, (2222), 1902 states have internal predecessors, (2222), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-13 02:29:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2369 transitions. [2021-11-13 02:29:22,099 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2369 transitions. Word has length 679 [2021-11-13 02:29:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:22,100 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2369 transitions. [2021-11-13 02:29:22,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:29:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2369 transitions. [2021-11-13 02:29:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-13 02:29:22,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:22,111 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:22,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:22,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:22,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-13 02:29:22,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:22,725 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2053878807, now seen corresponding path program 3 times [2021-11-13 02:29:22,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:29:22,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047837558] [2021-11-13 02:29:22,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:29:22,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:29:22,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:29:22,729 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:29:22,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e69b47-b500-4eeb-ac3e-a5714932b098/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process