./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c --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_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/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_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/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_56b2769a-c068-4190-a20f-44f31b2ef733/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:05:49,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:05:49,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:05:49,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:05:49,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:05:49,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:05:49,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:05:49,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:05:49,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:05:49,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:05:49,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:05:49,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:05:49,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:05:49,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:05:49,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:05:49,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:05:49,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:05:49,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:05:49,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:05:49,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:05:49,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:05:49,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:05:49,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:05:49,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:05:49,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:05:49,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:05:49,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:05:49,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:05:49,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:05:49,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:05:49,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:05:49,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:05:49,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:05:49,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:05:49,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:05:49,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:05:49,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:05:49,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:05:49,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:05:49,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:05:49,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:05:49,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:05:49,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:05:49,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:05:49,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:05:49,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:05:49,516 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:05:49,517 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:05:49,517 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:05:49,517 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:05:49,518 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:05:49,518 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:05:49,525 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:05:49,525 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:05:49,526 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:05:49,526 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:05:49,526 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:05:49,527 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:05:49,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:05:49,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:05:49,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:05:49,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:05:49,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:05:49,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:05:49,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:05:49,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:05:49,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:05:49,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:05:49,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:05:49,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:05:49,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:05:49,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:05:49,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:05:49,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:05:49,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:05:49,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:05:49,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:05:49,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:05:49,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:05:49,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:05:49,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:05:49,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:05:49,536 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_56b2769a-c068-4190-a20f-44f31b2ef733/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-12 23:05:49,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:05:49,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:05:49,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:05:49,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:05:49,876 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:05:49,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-12 23:05:49,951 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/46f7aee82/9f3582c54ff84e0e83645fa0775b0e27/FLAG137466c28 [2021-11-12 23:05:50,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:05:50,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-12 23:05:50,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/46f7aee82/9f3582c54ff84e0e83645fa0775b0e27/FLAG137466c28 [2021-11-12 23:05:50,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/46f7aee82/9f3582c54ff84e0e83645fa0775b0e27 [2021-11-12 23:05:50,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:05:50,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:05:50,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:05:50,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:05:50,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:05:50,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:05:50" (1/1) ... [2021-11-12 23:05:50,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228bcd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:50, skipping insertion in model container [2021-11-12 23:05:50,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:05:50" (1/1) ... [2021-11-12 23:05:50,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:05:50,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:05:51,112 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_56b2769a-c068-4190-a20f-44f31b2ef733/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-12 23:05:51,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:05:51,526 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:05:51,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c589432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:51, skipping insertion in model container [2021-11-12 23:05:51,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:05:51,528 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:05:51,529 INFO L158 Benchmark]: Toolchain (without parser) took 706.70ms. Allocated memory is still 90.2MB. Free memory was 46.6MB in the beginning and 50.5MB in the end (delta: -3.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:05:51,530 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 90.2MB. Free memory is still 65.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:05:51,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 692.86ms. Allocated memory is still 90.2MB. Free memory was 68.7MB in the beginning and 50.5MB in the end (delta: 18.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:05:51,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 90.2MB. Free memory is still 65.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 692.86ms. Allocated memory is still 90.2MB. Free memory was 68.7MB in the beginning and 50.5MB in the end (delta: 18.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 759]: 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_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/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_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/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_56b2769a-c068-4190-a20f-44f31b2ef733/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:05:53,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:05:53,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:05:53,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:05:53,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:05:53,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:05:53,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:05:53,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:05:53,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:05:53,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:05:53,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:05:53,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:05:53,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:05:53,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:05:53,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:05:53,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:05:53,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:05:53,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:05:53,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:05:53,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:05:53,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:05:53,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:05:53,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:05:53,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:05:53,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:05:53,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:05:53,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:05:53,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:05:53,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:05:53,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:05:53,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:05:53,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:05:53,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:05:53,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:05:53,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:05:53,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:05:53,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:05:53,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:05:53,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:05:53,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:05:53,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:05:54,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:05:54,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:05:54,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:05:54,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:05:54,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:05:54,051 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:05:54,051 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:05:54,052 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:05:54,052 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:05:54,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:05:54,053 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:05:54,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:05:54,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:05:54,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:05:54,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:05:54,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:05:54,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:05:54,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:05:54,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:05:54,058 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:05:54,058 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:05:54,058 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:05:54,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:05:54,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:05:54,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:05:54,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:05:54,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:05:54,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:05:54,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:05:54,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:05:54,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:05:54,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:05:54,061 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:05:54,062 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:05:54,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:05:54,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:05:54,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:05:54,063 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_56b2769a-c068-4190-a20f-44f31b2ef733/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2021-11-12 23:05:54,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:05:54,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:05:54,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:05:54,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:05:54,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:05:54,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-12 23:05:54,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/7823693e4/5af96694b86e4c27b2c258998c11d672/FLAG30d9b8706 [2021-11-12 23:05:55,298 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:05:55,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2021-11-12 23:05:55,330 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/7823693e4/5af96694b86e4c27b2c258998c11d672/FLAG30d9b8706 [2021-11-12 23:05:55,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/data/7823693e4/5af96694b86e4c27b2c258998c11d672 [2021-11-12 23:05:55,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:05:55,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:05:55,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:05:55,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:05:55,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:05:55,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:05:55" (1/1) ... [2021-11-12 23:05:55,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7521f016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:55, skipping insertion in model container [2021-11-12 23:05:55,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:05:55" (1/1) ... [2021-11-12 23:05:55,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:05:55,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:05:55,784 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_56b2769a-c068-4190-a20f-44f31b2ef733/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-12 23:05:56,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:05:56,327 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:05:56,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:05:56,356 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_56b2769a-c068-4190-a20f-44f31b2ef733/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-12 23:05:56,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:05:56,529 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:05:56,542 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_56b2769a-c068-4190-a20f-44f31b2ef733/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2021-11-12 23:05:56,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:05:56,717 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:05:56,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56 WrapperNode [2021-11-12 23:05:56,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:05:56,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:05:56,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:05:56,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:05:56,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:05:56,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:05:56,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:05:56,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:05:56,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:56,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:05:56,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:05:56,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:05:56,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:05:56,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (1/1) ... [2021-11-12 23:05:57,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:05:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:57,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:05:57,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:05:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:05:57,099 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:05:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:05:57,100 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:05:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:05:57,100 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:05:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:05:57,100 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:05:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:05:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:05:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:05:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:05:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:05:57,101 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:05:57,101 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:05:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:05:57,102 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:05:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:05:57,102 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:05:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:05:57,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:05:57,102 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:05:57,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:05:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:05:57,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:05:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:05:57,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:05:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:05:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:05:57,103 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:05:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:05:57,104 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:05:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:05:57,105 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:05:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:05:57,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:05:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:05:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:05:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2021-11-12 23:05:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2021-11-12 23:05:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:05:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:05:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:05:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:05:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:05:57,107 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:05:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:05:57,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:05:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:05:57,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:06:01,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:06:01,206 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:06:01,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:06:01 BoogieIcfgContainer [2021-11-12 23:06:01,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:06:01,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:06:01,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:06:01,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:06:01,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:05:55" (1/3) ... [2021-11-12 23:06:01,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba7556f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:06:01, skipping insertion in model container [2021-11-12 23:06:01,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:05:56" (2/3) ... [2021-11-12 23:06:01,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba7556f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:06:01, skipping insertion in model container [2021-11-12 23:06:01,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:06:01" (3/3) ... [2021-11-12 23:06:01,220 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2021-11-12 23:06:01,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:06:01,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:06:01,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:06:01,313 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 [2021-11-12 23:06:01,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:06:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 548 states, 429 states have (on average 1.7016317016317015) internal successors, (730), 452 states have internal predecessors, (730), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:06:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:06:01,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:01,397 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:01,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -583983565, now seen corresponding path program 1 times [2021-11-12 23:06:01,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:01,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709114078] [2021-11-12 23:06:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:01,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:01,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:01,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:06:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:06:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:06:02,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:06:02,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:02,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709114078] [2021-11-12 23:06:02,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709114078] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:02,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:02,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:06:02,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694749474] [2021-11-12 23:06:02,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:02,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:06:02,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:06:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:06:02,735 INFO L87 Difference]: Start difference. First operand has 548 states, 429 states have (on average 1.7016317016317015) internal successors, (730), 452 states have internal predecessors, (730), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-12 23:06:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:02,827 INFO L93 Difference]: Finished difference Result 569 states and 948 transitions. [2021-11-12 23:06:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:06:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2021-11-12 23:06:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:02,860 INFO L225 Difference]: With dead ends: 569 [2021-11-12 23:06:02,860 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:06:02,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:06:02,869 INFO L933 BasicCegarLoop]: 909 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, 909 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:02,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 11.04ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:06:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:06:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-12 23:06:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6997635933806146) internal successors, (719), 444 states have internal predecessors, (719), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 902 transitions. [2021-11-12 23:06:02,983 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 902 transitions. Word has length 79 [2021-11-12 23:06:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:02,986 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 902 transitions. [2021-11-12 23:06:02,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-12 23:06:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 902 transitions. [2021-11-12 23:06:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:06:02,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:02,993 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:03,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:03,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:03,207 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash 295773415, now seen corresponding path program 1 times [2021-11-12 23:06:03,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:03,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755554975] [2021-11-12 23:06:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:03,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:03,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:03,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:03,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:06:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:06:04,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:06:04,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:04,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755554975] [2021-11-12 23:06:04,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755554975] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:04,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:04,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:04,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226373955] [2021-11-12 23:06:04,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:04,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:04,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:04,555 INFO L87 Difference]: Start difference. First operand 540 states and 902 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:04,711 INFO L93 Difference]: Finished difference Result 1071 states and 1796 transitions. [2021-11-12 23:06:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2021-11-12 23:06:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:04,720 INFO L225 Difference]: With dead ends: 1071 [2021-11-12 23:06:04,720 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:06:04,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:04,730 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 14 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:04,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2657 Invalid, 35 Unknown, 0 Unchecked, 21.61ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 42.07ms Time] [2021-11-12 23:06:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:06:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-12 23:06:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6973995271867612) internal successors, (718), 444 states have internal predecessors, (718), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 901 transitions. [2021-11-12 23:06:04,816 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 901 transitions. Word has length 81 [2021-11-12 23:06:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:04,817 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 901 transitions. [2021-11-12 23:06:04,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 901 transitions. [2021-11-12 23:06:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:06:04,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:04,821 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:04,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:05,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:05,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1190651257, now seen corresponding path program 1 times [2021-11-12 23:06:05,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:05,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830348772] [2021-11-12 23:06:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:05,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:05,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:05,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:05,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:06:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:06:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:06:06,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:06,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830348772] [2021-11-12 23:06:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830348772] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:06,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:06,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:06,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545721269] [2021-11-12 23:06:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:06,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:06,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:06,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:06,186 INFO L87 Difference]: Start difference. First operand 540 states and 901 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:06,297 INFO L93 Difference]: Finished difference Result 1071 states and 1794 transitions. [2021-11-12 23:06:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-12 23:06:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:06,308 INFO L225 Difference]: With dead ends: 1071 [2021-11-12 23:06:06,308 INFO L226 Difference]: Without dead ends: 540 [2021-11-12 23:06:06,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:06,315 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 12 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.01ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:06,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2657 Invalid, 33 Unknown, 0 Unchecked, 16.01ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 42.17ms Time] [2021-11-12 23:06:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-12 23:06:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-12 23:06:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 423 states have (on average 1.6950354609929077) internal successors, (717), 444 states have internal predecessors, (717), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 900 transitions. [2021-11-12 23:06:06,367 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 900 transitions. Word has length 83 [2021-11-12 23:06:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:06,367 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 900 transitions. [2021-11-12 23:06:06,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 900 transitions. [2021-11-12 23:06:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:06:06,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:06,372 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:06,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:06,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:06,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash -756292569, now seen corresponding path program 1 times [2021-11-12 23:06:06,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:06,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862917886] [2021-11-12 23:06:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:06,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:06,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:06,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:06:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:06:07,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:06:07,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:07,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862917886] [2021-11-12 23:06:07,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862917886] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:07,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:07,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:07,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936997438] [2021-11-12 23:06:07,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:07,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:07,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:07,715 INFO L87 Difference]: Start difference. First operand 540 states and 900 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:07,806 INFO L93 Difference]: Finished difference Result 1075 states and 1797 transitions. [2021-11-12 23:06:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:06:07,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2021-11-12 23:06:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:07,813 INFO L225 Difference]: With dead ends: 1075 [2021-11-12 23:06:07,813 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:06:07,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:07,817 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 13 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:07,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2657 Invalid, 35 Unknown, 0 Unchecked, 6.84ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 42.14ms Time] [2021-11-12 23:06:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:06:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:06:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6869158878504673) internal successors, (722), 449 states have internal predecessors, (722), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 905 transitions. [2021-11-12 23:06:07,846 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 905 transitions. Word has length 85 [2021-11-12 23:06:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:07,846 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 905 transitions. [2021-11-12 23:06:07,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 905 transitions. [2021-11-12 23:06:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:06:07,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:07,856 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:07,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:08,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:08,077 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:08,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1855735790, now seen corresponding path program 1 times [2021-11-12 23:06:08,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:08,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012161788] [2021-11-12 23:06:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:08,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:08,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:08,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:08,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:06:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:06:08,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:06:09,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:09,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012161788] [2021-11-12 23:06:09,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012161788] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:09,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:09,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:09,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475380398] [2021-11-12 23:06:09,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:09,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:09,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:09,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:09,092 INFO L87 Difference]: Start difference. First operand 546 states and 905 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:09,175 INFO L93 Difference]: Finished difference Result 1074 states and 1788 transitions. [2021-11-12 23:06:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-12 23:06:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:09,192 INFO L225 Difference]: With dead ends: 1074 [2021-11-12 23:06:09,192 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:06:09,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:09,199 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 8 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:09,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2658 Invalid, 30 Unknown, 0 Unchecked, 6.17ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 35.03ms Time] [2021-11-12 23:06:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:06:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:06:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6845794392523366) internal successors, (721), 449 states have internal predecessors, (721), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 904 transitions. [2021-11-12 23:06:09,228 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 904 transitions. Word has length 86 [2021-11-12 23:06:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:09,229 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 904 transitions. [2021-11-12 23:06:09,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 904 transitions. [2021-11-12 23:06:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:06:09,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:09,231 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:09,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:09,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:09,431 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 781528715, now seen corresponding path program 1 times [2021-11-12 23:06:09,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:09,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664233822] [2021-11-12 23:06:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:09,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:09,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:09,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:09,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:06:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:09,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:06:10,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:06:10,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:10,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664233822] [2021-11-12 23:06:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664233822] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:10,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239616084] [2021-11-12 23:06:10,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:10,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:10,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:10,385 INFO L87 Difference]: Start difference. First operand 546 states and 904 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:10,472 INFO L93 Difference]: Finished difference Result 1074 states and 1787 transitions. [2021-11-12 23:06:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-12 23:06:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:10,479 INFO L225 Difference]: With dead ends: 1074 [2021-11-12 23:06:10,479 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:06:10,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:10,487 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 6 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:10,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2658 Invalid, 28 Unknown, 0 Unchecked, 4.75ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 42.17ms Time] [2021-11-12 23:06:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:06:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:06:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 428 states have (on average 1.6822429906542056) internal successors, (720), 449 states have internal predecessors, (720), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 903 transitions. [2021-11-12 23:06:10,517 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 903 transitions. Word has length 87 [2021-11-12 23:06:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:10,519 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 903 transitions. [2021-11-12 23:06:10,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 903 transitions. [2021-11-12 23:06:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:06:10,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:10,522 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:10,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:10,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:10,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1002351562, now seen corresponding path program 1 times [2021-11-12 23:06:10,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:10,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622479508] [2021-11-12 23:06:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:10,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:10,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:10,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:06:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:11,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:06:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:11,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:11,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:11,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622479508] [2021-11-12 23:06:11,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622479508] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:11,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:11,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:06:11,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92598055] [2021-11-12 23:06:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:11,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:06:11,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:06:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:11,980 INFO L87 Difference]: Start difference. First operand 546 states and 903 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:12,201 INFO L93 Difference]: Finished difference Result 1091 states and 1815 transitions. [2021-11-12 23:06:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:06:12,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-12 23:06:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:12,210 INFO L225 Difference]: With dead ends: 1091 [2021-11-12 23:06:12,211 INFO L226 Difference]: Without dead ends: 567 [2021-11-12 23:06:12,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:06:12,215 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 148 mSDsluCounter, 4328 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5215 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:12,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5215 Invalid, 85 Unknown, 0 Unchecked, 16.89ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 152.84ms Time] [2021-11-12 23:06:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-12 23:06:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2021-11-12 23:06:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 467 states have internal predecessors, (746), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-12 23:06:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 934 transitions. [2021-11-12 23:06:12,250 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 934 transitions. Word has length 88 [2021-11-12 23:06:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:12,250 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 934 transitions. [2021-11-12 23:06:12,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 934 transitions. [2021-11-12 23:06:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:06:12,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:12,258 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:12,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:12,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:12,471 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1486026889, now seen corresponding path program 1 times [2021-11-12 23:06:12,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:12,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916358104] [2021-11-12 23:06:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:12,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:12,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:12,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:06:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:12,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:12,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:06:13,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:06:13,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:13,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916358104] [2021-11-12 23:06:13,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916358104] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:13,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:13,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:06:13,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335759721] [2021-11-12 23:06:13,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:13,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:13,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:06:13,508 INFO L87 Difference]: Start difference. First operand 565 states and 934 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:13,609 INFO L93 Difference]: Finished difference Result 1104 states and 1837 transitions. [2021-11-12 23:06:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:06:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-11-12 23:06:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:13,615 INFO L225 Difference]: With dead ends: 1104 [2021-11-12 23:06:13,615 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 23:06:13,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:13,619 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 8 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.01ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:13,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2657 Invalid, 30 Unknown, 0 Unchecked, 11.01ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 47.19ms Time] [2021-11-12 23:06:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 23:06:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 23:06:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.6809954751131222) internal successors, (743), 464 states have internal predecessors, (743), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-12 23:06:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 927 transitions. [2021-11-12 23:06:13,650 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 927 transitions. Word has length 88 [2021-11-12 23:06:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:13,650 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 927 transitions. [2021-11-12 23:06:13,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 927 transitions. [2021-11-12 23:06:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:06:13,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:13,653 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:13,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:13,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:13,878 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -530748023, now seen corresponding path program 1 times [2021-11-12 23:06:13,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:13,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797383758] [2021-11-12 23:06:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:13,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:13,880 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:13,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:06:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:14,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:14,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:06:14,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:14,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797383758] [2021-11-12 23:06:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797383758] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:14,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:14,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:14,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46875898] [2021-11-12 23:06:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:14,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:14,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:14,830 INFO L87 Difference]: Start difference. First operand 561 states and 927 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:15,045 INFO L93 Difference]: Finished difference Result 1130 states and 1882 transitions. [2021-11-12 23:06:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2021-11-12 23:06:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:15,053 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:06:15,053 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 23:06:15,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:15,057 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 134 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.65ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:15,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2465 Invalid, 131 Unknown, 0 Unchecked, 6.65ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 168.21ms Time] [2021-11-12 23:06:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 23:06:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 23:06:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.669683257918552) internal successors, (738), 464 states have internal predecessors, (738), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-12 23:06:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 922 transitions. [2021-11-12 23:06:15,082 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 922 transitions. Word has length 89 [2021-11-12 23:06:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 922 transitions. [2021-11-12 23:06:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 922 transitions. [2021-11-12 23:06:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:06:15,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:15,085 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:15,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:15,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:15,299 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1976594173, now seen corresponding path program 1 times [2021-11-12 23:06:15,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:15,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134259373] [2021-11-12 23:06:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:15,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:15,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:15,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:06:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:16,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:06:16,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:16,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134259373] [2021-11-12 23:06:16,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134259373] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:16,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:16,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:16,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098476334] [2021-11-12 23:06:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:16,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:16,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:16,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:16,314 INFO L87 Difference]: Start difference. First operand 561 states and 922 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:16,508 INFO L93 Difference]: Finished difference Result 1130 states and 1872 transitions. [2021-11-12 23:06:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-12 23:06:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:16,515 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:06:16,515 INFO L226 Difference]: Without dead ends: 561 [2021-11-12 23:06:16,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:16,519 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 128 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:16,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2465 Invalid, 121 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 152.50ms Time] [2021-11-12 23:06:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-12 23:06:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-12 23:06:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.658371040723982) internal successors, (733), 464 states have internal predecessors, (733), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-12 23:06:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 917 transitions. [2021-11-12 23:06:16,567 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 917 transitions. Word has length 91 [2021-11-12 23:06:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:16,567 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 917 transitions. [2021-11-12 23:06:16,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 917 transitions. [2021-11-12 23:06:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:06:16,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:16,570 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:16,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:16,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:16,785 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash -684607959, now seen corresponding path program 1 times [2021-11-12 23:06:16,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:16,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905639408] [2021-11-12 23:06:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:16,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:16,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:16,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:16,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:06:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:17,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:06:17,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:17,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905639408] [2021-11-12 23:06:17,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905639408] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:17,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:17,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:17,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545491440] [2021-11-12 23:06:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:17,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:17,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:17,776 INFO L87 Difference]: Start difference. First operand 561 states and 917 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:18,022 INFO L93 Difference]: Finished difference Result 1151 states and 1893 transitions. [2021-11-12 23:06:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:06:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-11-12 23:06:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:18,030 INFO L225 Difference]: With dead ends: 1151 [2021-11-12 23:06:18,030 INFO L226 Difference]: Without dead ends: 591 [2021-11-12 23:06:18,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:18,037 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 143 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.35ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:18,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2475 Invalid, 131 Unknown, 0 Unchecked, 6.35ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 193.93ms Time] [2021-11-12 23:06:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-12 23:06:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 576. [2021-11-12 23:06:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 457 states have (on average 1.636761487964989) internal successors, (748), 478 states have internal predecessors, (748), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 931 transitions. [2021-11-12 23:06:18,065 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 931 transitions. Word has length 93 [2021-11-12 23:06:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:18,066 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 931 transitions. [2021-11-12 23:06:18,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 931 transitions. [2021-11-12 23:06:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:06:18,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:18,069 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:18,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:18,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:18,289 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1295693399, now seen corresponding path program 1 times [2021-11-12 23:06:18,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:18,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667434495] [2021-11-12 23:06:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:18,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:18,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:18,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:06:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:06:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:19,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:19,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:19,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667434495] [2021-11-12 23:06:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667434495] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:19,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:19,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:06:19,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421257545] [2021-11-12 23:06:19,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:19,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:06:19,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:06:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:06:19,397 INFO L87 Difference]: Start difference. First operand 576 states and 931 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:19,593 INFO L93 Difference]: Finished difference Result 1115 states and 1814 transitions. [2021-11-12 23:06:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:06:19,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-12 23:06:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:19,599 INFO L225 Difference]: With dead ends: 1115 [2021-11-12 23:06:19,600 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 23:06:19,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:06:19,604 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 131 mSDsluCounter, 4293 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5183 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.07ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:19,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5183 Invalid, 75 Unknown, 0 Unchecked, 9.07ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 145.28ms Time] [2021-11-12 23:06:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 23:06:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 555. [2021-11-12 23:06:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6307339449541285) internal successors, (711), 457 states have internal predecessors, (711), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 894 transitions. [2021-11-12 23:06:19,632 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 894 transitions. Word has length 93 [2021-11-12 23:06:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:19,633 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 894 transitions. [2021-11-12 23:06:19,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 894 transitions. [2021-11-12 23:06:19,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-12 23:06:19,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:19,636 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:19,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:19,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:19,851 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash 23962835, now seen corresponding path program 1 times [2021-11-12 23:06:19,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:19,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497536300] [2021-11-12 23:06:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:19,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:19,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:19,853 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:19,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:06:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:20,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:06:20,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:20,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497536300] [2021-11-12 23:06:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497536300] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:20,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:20,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:20,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434818810] [2021-11-12 23:06:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:20,805 INFO L87 Difference]: Start difference. First operand 555 states and 894 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:20,952 INFO L93 Difference]: Finished difference Result 1079 states and 1752 transitions. [2021-11-12 23:06:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:20,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-11-12 23:06:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:20,959 INFO L225 Difference]: With dead ends: 1079 [2021-11-12 23:06:20,959 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 23:06:20,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:20,963 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 69 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:20,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2489 Invalid, 54 Unknown, 0 Unchecked, 4.08ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 101.61ms Time] [2021-11-12 23:06:20,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 23:06:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-12 23:06:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.628440366972477) internal successors, (710), 457 states have internal predecessors, (710), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 893 transitions. [2021-11-12 23:06:20,988 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 893 transitions. Word has length 94 [2021-11-12 23:06:20,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:20,988 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 893 transitions. [2021-11-12 23:06:20,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 893 transitions. [2021-11-12 23:06:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:06:20,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:20,992 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:21,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:21,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:21,216 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash 832386052, now seen corresponding path program 1 times [2021-11-12 23:06:21,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:21,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127990422] [2021-11-12 23:06:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:21,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:21,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:21,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:06:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:06:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:21,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:06:22,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:22,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127990422] [2021-11-12 23:06:22,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127990422] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:22,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:22,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:06:22,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250696450] [2021-11-12 23:06:22,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:22,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:06:22,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:06:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:06:22,175 INFO L87 Difference]: Start difference. First operand 555 states and 893 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:22,275 INFO L93 Difference]: Finished difference Result 1079 states and 1751 transitions. [2021-11-12 23:06:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:06:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2021-11-12 23:06:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:22,281 INFO L225 Difference]: With dead ends: 1079 [2021-11-12 23:06:22,282 INFO L226 Difference]: Without dead ends: 555 [2021-11-12 23:06:22,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:06:22,286 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 67 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:22,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2489 Invalid, 52 Unknown, 0 Unchecked, 4.34ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 69.61ms Time] [2021-11-12 23:06:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-12 23:06:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-12 23:06:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 436 states have (on average 1.6261467889908257) internal successors, (709), 457 states have internal predecessors, (709), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 892 transitions. [2021-11-12 23:06:22,323 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 892 transitions. Word has length 95 [2021-11-12 23:06:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:22,324 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 892 transitions. [2021-11-12 23:06:22,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 23:06:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 892 transitions. [2021-11-12 23:06:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:06:22,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:22,327 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:22,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:22,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:22,547 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash 441267086, now seen corresponding path program 1 times [2021-11-12 23:06:22,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:22,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068943303] [2021-11-12 23:06:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:22,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:22,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:22,549 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:22,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:06:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:06:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:23,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:23,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:23,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068943303] [2021-11-12 23:06:23,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068943303] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:23,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:23,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:06:23,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208138911] [2021-11-12 23:06:23,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:23,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:23,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:23,831 INFO L87 Difference]: Start difference. First operand 555 states and 892 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:24,113 INFO L93 Difference]: Finished difference Result 1084 states and 1758 transitions. [2021-11-12 23:06:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2021-11-12 23:06:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:24,119 INFO L225 Difference]: With dead ends: 1084 [2021-11-12 23:06:24,119 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:06:24,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:24,122 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 109 mSDsluCounter, 4940 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5774 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.77ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:24,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5774 Invalid, 152 Unknown, 0 Unchecked, 37.77ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 178.22ms Time] [2021-11-12 23:06:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:06:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 557. [2021-11-12 23:06:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 438 states have (on average 1.6210045662100456) internal successors, (710), 459 states have internal predecessors, (710), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 893 transitions. [2021-11-12 23:06:24,151 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 893 transitions. Word has length 96 [2021-11-12 23:06:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:24,152 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 893 transitions. [2021-11-12 23:06:24,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 893 transitions. [2021-11-12 23:06:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:06:24,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:24,154 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:24,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:24,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:24,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1075232527, now seen corresponding path program 1 times [2021-11-12 23:06:24,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:24,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501684482] [2021-11-12 23:06:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:24,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:24,380 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:24,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:06:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:06:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:25,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:25,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:25,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501684482] [2021-11-12 23:06:25,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501684482] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:06:25,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:06:25,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:06:25,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889778734] [2021-11-12 23:06:25,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:25,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:25,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:25,497 INFO L87 Difference]: Start difference. First operand 557 states and 893 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:25,804 INFO L93 Difference]: Finished difference Result 1076 states and 1739 transitions. [2021-11-12 23:06:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:25,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2021-11-12 23:06:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:25,810 INFO L225 Difference]: With dead ends: 1076 [2021-11-12 23:06:25,810 INFO L226 Difference]: Without dead ends: 562 [2021-11-12 23:06:25,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:25,815 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 77 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5782 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:25,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5782 Invalid, 152 Unknown, 0 Unchecked, 9.16ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 197.35ms Time] [2021-11-12 23:06:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-12 23:06:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2021-11-12 23:06:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 440 states have (on average 1.615909090909091) internal successors, (711), 461 states have internal predecessors, (711), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 894 transitions. [2021-11-12 23:06:25,842 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 894 transitions. Word has length 97 [2021-11-12 23:06:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:25,843 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 894 transitions. [2021-11-12 23:06:25,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:06:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 894 transitions. [2021-11-12 23:06:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:06:25,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:25,846 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-12 23:06:25,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:26,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:26,067 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1097218952, now seen corresponding path program 1 times [2021-11-12 23:06:26,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:26,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975607367] [2021-11-12 23:06:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:26,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:26,069 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:26,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:06:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:06:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:26,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:27,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975607367] [2021-11-12 23:06:27,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975607367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:27,039 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:27,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:06:27,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913441941] [2021-11-12 23:06:27,039 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:27,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:06:27,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:06:27,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:27,041 INFO L87 Difference]: Start difference. First operand 559 states and 894 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:27,251 INFO L93 Difference]: Finished difference Result 1022 states and 1666 transitions. [2021-11-12 23:06:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:06:27,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 98 [2021-11-12 23:06:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:27,257 INFO L225 Difference]: With dead ends: 1022 [2021-11-12 23:06:27,258 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 23:06:27,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:06:27,262 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 56 mSDsluCounter, 5865 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6713 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:27,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 6713 Invalid, 113 Unknown, 0 Unchecked, 9.67ms Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 159.06ms Time] [2021-11-12 23:06:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 23:06:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-12 23:06:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 433 states have (on average 1.6235565819861433) internal successors, (703), 454 states have internal predecessors, (703), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 886 transitions. [2021-11-12 23:06:27,284 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 886 transitions. Word has length 98 [2021-11-12 23:06:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:27,284 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 886 transitions. [2021-11-12 23:06:27,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 886 transitions. [2021-11-12 23:06:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:06:27,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:27,287 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:27,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:27,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:27,508 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1002933603, now seen corresponding path program 1 times [2021-11-12 23:06:27,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:27,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568762439] [2021-11-12 23:06:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:27,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:27,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:27,510 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:27,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:06:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:06:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:28,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:28,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:28,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568762439] [2021-11-12 23:06:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568762439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:28,473 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:28,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:06:28,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669925954] [2021-11-12 23:06:28,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:28,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:06:28,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:06:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:28,479 INFO L87 Difference]: Start difference. First operand 552 states and 886 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:28,653 INFO L93 Difference]: Finished difference Result 1027 states and 1680 transitions. [2021-11-12 23:06:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:06:28,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 99 [2021-11-12 23:06:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:28,660 INFO L225 Difference]: With dead ends: 1027 [2021-11-12 23:06:28,660 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 23:06:28,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:06:28,664 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 98 mSDsluCounter, 6615 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 7455 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:28,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 7455 Invalid, 105 Unknown, 0 Unchecked, 7.11ms Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 134.11ms Time] [2021-11-12 23:06:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 23:06:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 23:06:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 430 states have (on average 1.6232558139534883) internal successors, (698), 451 states have internal predecessors, (698), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 881 transitions. [2021-11-12 23:06:28,687 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 881 transitions. Word has length 99 [2021-11-12 23:06:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:28,688 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 881 transitions. [2021-11-12 23:06:28,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 881 transitions. [2021-11-12 23:06:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:06:28,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:28,690 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:28,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:28,903 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1153365533, now seen corresponding path program 1 times [2021-11-12 23:06:28,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:28,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848112968] [2021-11-12 23:06:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:28,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:28,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:28,905 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:28,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:06:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:06:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:29,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:29,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:29,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848112968] [2021-11-12 23:06:29,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848112968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:29,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:29,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:06:29,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652966653] [2021-11-12 23:06:29,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:29,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:29,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:06:29,876 INFO L87 Difference]: Start difference. First operand 549 states and 881 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:06:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:29,992 INFO L93 Difference]: Finished difference Result 1024 states and 1675 transitions. [2021-11-12 23:06:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:06:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 99 [2021-11-12 23:06:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:29,998 INFO L225 Difference]: With dead ends: 1024 [2021-11-12 23:06:29,999 INFO L226 Difference]: Without dead ends: 541 [2021-11-12 23:06:30,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:06:30,002 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 142 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 4971 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:30,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 4971 Invalid, 68 Unknown, 0 Unchecked, 5.36ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 81.55ms Time] [2021-11-12 23:06:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-12 23:06:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-12 23:06:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 422 states have (on average 1.627962085308057) internal successors, (687), 443 states have internal predecessors, (687), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 870 transitions. [2021-11-12 23:06:30,023 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 870 transitions. Word has length 99 [2021-11-12 23:06:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:30,024 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 870 transitions. [2021-11-12 23:06:30,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-12 23:06:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 870 transitions. [2021-11-12 23:06:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:06:30,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:30,027 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-12 23:06:30,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:30,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:30,251 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 718859772, now seen corresponding path program 1 times [2021-11-12 23:06:30,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:30,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847620919] [2021-11-12 23:06:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:30,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:30,254 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:30,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:06:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:06:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:30,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:31,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:31,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847620919] [2021-11-12 23:06:31,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847620919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:31,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:31,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:06:31,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836545583] [2021-11-12 23:06:31,414 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:31,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:06:31,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:06:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:31,415 INFO L87 Difference]: Start difference. First operand 541 states and 870 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:31,621 INFO L93 Difference]: Finished difference Result 1010 states and 1653 transitions. [2021-11-12 23:06:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 100 [2021-11-12 23:06:31,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:31,627 INFO L225 Difference]: With dead ends: 1010 [2021-11-12 23:06:31,627 INFO L226 Difference]: Without dead ends: 541 [2021-11-12 23:06:31,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:06:31,631 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 92 mSDsluCounter, 6553 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7388 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:31,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 7388 Invalid, 132 Unknown, 0 Unchecked, 8.24ms Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 145.17ms Time] [2021-11-12 23:06:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-12 23:06:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-12 23:06:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 422 states have (on average 1.6255924170616114) internal successors, (686), 443 states have internal predecessors, (686), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 869 transitions. [2021-11-12 23:06:31,652 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 869 transitions. Word has length 100 [2021-11-12 23:06:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:31,652 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 869 transitions. [2021-11-12 23:06:31,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 869 transitions. [2021-11-12 23:06:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:06:31,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:31,655 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:31,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:31,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:31,875 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 554425345, now seen corresponding path program 1 times [2021-11-12 23:06:31,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:31,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752233489] [2021-11-12 23:06:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:31,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:31,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:31,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:31,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:06:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:06:32,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:32,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:32,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:32,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752233489] [2021-11-12 23:06:32,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752233489] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:32,972 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:32,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:06:32,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359812301] [2021-11-12 23:06:32,973 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:32,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:06:32,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:06:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:32,974 INFO L87 Difference]: Start difference. First operand 541 states and 869 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:33,164 INFO L93 Difference]: Finished difference Result 1054 states and 1710 transitions. [2021-11-12 23:06:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 101 [2021-11-12 23:06:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:33,170 INFO L225 Difference]: With dead ends: 1054 [2021-11-12 23:06:33,170 INFO L226 Difference]: Without dead ends: 538 [2021-11-12 23:06:33,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:33,174 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 190 mSDsluCounter, 4902 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 5725 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:33,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 5725 Invalid, 111 Unknown, 0 Unchecked, 6.54ms Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 108.22ms Time] [2021-11-12 23:06:33,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-12 23:06:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-12 23:06:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.6181384248210025) internal successors, (678), 440 states have internal predecessors, (678), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 861 transitions. [2021-11-12 23:06:33,195 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 861 transitions. Word has length 101 [2021-11-12 23:06:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:33,195 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 861 transitions. [2021-11-12 23:06:33,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 861 transitions. [2021-11-12 23:06:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:06:33,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:33,198 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-12 23:06:33,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:33,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:33,415 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash -566525215, now seen corresponding path program 1 times [2021-11-12 23:06:33,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:33,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506529560] [2021-11-12 23:06:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:33,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:33,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:33,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:33,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:06:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:33,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:06:33,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:34,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:34,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506529560] [2021-11-12 23:06:34,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506529560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:34,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:34,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:06:34,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737372398] [2021-11-12 23:06:34,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:34,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:06:34,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:06:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:34,537 INFO L87 Difference]: Start difference. First operand 538 states and 861 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:34,787 INFO L93 Difference]: Finished difference Result 1001 states and 1633 transitions. [2021-11-12 23:06:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 102 [2021-11-12 23:06:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:34,793 INFO L225 Difference]: With dead ends: 1001 [2021-11-12 23:06:34,793 INFO L226 Difference]: Without dead ends: 538 [2021-11-12 23:06:34,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:06:34,797 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 51 mSDsluCounter, 8138 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8962 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:34,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8962 Invalid, 160 Unknown, 0 Unchecked, 8.25ms Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 167.12ms Time] [2021-11-12 23:06:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-12 23:06:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-11-12 23:06:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 419 states have (on average 1.6157517899761336) internal successors, (677), 440 states have internal predecessors, (677), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 860 transitions. [2021-11-12 23:06:34,818 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 860 transitions. Word has length 102 [2021-11-12 23:06:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:34,819 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 860 transitions. [2021-11-12 23:06:34,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:34,819 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 860 transitions. [2021-11-12 23:06:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:06:34,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:34,821 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:06:34,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:35,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:35,041 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash 683115442, now seen corresponding path program 1 times [2021-11-12 23:06:35,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:35,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162530100] [2021-11-12 23:06:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:35,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:35,042 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:35,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:06:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:06:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:35,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:06:36,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:36,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162530100] [2021-11-12 23:06:36,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162530100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:36,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:36,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:06:36,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561914942] [2021-11-12 23:06:36,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:36,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:06:36,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:06:36,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:36,181 INFO L87 Difference]: Start difference. First operand 538 states and 860 transitions. Second operand has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:36,385 INFO L93 Difference]: Finished difference Result 1039 states and 1678 transitions. [2021-11-12 23:06:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:36,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 103 [2021-11-12 23:06:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:36,394 INFO L225 Difference]: With dead ends: 1039 [2021-11-12 23:06:36,394 INFO L226 Difference]: Without dead ends: 535 [2021-11-12 23:06:36,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:06:36,398 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 88 mSDsluCounter, 6494 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 7316 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:36,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 7316 Invalid, 126 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 142.41ms Time] [2021-11-12 23:06:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-12 23:06:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-12 23:06:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 416 states have (on average 1.6081730769230769) internal successors, (669), 437 states have internal predecessors, (669), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-12 23:06:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 852 transitions. [2021-11-12 23:06:36,447 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 852 transitions. Word has length 103 [2021-11-12 23:06:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:36,447 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 852 transitions. [2021-11-12 23:06:36,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 23:06:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 852 transitions. [2021-11-12 23:06:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:06:36,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:36,450 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-12 23:06:36,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:36,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:36,670 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:36,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1878868346, now seen corresponding path program 1 times [2021-11-12 23:06:36,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:36,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983518534] [2021-11-12 23:06:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:36,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:36,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:36,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:06:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:06:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:06:37,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:06:38,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:38,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983518534] [2021-11-12 23:06:38,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983518534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:38,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:38,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-12 23:06:38,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662323066] [2021-11-12 23:06:38,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:06:38,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:06:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:06:38,276 INFO L87 Difference]: Start difference. First operand 535 states and 852 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-12 23:06:40,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:42,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:44,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:49,721 INFO L93 Difference]: Finished difference Result 2037 states and 3393 transitions. [2021-11-12 23:06:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:06:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2021-11-12 23:06:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:49,735 INFO L225 Difference]: With dead ends: 2037 [2021-11-12 23:06:49,735 INFO L226 Difference]: Without dead ends: 1582 [2021-11-12 23:06:49,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:06:49,739 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 3670 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 857 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10435.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3778 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.68ms SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11196.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:49,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3778 Valid, 2032 Invalid, 3863 Unknown, 0 Unchecked, 37.68ms Time], IncrementalHoareTripleChecker [857 Valid, 3003 Invalid, 3 Unknown, 0 Unchecked, 11196.30ms Time] [2021-11-12 23:06:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-12 23:06:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1390. [2021-11-12 23:06:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1099 states have (on average 1.670609645131938) internal successors, (1836), 1138 states have internal predecessors, (1836), 237 states have call successors, (237), 52 states have call predecessors, (237), 53 states have return successors, (242), 213 states have call predecessors, (242), 232 states have call successors, (242) [2021-11-12 23:06:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2315 transitions. [2021-11-12 23:06:49,809 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2315 transitions. Word has length 104 [2021-11-12 23:06:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:49,810 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 2315 transitions. [2021-11-12 23:06:49,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-12 23:06:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2315 transitions. [2021-11-12 23:06:49,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:06:49,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:49,815 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:49,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:50,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:50,051 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1373298605, now seen corresponding path program 1 times [2021-11-12 23:06:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:50,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580285234] [2021-11-12 23:06:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:50,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:50,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:50,055 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:50,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:06:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:06:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:06:50,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:06:51,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:51,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580285234] [2021-11-12 23:06:51,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580285234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:51,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:06:51,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845416524] [2021-11-12 23:06:51,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:51,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:06:51,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:51,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:06:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:06:51,494 INFO L87 Difference]: Start difference. First operand 1390 states and 2315 transitions. Second operand has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:06:53,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:55,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:57,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:05,850 INFO L93 Difference]: Finished difference Result 4401 states and 7417 transitions. [2021-11-12 23:07:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:07:05,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 132 [2021-11-12 23:07:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:05,880 INFO L225 Difference]: With dead ends: 4401 [2021-11-12 23:07:05,880 INFO L226 Difference]: Without dead ends: 3091 [2021-11-12 23:07:05,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:07:05,890 INFO L933 BasicCegarLoop]: 1717 mSDtfsCounter, 2863 mSDsluCounter, 3801 mSDsCounter, 0 mSdLazyCounter, 7667 mSolverCounterSat, 958 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12795.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2949 SdHoareTripleChecker+Valid, 5518 SdHoareTripleChecker+Invalid, 8628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.09ms SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 7667 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13834.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:05,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2949 Valid, 5518 Invalid, 8628 Unknown, 0 Unchecked, 50.09ms Time], IncrementalHoareTripleChecker [958 Valid, 7667 Invalid, 3 Unknown, 0 Unchecked, 13834.40ms Time] [2021-11-12 23:07:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-11-12 23:07:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2733. [2021-11-12 23:07:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2072 states have (on average 1.640926640926641) internal successors, (3400), 2164 states have internal predecessors, (3400), 556 states have call successors, (556), 87 states have call predecessors, (556), 104 states have return successors, (592), 514 states have call predecessors, (592), 551 states have call successors, (592) [2021-11-12 23:07:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 4548 transitions. [2021-11-12 23:07:06,077 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 4548 transitions. Word has length 132 [2021-11-12 23:07:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:06,077 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 4548 transitions. [2021-11-12 23:07:06,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:07:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 4548 transitions. [2021-11-12 23:07:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:07:06,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:06,082 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:06,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:06,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:06,303 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -404411890, now seen corresponding path program 1 times [2021-11-12 23:07:06,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:06,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599731238] [2021-11-12 23:07:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:06,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:06,306 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:06,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:07:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:06,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:07:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:07,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:08,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599731238] [2021-11-12 23:07:08,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599731238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:08,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:08,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:07:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868484790] [2021-11-12 23:07:08,550 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:08,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:07:08,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:08,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:07:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:07:08,552 INFO L87 Difference]: Start difference. First operand 2733 states and 4548 transitions. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:07:10,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:12,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:14,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:16,630 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:20,726 INFO L93 Difference]: Finished difference Result 6169 states and 10484 transitions. [2021-11-12 23:07:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:07:20,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) Word has length 133 [2021-11-12 23:07:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:20,752 INFO L225 Difference]: With dead ends: 6169 [2021-11-12 23:07:20,753 INFO L226 Difference]: Without dead ends: 3516 [2021-11-12 23:07:20,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:07:20,767 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 1372 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 3719 mSolverCounterSat, 537 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11376.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 3093 SdHoareTripleChecker+Invalid, 4260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.63ms SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3719 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11900.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:20,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 3093 Invalid, 4260 Unknown, 0 Unchecked, 20.63ms Time], IncrementalHoareTripleChecker [537 Valid, 3719 Invalid, 4 Unknown, 0 Unchecked, 11900.64ms Time] [2021-11-12 23:07:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-11-12 23:07:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 2757. [2021-11-12 23:07:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2090 states have (on average 1.6354066985645932) internal successors, (3418), 2182 states have internal predecessors, (3418), 556 states have call successors, (556), 87 states have call predecessors, (556), 110 states have return successors, (658), 520 states have call predecessors, (658), 551 states have call successors, (658) [2021-11-12 23:07:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4632 transitions. [2021-11-12 23:07:21,026 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4632 transitions. Word has length 133 [2021-11-12 23:07:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:21,027 INFO L470 AbstractCegarLoop]: Abstraction has 2757 states and 4632 transitions. [2021-11-12 23:07:21,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:07:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4632 transitions. [2021-11-12 23:07:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:07:21,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:21,033 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:21,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:21,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:21,247 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2044939391, now seen corresponding path program 1 times [2021-11-12 23:07:21,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:21,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594073213] [2021-11-12 23:07:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:21,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:21,249 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:21,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:07:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:21,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:07:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:22,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:22,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:22,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594073213] [2021-11-12 23:07:22,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594073213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:22,815 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:22,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:07:22,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185580756] [2021-11-12 23:07:22,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:22,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:07:22,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:07:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:07:22,817 INFO L87 Difference]: Start difference. First operand 2757 states and 4632 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-12 23:07:24,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:26,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:33,466 INFO L93 Difference]: Finished difference Result 8944 states and 15420 transitions. [2021-11-12 23:07:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:07:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 134 [2021-11-12 23:07:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:33,513 INFO L225 Difference]: With dead ends: 8944 [2021-11-12 23:07:33,513 INFO L226 Difference]: Without dead ends: 6267 [2021-11-12 23:07:33,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:07:33,526 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 4643 mSDsluCounter, 2610 mSDsCounter, 0 mSdLazyCounter, 5030 mSolverCounterSat, 1297 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9312.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4718 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 6329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.73ms SdHoareTripleChecker+Time, 1297 IncrementalHoareTripleChecker+Valid, 5030 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10120.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:33,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4718 Valid, 3984 Invalid, 6329 Unknown, 0 Unchecked, 36.73ms Time], IncrementalHoareTripleChecker [1297 Valid, 5030 Invalid, 2 Unknown, 0 Unchecked, 10120.74ms Time] [2021-11-12 23:07:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-11-12 23:07:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5961. [2021-11-12 23:07:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5961 states, 4518 states have (on average 1.6328021248339974) internal successors, (7377), 4738 states have internal predecessors, (7377), 1189 states have call successors, (1189), 215 states have call predecessors, (1189), 253 states have return successors, (1363), 1084 states have call predecessors, (1363), 1184 states have call successors, (1363) [2021-11-12 23:07:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 9929 transitions. [2021-11-12 23:07:33,981 INFO L78 Accepts]: Start accepts. Automaton has 5961 states and 9929 transitions. Word has length 134 [2021-11-12 23:07:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:33,982 INFO L470 AbstractCegarLoop]: Abstraction has 5961 states and 9929 transitions. [2021-11-12 23:07:33,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-12 23:07:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5961 states and 9929 transitions. [2021-11-12 23:07:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:07:33,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:33,987 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:34,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:34,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:34,208 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1455544825, now seen corresponding path program 1 times [2021-11-12 23:07:34,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:34,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848604019] [2021-11-12 23:07:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:34,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:34,211 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:34,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:07:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:07:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:35,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:35,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:35,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848604019] [2021-11-12 23:07:35,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848604019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:35,784 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:35,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-12 23:07:35,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112655275] [2021-11-12 23:07:35,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:35,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:07:35,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:07:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:07:35,786 INFO L87 Difference]: Start difference. First operand 5961 states and 9929 transitions. Second operand has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-12 23:07:37,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:39,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:41,832 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:43,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:07:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:53,825 INFO L93 Difference]: Finished difference Result 22715 states and 39068 transitions. [2021-11-12 23:07:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:07:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 136 [2021-11-12 23:07:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:53,950 INFO L225 Difference]: With dead ends: 22715 [2021-11-12 23:07:53,950 INFO L226 Difference]: Without dead ends: 16816 [2021-11-12 23:07:53,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:07:53,987 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 4525 mSDsluCounter, 2812 mSDsCounter, 0 mSdLazyCounter, 7441 mSolverCounterSat, 1957 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15576.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4624 SdHoareTripleChecker+Valid, 4393 SdHoareTripleChecker+Invalid, 9402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.38ms SdHoareTripleChecker+Time, 1957 IncrementalHoareTripleChecker+Valid, 7441 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16776.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:53,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4624 Valid, 4393 Invalid, 9402 Unknown, 0 Unchecked, 42.38ms Time], IncrementalHoareTripleChecker [1957 Valid, 7441 Invalid, 4 Unknown, 0 Unchecked, 16776.40ms Time] [2021-11-12 23:07:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16816 states. [2021-11-12 23:07:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16816 to 10492. [2021-11-12 23:07:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10492 states, 7829 states have (on average 1.6228126197470942) internal successors, (12705), 8252 states have internal predecessors, (12705), 2229 states have call successors, (2229), 333 states have call predecessors, (2229), 433 states have return successors, (2584), 2095 states have call predecessors, (2584), 2224 states have call successors, (2584) [2021-11-12 23:07:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 17518 transitions. [2021-11-12 23:07:55,158 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 17518 transitions. Word has length 136 [2021-11-12 23:07:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:55,163 INFO L470 AbstractCegarLoop]: Abstraction has 10492 states and 17518 transitions. [2021-11-12 23:07:55,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-12 23:07:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 17518 transitions. [2021-11-12 23:07:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:07:55,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:55,168 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:55,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:55,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:55,375 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1879191547, now seen corresponding path program 1 times [2021-11-12 23:07:55,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:55,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075983409] [2021-11-12 23:07:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:55,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:55,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:55,377 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:55,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:07:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:07:55,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:56,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:07:56,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:56,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075983409] [2021-11-12 23:07:56,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075983409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:56,809 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:56,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:07:56,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549520988] [2021-11-12 23:07:56,810 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:56,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:07:56,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:07:56,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:07:56,811 INFO L87 Difference]: Start difference. First operand 10492 states and 17518 transitions. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:07:58,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:00,839 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:06,223 INFO L93 Difference]: Finished difference Result 30720 states and 52180 transitions. [2021-11-12 23:08:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:08:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 136 [2021-11-12 23:08:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,333 INFO L225 Difference]: With dead ends: 30720 [2021-11-12 23:08:06,333 INFO L226 Difference]: Without dead ends: 21879 [2021-11-12 23:08:06,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:08:06,374 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 3444 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 844 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7467.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.99ms SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8070.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3518 Valid, 2408 Invalid, 3890 Unknown, 0 Unchecked, 24.99ms Time], IncrementalHoareTripleChecker [844 Valid, 3044 Invalid, 2 Unknown, 0 Unchecked, 8070.18ms Time] [2021-11-12 23:08:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21879 states. [2021-11-12 23:08:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21879 to 20881. [2021-11-12 23:08:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20881 states, 15548 states have (on average 1.6214304090558271) internal successors, (25210), 16459 states have internal predecessors, (25210), 4372 states have call successors, (4372), 635 states have call predecessors, (4372), 960 states have return successors, (5567), 4137 states have call predecessors, (5567), 4367 states have call successors, (5567) [2021-11-12 23:08:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20881 states to 20881 states and 35149 transitions. [2021-11-12 23:08:08,058 INFO L78 Accepts]: Start accepts. Automaton has 20881 states and 35149 transitions. Word has length 136 [2021-11-12 23:08:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 20881 states and 35149 transitions. [2021-11-12 23:08:08,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-12 23:08:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 20881 states and 35149 transitions. [2021-11-12 23:08:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:08:08,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:08,063 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:08,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:08,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:08,284 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:08,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1001590863, now seen corresponding path program 1 times [2021-11-12 23:08:08,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:08,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280561162] [2021-11-12 23:08:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:08,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:08,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:08,288 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:08,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:08:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:08:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:08:09,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:08:10,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:10,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280561162] [2021-11-12 23:08:10,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280561162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:10,419 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:10,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:08:10,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960869087] [2021-11-12 23:08:10,420 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:10,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:08:10,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:08:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:08:10,421 INFO L87 Difference]: Start difference. First operand 20881 states and 35149 transitions. Second operand has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 23:08:12,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:14,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:16,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:26,045 INFO L93 Difference]: Finished difference Result 58770 states and 99820 transitions. [2021-11-12 23:08:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:08:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) Word has length 141 [2021-11-12 23:08:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:26,213 INFO L225 Difference]: With dead ends: 58770 [2021-11-12 23:08:26,213 INFO L226 Difference]: Without dead ends: 39078 [2021-11-12 23:08:26,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:08:26,274 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 3326 mSDsluCounter, 2323 mSDsCounter, 0 mSdLazyCounter, 6189 mSolverCounterSat, 891 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11786.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3400 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 7083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.73ms SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 6189 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12673.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:26,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3400 Valid, 3281 Invalid, 7083 Unknown, 0 Unchecked, 31.73ms Time], IncrementalHoareTripleChecker [891 Valid, 6189 Invalid, 3 Unknown, 0 Unchecked, 12673.99ms Time] [2021-11-12 23:08:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39078 states. [2021-11-12 23:08:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39078 to 38556. [2021-11-12 23:08:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38556 states, 28470 states have (on average 1.6032665964172814) internal successors, (45645), 30154 states have internal predecessors, (45645), 8244 states have call successors, (8244), 1217 states have call predecessors, (8244), 1841 states have return successors, (10814), 7859 states have call predecessors, (10814), 8239 states have call successors, (10814) [2021-11-12 23:08:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38556 states to 38556 states and 64703 transitions. [2021-11-12 23:08:29,375 INFO L78 Accepts]: Start accepts. Automaton has 38556 states and 64703 transitions. Word has length 141 [2021-11-12 23:08:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:29,376 INFO L470 AbstractCegarLoop]: Abstraction has 38556 states and 64703 transitions. [2021-11-12 23:08:29,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 23:08:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38556 states and 64703 transitions. [2021-11-12 23:08:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:08:29,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:29,381 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:29,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:29,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:29,595 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:29,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1290515199, now seen corresponding path program 1 times [2021-11-12 23:08:29,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:29,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756411656] [2021-11-12 23:08:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:29,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:29,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:29,598 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:08:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:30,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:08:30,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:08:30,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:30,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756411656] [2021-11-12 23:08:30,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756411656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:30,942 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:30,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:08:30,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136288626] [2021-11-12 23:08:30,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:30,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:30,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:30,944 INFO L87 Difference]: Start difference. First operand 38556 states and 64703 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:08:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:33,813 INFO L93 Difference]: Finished difference Result 78185 states and 132933 transitions. [2021-11-12 23:08:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:08:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 148 [2021-11-12 23:08:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:34,014 INFO L225 Difference]: With dead ends: 78185 [2021-11-12 23:08:34,015 INFO L226 Difference]: Without dead ends: 38556 [2021-11-12 23:08:34,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:34,254 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 310 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:34,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 3044 Invalid, 88 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 74.10ms Time] [2021-11-12 23:08:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38556 states. [2021-11-12 23:08:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38556 to 38556. [2021-11-12 23:08:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38556 states, 28470 states have (on average 1.5845100105374077) internal successors, (45111), 30154 states have internal predecessors, (45111), 8244 states have call successors, (8244), 1217 states have call predecessors, (8244), 1841 states have return successors, (10814), 7859 states have call predecessors, (10814), 8239 states have call successors, (10814) [2021-11-12 23:08:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38556 states to 38556 states and 64169 transitions. [2021-11-12 23:08:37,036 INFO L78 Accepts]: Start accepts. Automaton has 38556 states and 64169 transitions. Word has length 148 [2021-11-12 23:08:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:37,037 INFO L470 AbstractCegarLoop]: Abstraction has 38556 states and 64169 transitions. [2021-11-12 23:08:37,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 23:08:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 38556 states and 64169 transitions. [2021-11-12 23:08:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-12 23:08:37,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:37,043 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:37,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:37,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:37,263 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 266568332, now seen corresponding path program 1 times [2021-11-12 23:08:37,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:37,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140475770] [2021-11-12 23:08:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:37,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:37,265 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:37,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:08:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:08:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:08:38,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:08:38,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:38,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140475770] [2021-11-12 23:08:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140475770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:38,988 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:08:38,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350600575] [2021-11-12 23:08:38,988 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:38,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:08:38,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:08:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:38,990 INFO L87 Difference]: Start difference. First operand 38556 states and 64169 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 23:08:41,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:43,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:49,251 INFO L93 Difference]: Finished difference Result 79458 states and 133140 transitions. [2021-11-12 23:08:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:08:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 153 [2021-11-12 23:08:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:49,439 INFO L225 Difference]: With dead ends: 79458 [2021-11-12 23:08:49,439 INFO L226 Difference]: Without dead ends: 42722 [2021-11-12 23:08:49,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:08:49,546 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 4013 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 1106 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6905.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.43ms SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7401.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:49,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 2131 Invalid, 3863 Unknown, 0 Unchecked, 20.43ms Time], IncrementalHoareTripleChecker [1106 Valid, 2755 Invalid, 2 Unknown, 0 Unchecked, 7401.48ms Time] [2021-11-12 23:08:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42722 states. [2021-11-12 23:08:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42722 to 40212. [2021-11-12 23:08:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40212 states, 29712 states have (on average 1.5740105008077545) internal successors, (46767), 31486 states have internal predecessors, (46767), 8415 states have call successors, (8415), 1361 states have call predecessors, (8415), 2084 states have return successors, (11237), 8039 states have call predecessors, (11237), 8410 states have call successors, (11237) [2021-11-12 23:08:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40212 states to 40212 states and 66419 transitions. [2021-11-12 23:08:52,447 INFO L78 Accepts]: Start accepts. Automaton has 40212 states and 66419 transitions. Word has length 153 [2021-11-12 23:08:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:52,448 INFO L470 AbstractCegarLoop]: Abstraction has 40212 states and 66419 transitions. [2021-11-12 23:08:52,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 23:08:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 40212 states and 66419 transitions. [2021-11-12 23:08:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:08:52,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:52,453 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:52,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 23:08:52,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:52,659 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1276207898, now seen corresponding path program 1 times [2021-11-12 23:08:52,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:52,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451959130] [2021-11-12 23:08:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:52,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:52,662 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:52,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:08:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:53,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:08:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:08:53,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:08:54,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:54,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451959130] [2021-11-12 23:08:54,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451959130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:54,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:54,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:08:54,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346255045] [2021-11-12 23:08:54,863 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:54,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:08:54,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:08:54,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:08:54,865 INFO L87 Difference]: Start difference. First operand 40212 states and 66419 transitions. Second operand has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 23:08:56,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:08:58,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:10,189 INFO L93 Difference]: Finished difference Result 110573 states and 185566 transitions. [2021-11-12 23:09:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:09:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30) Word has length 158 [2021-11-12 23:09:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:10,688 INFO L225 Difference]: With dead ends: 110573 [2021-11-12 23:09:10,688 INFO L226 Difference]: Without dead ends: 72159 [2021-11-12 23:09:10,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:09:10,817 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 3141 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 883 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9618.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3212 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 5830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.56ms SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10472.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:10,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3212 Valid, 2908 Invalid, 5830 Unknown, 0 Unchecked, 33.56ms Time], IncrementalHoareTripleChecker [883 Valid, 4945 Invalid, 2 Unknown, 0 Unchecked, 10472.11ms Time] [2021-11-12 23:09:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72159 states. [2021-11-12 23:09:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72159 to 71931. [2021-11-12 23:09:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71931 states, 52939 states have (on average 1.5801016264001964) internal successors, (83649), 55972 states have internal predecessors, (83649), 15598 states have call successors, (15598), 2471 states have call predecessors, (15598), 3393 states have return successors, (20279), 14810 states have call predecessors, (20279), 15593 states have call successors, (20279) [2021-11-12 23:09:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71931 states to 71931 states and 119526 transitions. [2021-11-12 23:09:15,783 INFO L78 Accepts]: Start accepts. Automaton has 71931 states and 119526 transitions. Word has length 158 [2021-11-12 23:09:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:15,783 INFO L470 AbstractCegarLoop]: Abstraction has 71931 states and 119526 transitions. [2021-11-12 23:09:15,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 23:09:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 71931 states and 119526 transitions. [2021-11-12 23:09:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:09:15,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:15,789 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:15,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-12 23:09:16,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:09:16,003 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1338247512, now seen corresponding path program 1 times [2021-11-12 23:09:16,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:09:16,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962335998] [2021-11-12 23:09:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:16,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:09:16,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:09:16,013 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:09:16,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56b2769a-c068-4190-a20f-44f31b2ef733/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:09:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:09:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:17,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:09:18,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:09:18,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962335998] [2021-11-12 23:09:18,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962335998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:18,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:18,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:09:18,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537960945] [2021-11-12 23:09:18,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:18,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:09:18,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:09:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:09:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:09:18,214 INFO L87 Difference]: Start difference. First operand 71931 states and 119526 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 5 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 9 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 23:09:20,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:22,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:24,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:39,974 INFO L93 Difference]: Finished difference Result 188421 states and 323225 transitions. [2021-11-12 23:09:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:09:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 5 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 9 states have call predecessors, (30), 4 states have call successors, (30) Word has length 158 [2021-11-12 23:09:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:40,808 INFO L225 Difference]: With dead ends: 188421 [2021-11-12 23:09:40,808 INFO L226 Difference]: Without dead ends: 113047 [2021-11-12 23:09:41,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:09:41,473 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 4267 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 4177 mSolverCounterSat, 1252 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11645.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 5432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.73ms SdHoareTripleChecker+Time, 1252 IncrementalHoareTripleChecker+Valid, 4177 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12498.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:41,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 2805 Invalid, 5432 Unknown, 0 Unchecked, 32.73ms Time], IncrementalHoareTripleChecker [1252 Valid, 4177 Invalid, 3 Unknown, 0 Unchecked, 12498.84ms Time] [2021-11-12 23:09:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113047 states.